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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 8722. Отображено 100.
15-03-2012 дата публикации

Tranducing head writer having write pole bridge feature, and devices thereof

Номер: US20120063031A1
Автор: Alexandru Cazacu, Marcus B. Mooney, Mark Anthony Gubbins
Принадлежит: SEAGATE TECHNOLOGY LLC

A transducing head writer comprising a write pole having write pole tip, a yoke disposed on the write pole at a location that is recessed from the write pole tip, and a bridge feature disposed on the write pole between the yoke and the write pole tip, where the bridge feature has a geometry that is larger at a recessed end adjacent to the yoke compared to a proximate end adjacent to the write pole tip.

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Номер записи: 1
22-03-2012 дата публикации

Magnetic head, magnetic head assembly, and magnetic recording/reproducing apparatus

Номер: US20120069474A1
Автор: Hitoshi Iwasaki, Masayuki Takagishi, Susumu Hashimoto
Принадлежит: Toshiba Corp

According to one embodiment, a magnetic head includes a reproducing section. The reproducing section has a medium facing surface facing a magnetic recording medium and detects a direction of magnetization recorded in the medium. The reproducing section includes a first magnetic pinned layer, a second magnetic pinned layer, and a magnetic free layer. Directions of magnetizations of the first and second magnetic pinned layers are pinned. The second magnetic pinned layer is stacked with the first magnetic pinned layer in a first direction parallel to the medium facing surface. The magnetic free layer is provided between the first and second magnetic pinned layers. A direction of magnetization of the magnetic free layer is changeable. A length of the magnetic free layer along a second direction perpendicular to the medium facing surface is shorter than lengths of the first and second magnetic pinned layers along the second direction.

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Номер записи: 2
29-03-2012 дата публикации

Method for manufacturing head including light source unit for thermal assist

Номер: US20120073120A1
Автор: Koji Shimazawa, Nobuyuki Mori, Seiichi Takayama, Shinji Hara, Yoshihiro Tsuchiya
Принадлежит: TDK Corp

Provided is a method for manufacturing a thermally-assisted magnetic recording head in which a light source unit including a light source and a slider including an optical system are joined. The method comprises steps of: adhering by suction the light source unit with a back holding jig; bringing the light source unit into contact with a slider back surface of the slider; applying a load to a load application surface of the light source unit by a loading means to bring a joining surface of the light source unit into conformity with the slider back surface; positioning the light source unit apart from the slider, and then aligning the light source with the optical system; bringing again the light source unit into contact with the slider; and applying a load again to the load application surface to bring the joining surface into conformity with the slider back surface. Thus, the conformity between them can be significantly increased, thereby achieving adequately strong junction and adequately high accuracy in position.

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Номер записи: 3
10-05-2012 дата публикации

Wet etching silicon oxide during the formation of a damascene pole and adjacent structure

Номер: US20120113544A1
Автор: Christian R. Bonhôte, Kanaiyalal C. Patel
Принадлежит: Hitachi Global Storage Technologies Netherlands BV

A magnetic head according to one embodiment includes a side gap layer comprising primarily silicon nitride, wherein outer sides of the side gap layer taper away from one another from a leading end of the side gap layer towards a trailing end of the side gap layer; a seed layer above the silicon nitride side gap layer; and a magnetic pole on the seed layer. A method for forming a magnetic head according to one embodiment includes etching a channel in a silicon oxide layer; forming a side gap layer comprising primarily silicon nitride in the channel; forming a seed layer above the side gap layer; plating a pole on the seed layer; and removing the silicon oxide layer by wet etching. Additional systems and methods are also presented.

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Номер записи: 4
24-05-2012 дата публикации

Process to make pmr writer with leading edge shield (les) and leading edge taper (let)

Номер: US20120125886A1
Автор: Fenglin Liu, Honglin Zhu, Liubo Hong, Qiping Zhong
Принадлежит: Hitachi Global Storage Technologies Netherlands BV

Methods for fabrication of leading edge shields and tapered magnetic poles with a tapered leading edge are provided. The leading edge shield may be formed by utilizing a CMP stop layer. The CMP stop layer may aid in preventing over polishing of the magnetic material. For the tapered magnetic poles with a tapered leading edge, a magnetic material is deposited on a planarized surface, a patterned resist material is formed, and exposed magnetic material is etched to form at least one tapered surface of the magnetic material.

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Номер записи: 5
07-06-2012 дата публикации

Method for performing burn-in test

Номер: US20120139566A1
Автор: Koji Shimazawa, Masaaki Kaneko, Takashi Honda, Tsuguki Noma, Yoichi Mugino, Yoshito NISHIOKA
Принадлежит: ROHM CO LTD, TDK Corp

Provided is a method for performing a burn-in test on an object under test in which a plurality of electrodes are provided in positions at different heights. The method comprising steps of: preparing an object under test in which an electrode in a higher position have a higher surface roughness among the plurality of electrodes; bringing a plurality of sheet-type probes into contact with the plurality of electrodes, respectively; and supplying an electric current with the plurality of electrodes through the plurality of sheet-type probes. By implementing the method, the sheet-type probes can be kept in stable contact with the electrodes because electrodes in a higher position have a higher surface roughness Ra than electrodes in a lower position. Consequently, stable and reliable burn-in test can be performed.

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Номер записи: 6
14-06-2012 дата публикации

Magnetic head for perpendicular magnetic recording with shield around main pole

Номер: US20120147501A1
Автор: Atsushi Iijima, Hiroyuki Ito, Kazuki Sato, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A magnetic head includes a shield, and first and second return path sections. The shield has an end face that is located in a medium facing surface to wrap around an end face of a main pole. The shield includes a bottom shield, two side shields, and a top shield. The first return path section includes a yoke layer, and first and second coupling layers that magnetically couple the bottom shield and the yoke layer to each other. The first coupling layer is magnetically connected to the bottom shield. The second coupling layer magnetically couples the first coupling layer to the yoke layer. No end faces of the second coupling layer are exposed in the medium facing surface. The second return path section magnetically couples the top shield and the main pole to each other.

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Номер записи: 7
21-06-2012 дата публикации

Method for manufacturing a perpendicular magnetic write pole having a write pole and trailing shield with a tapered trailing gap

Номер: US20120154951A1
Автор: Aron Pentek, Fenglin Liu, Wen-Chien D. Hsiao, Yi Zheng
Принадлежит: Hitachi Global Storage Technologies Netherlands BV

A method for manufacturing a magnetic write head having a that has a write pole with a tapered trailing edge in a pole tip region, and a trailing shield that has a leading edge that tapers away from the write pole at an angle that is greater than that taper angle of the trailing edge of the write pole. The magnetic head has a step feature with a front edge that is recessed from the ABS. In one embodiment a magnetic wedge is formed over the tapered surface of the write pole. In another embodiment, a non-magnetic bump is formed over a first tapered portion of the write pole adjacent to the front edge of the step feature, and a non-magnetic wedge is formed over a second tapered portion of the write pole and extends from the non-magnetic bump to the air bearing surface.

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Номер записи: 8
28-06-2012 дата публикации

Nicr as a seed stack for film growth of a gap layer separating a magnetic main pole or shield

Номер: US20120164486A1
Автор: Brian R. York, Christian Rene Bonhote, Ning Shi, Stefan Maat
Принадлежит: Hitachi Global Storage Technologies Netherlands BV

A method and apparatus for a high-moment magnetic material used in a write head deposited on a gap layer that was grown using a nickel-chromium seed layer. The nickel-chromium seed layer provides the correct crystallographic orientation for both the nonmagnetic gap layer and the high-moment magnetic material such that the high-moment magnetic material has soft-magnetic properties and is useful as either a main pole or as shield layer in a write head. Moreover, the nickel-chronium seed layer, which may be exposed on the air bearing surface (ABS) of the write head, has an etch rate similar to other metals found in the ABS, thereby avoiding pole tip protrusion during later processing.

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Номер записи: 9
05-07-2012 дата публикации

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

Номер: US20120170154A1
Автор: Atsushi Iijima, Hiroyuki Ito, Kazuki Sato, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, and a thin-film coil are laminated on a substrate. The thin-film coil has a coil-layer. The coil-layer has a turn part arranged closer to an ABS than is a rear end part of the main magnetic pole layer farthest from the ABS. Regarding a substrate side coil-layer, arranged between the main magnetic pole layer and the substrate, of the coil-layer, a thickness of a non-corresponding magnetic pole part other than a magnetic pole corresponding part corresponding to an arrangement space of the main magnetic pole layer is larger than a thickness of the magnetic pole corresponding part.

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Номер записи: 10
30-08-2012 дата публикации

Magnetic head for perpendicular magnetic recording that includes a sensor for detecting contact with a recording medium

Номер: US20120218663A1
Автор: Atsushi Iijima, Hiroyuki Ito, Kazuki Sato, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A magnetic head includes a main pole, a write shield, a return path section, a heater that generates heat for making part of a medium facing surface protrude, and a sensor that detects contact of the part of the medium facing surface with a recording medium. The return path section includes: a yoke layer located backward of the main pole along the direction of travel of the recording medium; a first coupling part coupling the yoke layer and the write shield to each other; and a second coupling part located away from the medium facing surface and coupling the yoke layer and the main pole to each other. The first coupling part has an end face facing toward the yoke layer. This end face includes a middle portion spaced from the yoke layer and facing the yoke layer, and two side portions located on opposite sides of the middle portion in a track width direction and in contact with the yoke layer. The sensor is located between the middle portion and the yoke layer.

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Номер записи: 11
20-09-2012 дата публикации

Write pole fabricated using a carbon hard mask and method of making

Номер: US20120236437A1
Автор: Michael Christopher Kautzky
Принадлежит: SEAGATE TECHNOLOGY LLC

A magnetic writer comprises a write pole, a substrate and a non-magnetic, oxygen-free buffer material. The write pole has a leading edge, a trailing edge, a first side and second side. The substrate is at the leading edge of the write pole. The non-magnetic, oxygen-free buffer material is located between the write pole and the substrate, and the oxygen-free buffer material is selected from Re, Ru, Os, Rh, Ir, and combinations thereof.

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Номер записи: 12
11-10-2012 дата публикации

Magnetic head for perpendicular magnetic recording having a main pole and a shield

Номер: US20120257304A1
Автор: Atsushi Iijima, Hiroyuki Ito, Kazuki Sato, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A magnetic head includes a coil, a main pole, a write shield, and first and second yoke layers. The first and second yoke layers are magnetically connected to the write shield and aligned along the direction of travel of a recording medium such that the main pole is interposed therebetween. The coil includes a winding portion of planar spiral shape that is formed in one or more layers. The magnetic head further includes: a first coupling part located away from the medium facing surface and magnetically coupling the main pole and the second yoke layer to each other; and a second coupling part located away from the medium facing surface and magnetically coupling the first yoke layer and the second yoke layer to each other without touching the main pole. The winding portion is wound around the first coupling part, and a part of the winding portion passes between the first and second coupling parts.

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Номер записи: 13
18-10-2012 дата публикации

Magnetic head, head gimbal assembly with the same, and disk drive

Номер: US20120262820A1
Автор: Hitoshi Iwasaki, Katsuhiko Koui, Kenichiro Yamada, Masayuki Takagishi, Takuya Matsumoto
Принадлежит: Toshiba Corp

According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

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Номер записи: 14
18-10-2012 дата публикации

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

Номер: US20120262825A1
Автор: Atsushi Iijima, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, and a thin-film coil are laminated on a substrate. The write shield layer has an opposing shield part opposing the main magnetic pole layer and a front shield part. The front shield part is connected to the opposing shield part without straddling the thin-film coil. Besides, the front shield part has a shield front end face disposed in the medium-opposing surface and a shield upper end face formed distanced from the medium-opposing surface. Further, the front shield part has a shield connecting part. The shield front end face is connected to the shield upper end face by the shield connecting part.

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Номер записи: 15
25-10-2012 дата публикации

Magnetic recording head and magnetic recording apparatus

Номер: US20120268844A1
Автор: Hitoshi Iwasaki, Junichi Akiyama, Kenichiro Yamada, Mariko Shimizu, Masahiro Takashita, Masayuki Takagishi, Shuichi Murakami, Tadashi Kai, Tomomi Funayama
Принадлежит: Toshiba Corp

An example magnetic writing head includes a main magnetic pole, a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field, and a laminated body. The laminated body includes a first magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole and a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole.

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Номер записи: 16
25-10-2012 дата публикации

Write pole and shield with different taper angles

Номер: US20120268845A1
Автор: David Christopher Seets, Hui Tao Brickner, Mark T. Kief, Michael Christopher Kautzky, Sarbeswar Sahoo
Принадлежит: SEAGATE TECHNOLOGY LLC

A first trench sidewall has a continuous first taper angle that terminates at a first plane. At least one layer may be deposited that forms a second trench sidewall with a continuous second taper angle that extends a predetermined depth past the first plane and is less than the first taper angle. A write pole may then be formed on the second trench sidewall with the write pole being closer to the first trench sidewall at the predetermined depth than at the first plane.

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Номер записи: 17
25-10-2012 дата публикации

Compositions and methods for altering tocotrienol content

Номер: US20120272407A1
Автор: Edgar B. Cahoon, Karlene H. Butler, Rebecca E. Cahoon, Sean J. Coughlan
Принадлежит: EI Du Pont de Nemours and Co

The invention provides isolated nucleic acids and their encoded polypeptides that alter tocol content in seeds. The invention further provides expression cassettes, host cells and transformed plants containing the nucleic acids. The present invention further provides methods for altering tocol content in seeds.

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Номер записи: 18
15-11-2012 дата публикации

Co/Ni multilayers with improved out-of-plane anisotropy for magnetic device applications

Номер: US20120286382A1
Автор: Guenole Jan, Ru Ying Tong, Witold Kula, Yu Jen Wang
Принадлежит: MagIC Technologies Inc

A MTJ for a spintronic device is disclosed and includes a thin seed layer that enhances perpendicular magnetic anisotropy (PMA) in an overlying laminated layer with a (Co/Ni) n composition or the like where n is from 2 to 30. The seed layer is preferably NiCr, NiFeCr, Hf, or a composite thereof with a thickness from 10 to 100 Angstroms. Furthermore, a magnetic layer such as CoFeB may be formed between the laminated layer and a tunnel barrier layer to serve as a transitional layer between a (111) laminate and (100) MgO tunnel barrier. There may be a Ta insertion layer between the CoFeB layer and laminated layer to promote (100) crystallization in the CoFeB layer. The laminated layer may be used as a reference layer, dipole layer, or free layer in a MTJ. Annealing between 300° C. and 400° C. may be used to further enhance PMA in the laminated layer.

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Номер записи: 19
22-11-2012 дата публикации

Writer design with enhanced writability

Номер: US20120295132A1
Автор: Lijie Guan, Suping Song, Tai Min, Yuhui Tang
Принадлежит: Headway Technologies Inc

A perpendicular magnetic recording (PMR) head is fabricated with a main pole and a trailing edge shield having surfaces and interior portions that may include synthetic antiferromagnetic multi-layered superlattices (SAFS) formed on and/or within them respectively. The SAFS, which are multilayers formed as periodic multiples of antiferromagnetically coupled tri-layers, provide a mechanism for enhancing the component of the writing field that is vertical to the magnetic medium by exchange coupling to the magnetization of the pole and shield and constraining the directions of their magnetizations to lie within the film plane of the SAFS.

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Номер записи: 20
22-11-2012 дата публикации

Writer with an AFM write gap

Номер: US20120295133A1
Автор: Lijie Guan, Min Li, Tai Min, Yuhui Tang
Принадлежит: Headway Technologies Inc

A perpendicular magnetic recording (PMR) head is fabricated with main pole and a trailing edge shield antiferromagnetically coupled across a write gap by either having the write gap layer formed as a synthetic antiferromagnetic tri-layer (SAF) or formed as a monolithic layer of antiferromagnetic material. The coupling improves the write performance of the writer by enhancing the perpendicular component of the write field and its gradient. Methods of fabricating the writer are provided.

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Номер записи: 21
29-11-2012 дата публикации

Multi gap inductor core, multi gap inductor, transformer and corresponding manufacturing method and winding

Номер: US20120299680A1
Автор: Franc Zajc
Принадлежит: Individual

The invention provides a multi gap inductor core, a multi gap inductor, transformer, and a corresponding manufacturing method and winding. The multi gap inductor core ( 1; 1′; 1″; 1 ′″), comprises a first plurality of magnetic lamination sheets ( 2 a - 2 g; 2 a ′- 2 m′; 2 a ″- 2 n ″) made of magnetic core material arranged in a stack and a second plurality of fixing layers ( 3 a - 3 f ; 3 a ′- 3 l′; 3 a ″- 3 l ″) made of a fixing material. Each fixing layer ( 3 a - 3 f; 3 a ′- 3 l′; 3 a ″- 3 l ″) is arranged between a corresponding pair of adjacent magnetic lamination sheets ( 2 a - 2 g; 2 a ′- 2 m′; 2 a ″- 2 n ″) and includes mechanical spacer means ( 4; 4 ′) which define a gap (G) having a predetermined thickness (d 2 ) between a corresponding pair of adjacent magnetic lamination sheets ( 2 a - 2 g; 2 a ′- 2 m′; 2 a ″- 2 n ″).

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Номер записи: 22
27-12-2012 дата публикации

Chamfered Magnetic Write Pole

Номер: US20120327535A1
Автор: Chris Rea, Eric Linville, Eric Roger Meloche, Huaqing Yin, Jianhua Xue
Принадлежит: SEAGATE TECHNOLOGY LLC

A write pole can have a magnetically conductive pole tip has at least one corner. The at least one corner may be chamfered to limit magnetic saturation of the conductive pole tip. The conductive pole tip can have one or more beveled surface that has a chamfered corner which extends a predetermined distance along an edge of the write pole.

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Номер записи: 23
03-01-2013 дата публикации

Method of Forming a PMR Writer Device with Multi-Level Tapered Write Pole

Номер: US20130001190A1
Автор: Kowang Liu, Moris Dovek, Yan Wu, Zhigang Bai
Принадлежит: Headway Technologies Inc

A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole which creates an efficient channeling of magnetic flux to the pole tip. The write pole comprises a main pole with a tapered tip on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the tapered tip, giving the write pole a stepped profile. The tapered tip can be two sloped surfaces that are symmetric about a mid plane of the main pole or a single sloped edge on the leading side or the trailing side of the pole. The yoke structure can consist of a single yoke formed on one side of the main pole or it can consist of two yokes formed symmetrically on both the leading and trailing sides of the main pole.

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Номер записи: 24
17-01-2013 дата публикации

Magnetic recording head with notched shield

Номер: US20130016442A1
Автор: Mourad Benakli, Sharat Batra
Принадлежит: SEAGATE TECHNOLOGY LLC

A magnetic recording head includes a magnetic recording write element including a main pole having a leading edge and an opposing trailing edge and a first side surface and a second side surface separating the leading edge from the trailing edge. A first side shield gap separates a first side shield from the first side of the main pole and a second side shield gap separates the second side shield from the second side of the main pole. A front magnetic shield is separated from the main pole trailing edge by a front shield gap. A recess extends into the front shield adjacent to the trailing edge, and parallel to the trailing edge. The recess extends laterally away from the main pole and into the front shield a distance greater than the first side shield gap or second side shield gap.

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Номер записи: 25
31-01-2013 дата публикации

Energy-assisted magnetic recording head and magnetic recording device

Номер: US20130028058A1
Автор: Harukazu Miyamoto, Kan Yasui, Masukazu Igarashi
Принадлежит: HITACHI LTD

In a case in which a microwave-assisted magnetic recording system is applied to a shingled write system for recording with high density, the width of a high-frequency generation element is narrower than a track width of main pole, and both steep parts of magnetic field gradients 24 and 25 are overlap each other by performing offset of a high-frequency magnetic field generating unit 17 of the magnetic head for shingled write from the central line of the main pole 8 in the both areas having high magnetic field gradient. At that time, a magnetic field vector 11 from the main pole 8 is perpendicular incident on a film surface of the high-frequency magnetic field generating unit by using means such as a method for arranging a shield material having high magnetic permeability so that main pole magnetic field is corrected and induced, a method for arranging a hard bias layer to which a desired static magnetic field is added, and a method for obliquely forming a high-frequency magnetic field generating unit, thereby performing stable oscillation to realize magnetic recording with high density.

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Номер записи: 26
14-02-2013 дата публикации

Magnetic head for perpendicular magnetic recording having a main pole, a shield and a coil core part setback away from the medium facing surface a specified distance

Номер: US20130038966A1
Автор: Atsushi Iijima, Hiroyuki Ito, Kazuki Sato, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A magnetic head includes: a main pole; a coil; a first shield having an end face that is located in a medium facing surface at a position forward of an end face of the main pole along a direction of travel of a recording medium; and a first return path section disposed forward of the main pole along the direction of travel of the recording medium. The first return path section connects part of the main pole away from the medium facing surface to the first shield so that a first space is defined. The coil includes a first portion having a planar spiral shape and wound around a core part of the first return path section. The first portion includes first and second coil elements that each extend through the first space. No part of the coil other than the first and second coil elements exists in the first space.

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Номер записи: 27
04-04-2013 дата публикации

Method for manufacturing a magnetic write pole of a perpendicular magnetic write head using novel mask fabrication

Номер: US20130081263A1
Автор: Guomin Mao, Sue Siyang Zhang, Yi Zheng
Принадлежит: Hitachi Global Storage Technologies Netherlands BV

A method for manufacturing a magnetic write pole of a magnetic write head for perpendicular magnetic recording. A magnetic write pole material is deposited, followed by union milling hard mask, a polymer mask under-layer followed by a dielectric hard mask material, followed by a photoresist. The photoresist is patterned to define a write pole shape and the shape of the patterned photoresist is transferred onto the underlying dielectric hard mask by a novel reactive ion etching that is performed in a chemistry that includes one or more fluorine containing gases and He. The presence of He in the reactive ion etching tool helps to improve the profile of the patterned dielectric hard mask. In addition, RIE parameters such a gas ratio (e.g. CF4 to CHF3 gas ratio) and power ratio (e.g. source power to bias power) are adjusted to optimize the profile of the patterned dielectric mask.

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Номер записи: 28
04-04-2013 дата публикации

BIASING STRUCTURE FOR WRITE ELEMENT DOMAIN CONTROL IN A MAGNETIC WRITER

Номер: US20130083429A1
Автор: Czoschke Peter Jeremy, Macken Declan, Singleton Eric Walter
Принадлежит: SEAGATE TECHNOLOGY LLC

A magnetic writer includes a write element having a first domain pattern when in a quiescent state and a second domain pattern when in an active state. A biasing structure is configured to induce the write element into the first domain pattern when the magnetic writer is in the quiescent state. 1. A device comprising:a biasing structure configured to induce a write element into a first domain pattern when the device is not in a quiescent state, wherein the first domain pattern is related to the quiescent state of the device.2. The device of claim 1 , wherein contours of the biasing structure are substantially similar to contours of the first domain pattern.3. The device of claim 1 , wherein the biasing structure has a generally oval shape.4. The device of claim 1 , wherein the biasing structure is adjacent the write element.5. The device of claim 1 , wherein the write element includes a write pole body and a yoke.6. The device of claim 5 , wherein the biasing structure is adjacent at least one of the write pole body and the yoke.7. The device of claim 5 , wherein the biasing structure includes a layer within one of the write pole body and the yoke.8. The device of claim 1 , wherein the biasing structure comprises an antiferromagnet exchange coupled to the write element.9. The device of claim 8 , wherein the antiferromagnet comprises a synthetic antiferromagnet (SAF).10. The device of claim 1 , wherein the biasing structure comprises a permanent magnet.11. A device comprising:a biasing structure adjacent to or within a write element and having a shape that is based on a first domain pattern, wherein the write element has the first domain pattern when the device is in a quiescent state.12. The device if claim 11 , wherein contours of the biasing structure are substantially similar to contours of the first domain pattern.13. The device of claim 12 , wherein the biasing structure has a generally oval shape.14. The device of claim 11 , wherein the biasing structure ...

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Номер записи: 29
11-04-2013 дата публикации

METHOD OF MAKING MAGNETICALLY SHIELDED WRITE TRANSDUCERS

Номер: US20130086799A1
Автор: Biskeborn Robert G., Herget Philipp
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

A method according to one embodiment includes forming a lower shield of a shield structure; forming a portion of a magnetic yoke for each of at least two write transducers above the lower shield of the shield structure; and forming an upper shield of the shield structure above the portions of the yokes of each of two of the at least two write transducers, the shields being formed of a magnetically permeable material, wherein the upper and lower shields are magnetically connected. 1. A method , comprising:forming a lower shield of a shield structure;forming a portion of a magnetic yoke for each of at least two write transducers above the lower shield of the shield structure; andforming an upper shield of the shield structure above the portions of the yokes of each of two of the at least two write transducers,the shields being formed of a magnetically permeable material,wherein the upper and lower shields are magnetically connected.2. A method as recited in claim 1 , wherein one of the shields of the shield structure is a common shield between an immediately adjacent two of the at least two write transducers.3. A method as recited in claim 1 , wherein the shield structure has shields adjacent five sides of at least one of the write transducers.4. A method as recited in claim 1 , wherein the at least two write transducers are positioned adjacent each other and aligned along a line oriented generally perpendicular to a direction of travel of the magnetic medium thereacross.5. A method as recited in claim 1 , wherein none of the shields of the shield structure is a common shield between an immediately adjacent two of the at least two write transducers.6. A method as recited in claim 1 , wherein the shield structure has shields adjacent four sides of at least one of the write transducers.7. A method as recited in claim 1 , wherein the at least two write transducers have a media facing side claim 1 , wherein at least some of the shields are recessed from a plane extending ...

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Номер записи: 30
25-04-2013 дата публикации

Tape drive head with jointly optimized shield-to-sheild gap and sensor width

Номер: US20130100554A1
Автор: Giovanni Cherubini, Mark A. Lantz, Pierre-Olivier Jubert, Robert G. Biskeborn, Simeon Furrer
Принадлежит: International Business Machines Corp

A tape drive head includes a set of one or more servo readers designed for reading a servo pattern of a linear recording tape for positioning of the tape drive head, each of the servo readers of the set having: a sensor for sensing a magnetic field component of a servo pattern upon reading it; a first shield and a second shield, one on each side of the sensor, the shields configured to shield spurious components of magnetic fields occurring upon reading the linear recording tape, wherein: a gap between the first shield and the second shield is between 0.4 μm and 1 μm, and a minimal width of the sensor, the first shield and the second shield, in a direction perpendicular to the gap, is between 0.5 μm and 4 μm.

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Номер записи: 31
09-05-2013 дата публикации

MANUFACTURING METHODS FOR WRITE HEADS WITH FLOATING SIDE SHIELDS

Номер: US20130114164A1
Автор: Benakli Mourad, Mallary Michael
Принадлежит: SEAGATE TECHNOLOGY LLC

A write head has a pole tip, a write yoke connected to the pole tip, a write return yoke, a write shield, and one or more side shields disposed in close proximity to the pole tip. The write return yoke connects to the write yoke on one end and the write shield on a different end. The one or more side shields are separated from the pole tip and write shields by a non-magnetic material and therefore are “floating” and not directly coupled to the write shield or pole tip. 1. A write head for a disk drive comprising:a pole tip;a write yoke connected to the pole tip;a write return yoke, wherein the write yoke connects to a first end of the write return yoke;a write shield connected to a second end of the write return yoke different from the first end, and the write shield separated from the pole tip by a write gap distance; andone or more side shields disposed in close proximity to the pole tip;wherein each of the one or more side shields is separated from the pole tip by a non-magnetic material or by a magnetic material with low saturation magnetization or by a magnetic material with low permeability; andwherein each of the one or more side shields is separated from the write shield by a particular non-magnetic material or by a particular magnetic material with low saturation magnetization or by a particular magnetic material with low permeability and the write shield separated from each of the one or more side shields by the write gap distance and the one or more side shields have a higher magnetic potential than the write shield.2. The write head of claim 1 ,wherein each of the one or more side shields is separated from the pole tip by the non-magnetic material; andwherein each of the one or more side shields is separated from the write shield by the particular non-magnetic material.3. The write head of claim 2 , wherein the particular non-magnetic material is a same material as the non-magnetic material.4. The write head of claim 1 , wherein the one or more side ...

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Номер записи: 32
16-05-2013 дата публикации

HIGH-FREQUENCY MAGNETIC FIELD GENERATION ELEMENT AND MAGNETIC HEAD

Номер: US20130120875A1
Автор: Kudo Kiwamu, Mizushima Koichi, Nagasawa Tazumi, Sato Rle, Suto Hirofumi, Yang Tao
Принадлежит:

According to one embodiment, a high-frequency magnetic field generation element includes a first fixed layer, a first free layer, and a second free layer. A direction of a magnetization of the first fixed layer is fixed and has a component parallel to a first direction. A direction of a magnetization of the first free layer is variable and has a component orthogonal to the first direction. A direction of a magnetization of the second free layer is variable and has a component orthogonal to the first direction. The first fixed layer is provided between the first free layer and the second free layer. The magnetizations of the first free layer and the second free layer oscillate. A rotation direction of the magnetization of the first free layer is opposite to a rotation direction of the magnetization of the second free layer. 1. A high-frequency magnetic field generation element comprising:a first fixed layer, a direction of a magnetization of the first fixed layer being fixed and, the first fixed layer including a component parallel to a first direction;a first free layer stacked with the first fixed layer, a direction of a magnetization of the first free layer being variable and, the first free layer including a component orthogonal to the first direction; anda second free layer stacked with the first fixed layer, a direction of a magnetization of the second free layer being variable and, the second free layer including a component orthogonal to the first direction,the first fixed layer being provided between the first free layer and the second free layer,the first direction being parallel to a stacking direction of the first fixed layer, the first free layer, and the second free layer,the magnetization of the first free layer and the magnetization of the second free layer oscillating by a current flowing through the first free layer, the second free layer, and the first fixed layer, anda rotation direction of the magnetization in the oscillation of the first free ...

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Номер записи: 33
16-05-2013 дата публикации

Magnetic write head with novel shield structure

Номер: US20130120876A1
Автор: Hiromi Shiina, Kazue Kudo, Kimitoshi Eto, Maki Maeda, Masafumi Mochizuki
Принадлежит: Hitachi Global Storage Technologies Netherlands BV

A magnetic write head having a gap structure that improves write head performance. The write head includes a magnetic write pole and a magnetic shield that is separated from the trailing edge of the write pole by a non-magnetic trailing gap layer and is separated from the sides of the write pole by non-magnetic side gap layers. The trailing gap extends laterally beyond the side gap layers, and a convex bump is formed an edge of the magnetic shield at a location near the trailing end of the side gap layers.

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Номер записи: 34
16-05-2013 дата публикации

HEAD IC AND MAGNETIC DISK APPARATUS HAVING MICROWAVE ASSISTANCE FUNCTION

Номер: US20130120877A1
Автор: AMEMIYA Yoshihiro
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, it is determined whether a STOAR element which performs microwave assistance for a magnetic disk apparatus is made to oscillate properly. When the STOAR element is oscillating when a current bias is applied, the resistance of the element increases. Therefore, in a head IC which outputs the current bias, a voltage applied to the STOAR element is sensed, and it is possible to determine that the STOAR element is oscillating when the voltage is increased to a threshold or more. Conversely, it is possible to determine that the STOAR element is not oscillating when the voltage is less than the threshold. In addition, it is possible to determine that oscillation has diminished, when the resistance decreases after the voltage reaches the threshold or more. Therefore, it is possible to make the STOAR element oscillate normally again, by boosting the STOAR element by a current. 1. A magnetic disk apparatus comprising:a head comprising a microwave-assistance element;a head amplifier comprising: a current source configured to supply current; and a detection module configured to compare a threshold voltage and an element voltage generated at the microwave-assistance element when the current source supplies the current to the microwave-assistance element, and to detect that the element voltage is lower than the threshold voltage, the head amplifier being connected to the head; anda controller configured to increase an amount of the current to be supplied to the microwave-assistance element when the detection module of the head amplifier detects that the element voltage is lower than the threshold voltage.2. The magnetic disk apparatus of claim 1 , wherein:the element voltage is a voltage which generates at the microwave-assistance element based on a resistance value of the microwave-assistance element; andthe element voltage being lower than the threshold voltage comprises that the microwave-assistance element is not oscillating.3. The magnetic disk ...

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Номер записи: 35
23-05-2013 дата публикации

DEVICE, METHOD OF FABRICATING A MEDIA AND METHOD OF SERVO WRITING

Номер: US20130128377A1
Автор: LEONG Siang Huei, Lim Joo Boon Marcus, LIU Bo, Yuan Zhimin
Принадлежит:

A device may be provided. The device includes a media including a servo layer and a data recording layer, and a recording head including a dimension sized to produce a magnetic writing field to write servo information on the servo layer. 1. A device , comprising:a media comprising a servo layer and a data recording layer;a recording head comprising a dimension sized to produce a magnetic writing field to write servo information on the servo layer.2. The device of claim 1 ,wherein the data recording layer is disposed between the recording head and the servo layer.3. The device of claim 1 ,wherein the recording head is a longitudinal ring recording head.4. The device of claim 1 ,wherein the recording head is a single pole perpendicular magnetic recording head.5. The device of claim 1 ,wherein the recording head is a shingled recording head.6. The device of claim 1 ,wherein the recording head is configured to write servo information on the servo layer using a shingled writing scheme.7. The device of claim 1 , further comprising:a further recording head configured to produce a magnetic writing field to write data on the data recording layer.8. The device of claim 7 ,wherein the device is configured to adjust a writing current of the further recording head.9. The device of claim 8 ,wherein the further recording head is configured to adjust the magnetic writing field when the writing current is adjusted.10. The device of claim 9 ,wherein the magnetic writing field of the further recording head is smaller than the magnetic writing field of the recording head.11. The device of claim 7 ,wherein the further recording head has a smaller dimension than the recording head.12. The device of claim 7 ,wherein the further recording head is a disk certification head.13. The device of claim 1 ,wherein the device comprises any one of a group consisting of a data storage device, a disk servo writer, a spinstand, a disk certifier and a drag tester.14. A method of fabricating a media ...

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Номер записи: 36
23-05-2013 дата публикации

OVERCOATS THAT INCLUDE MAGNETIC MATERIALS

Номер: US20130128385A1
Автор: Hoehn Joel William, Karr Brian William, Kautzky Michael Christopher, Macken Declan, Platt Christopher Loren, Sahoo Sarbeswar, Wu Mei-Ling
Принадлежит: SEAGATE TECHNOLOGY LLC

A device having an air bearing surface, the device including a writer portion having an air bearing surface at the air bearing surface of the device; and an overcoat layer disposed on at least a portion of the air bearing surface of the writer portion, wherein the overcoat includes a material having a magnetic moment of at least about 0.1 Tesla (T). 1. A device having an air bearing surface , the device comprising:a writer portion having an air bearing surface at the air bearing surface of the device; andan overcoat disposed on at least a portion of the air bearing surface of the writer portion, wherein the overcoat comprises a material having a magnetic moment of at least about 0.1 Tesla (T).2. The device according to claim 1 , wherein the overcoat is disposed on substantially all of the air bearing surface of the writer portion.3. The device according to further comprising a reader portion claim 1 , wherein the overcoat is also disposed on at least a portion of the air bearing surface of the reader portion.4. The device according to claim 1 , wherein the overcoat comprises a material having a magnetic moment of at least about 0.5 Tesla (T).5. The device according to claim 1 , wherein the overcoat comprises a material having a magnetic moment of at least about 0.75 Tesla (T).6. The device according to claim 1 , wherein the overcoat comprises a material having a corrosion potential between about 0.0 to −0.1 V in an acidic solution.7. The device according to claim 1 , wherein the overcoat comprises a material having a corrosion potential greater than or equal to about −0.2 V in a neutral solution.8. The device according to claim 1 , wherein the overcoat comprises a material having a corrosion potential between about 0.0 to −0.1 V in an acidic solution and a corrosion potential greater than or equal to about −0.2 V in a neutral solution.9. The device according to claim 1 , wherein the overcoat comprises a material that is electrically insulating.10. The device ...

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Номер записи: 37
23-05-2013 дата публикации

Trapezoidal Back Bias and Trilayer Reader Geometry to Enhance Device Performance

Номер: US20130128390A1
Автор: "Vasko Vladyslav A.", Chen Yonghua, Craig Beverley, Gao Kaizhong, Qiu Jiaoming, Wang Zhongyan
Принадлежит: SEAGATE TECHNOLOGY LLC

A magnetoresistive sensor is generally disclosed. Various embodiments of a sensor can have at least a trilayer sensor stack biased with a back biasing magnet adjacent a back of the trilayer sensor. The back biasing magnet, the trilayer sensor stack, or both have substantially trapezoidal shapes to enhance the biasing field and to minimize noise. 1. A magnetic sensor comprising a trilayer stack disposed between an air bearing surface (ABS) and a back biasing magnet , the back biasing magnetic and trilayer stack shaped substantially as trapezoids to provide a predetermined micromagnetic magnetization shape in the trilayer stack.2. The magnetic sensor of claim 1 , wherein the back bias magnet has a magnet width claim 1 , as measured parallel to the ABS claim 1 , that reduces as it approaches the ABS.3. The magnetic sensor of claim 2 , wherein the trilayer stack has a stack width claim 2 , as measure parallel to the ABS claim 2 , that reduces as it approaches the ABS.4. The magnetic sensor of claim 1 , wherein the trilayer stack has a pair of stack sidewalls extending from the ABS at a first predetermined angle and the back biasing magnet has a pair of magnet sidewalls extending away from the ABS at a second predetermined angle claim 1 , the first and second angles being the same.5. The magnetic sensor of claim 1 , wherein the trilayer stack has a pair of stack sidewalls extending from the ABS at a first predetermined angle and the back biasing magnet has a pair of magnet sidewalls extending away from the ABS at a second predetermined angle claim 1 , the first and second angles being different.6. The magnetic sensor of claim 1 , wherein the biasing magnet provides vertical bias to the trilayer stack.7. The magnetic sensor of claim 1 , wherein the biasing magnet comprises a hard magnetic material.8. The magnetic sensor of claim 7 , wherein the hard magnetic material is a cobalt- platinum based alloy or iron-platinum based alloy.9. The magnetic sensor of claim 1 , wherein ...

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Номер записи: 38
30-05-2013 дата публикации

Perpendicular magnetic recording write head with ladder network compensation circuitry on slider body for write current overshoot at write current switching

Номер: US20130135765A1
Автор: David John Seagle, John Thomas Contreras, Samir Y. Garzon
Принадлежит: Individual

Write enhancement circuitry on the head carrier of a magnetic recording disk drive provides additional write current overshoot beyond that provided by the write driver circuitry. The write enhancement circuitry is formed on the head carrier as ladder network blocks. A first ladder network block is a first capacitor C 1 located in parallel with the write coil. The second ladder network block includes a second capacitor C 2 having substantially the same inductance L 2 . The compensation circuitry is referred to as a ladder network because additional ladder blocks, like the second block but with different values of capacitance and inductance, may be located on the head carrier.

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Номер записи: 39
06-06-2013 дата публикации

MAGNETIC STORAGE DEVICE

Номер: US20130141818A1
Автор: Dorai Rajesh, Kontos Alexander C., SINCLAIR Frank
Принадлежит: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.

A write head for a magnetic storage device includes a writing tip comprising a magnetic material, a write pulse generator configured to generate a write pulse signal comprising a varying voltage bias between the magnetic storage device and the writing tip. The write pulse signal comprising one or more write pulses effective to tunnel electrons from the writing tip to the magnetic storage device. The data stream generator configured to provide a data stream signal to the writing tip where the data stream signal is operative to vary spin polarity in the electrons from a first polarity to a second polarity. 1. A write head for a magnetic storage device comprising:a writing tip comprising a magnetic material;a write pulse generator configured to generate a write pulse signal comprising a varying voltage bias between the magnetic storage device and the writing tip, the write pulse signal including one or more write pulses effective to tunnel electrons from the writing tip to the magnetic storage device; anda data stream generator configured to provide a data stream signal to the writing tip, the data stream signal operative to vary spin polarity in the electrons from a first polarity to a second polarity.2. The write head of claim 1 , further comprising:an electrically conductive writing member connected to the writing tip coil; anda writing coil disposed proximate the electrically conductive writing member and coupled to the data stream generator, the data stream signal operative to vary a current direction within the writing coil from a first current direction to a second current direction opposite the first direction.3. The write head of claim 2 , wherein the first current direction is configured to generate first electrons at the writing tip having the first spin polarity claim 2 , and the second current direction configured to generate second electrons at the writing tip having the second spin polarity.4. The write head of claim 1 , wherein the writing tip ...

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Номер записи: 40
06-06-2013 дата публикации

MAGNETIC WRITER FOR PATTERNED MEDIA WITH INCREASED WRITE FIELD

Номер: US20130141819A1
Автор: Gao Kaizhong, He Ching, MALLARY MICHAEL L.
Принадлежит: Seagate Technoloy LLC

A magnetic writer writes to a magnetic medium including a plurality of tracks that each includes a plurality of isolated magnetic elements for storage of information. The magnetic writer includes a write element having a write element tip having a leading edge, a trailing edge, and first and second side edges extending between the leading edge and the trailing edge. A side shield is proximate the first side edge and no shield is proximate the second side edge. 1. A magnetic writer for writing to a magnetic medium including a plurality of tracks that each includes a plurality of isolated magnetic elements for storage of information , the magnetic writer comprising:a write element including a write element tip having a leading edge, a trailing edge, and first and second side edges connecting the leading edge to the trailing edge; anda first shield proximate a first side edge and no shield proximate the second side edge.2. The magnetic write of claim 1 , wherein the write element has a write element tip length extending from the leading edge to the trailing edge claim 1 , and wherein the first shield has a down-track length less than or equal to the write element tip length.3. The magnetic writer of claim 1 , wherein the leading edge claim 1 , the trailing edge claim 1 , and the first and second side edges define a medium confronting surface having a substantially trapezoidal profile with a maximum width at the trailing edge.4. The magnetic writer of claim 1 , and further comprising:a second shield proximate the trailing edge of the write element tip.5. The magnetic writer of claim 4 , wherein the second shield is integral with the first shield.6. The magnetic writer of claim 1 , wherein a width of the trailing edge is greater than each isolated magnetic element.7. The magnetic writer of claim 1 , wherein at least one surface of the write element that extends in a cross-track direction has no line of symmetry.8. The magnetic writer of claim 7 , wherein the at least one ...

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Номер записи: 41
06-06-2013 дата публикации

Shield With Continuously Concave Inner Sidewall

Номер: US20130141820A1
Автор: Benakli Mourad, Gao Kaizhong
Принадлежит: SEAGATE TECHNOLOGY LLC

A write element for magnetic recording includes a main pole and a shield. The main pole has first and second sides with respect to a down-track direction. The shield at least partially surrounds the main pole with a continuously concave inner sidewall. The angle between the inner sidewall of the shield and the direction of motion of the write element is greater than the angle between the sides of the main pole and the direction of motion. 1. An apparatus comprising:a main pole having a pole sidewall connecting leading and trailing edges; anda shield having throat and mouth regions respectively separated from the main pole by different first and second distances, the mouth region positioned down-track from the throat region and leading edge of the main pole.2. The apparatus of claim 1 , wherein the first distance is less than the second distance.3. The apparatus of claim 1 , wherein the mouth and throat regions are defined by different first and second shield sidewalls.4. The apparatus of claim 3 , wherein the first shield sidewall is oriented at a different angle with respect to the pole sidewall than the second shield sidewall.5. The apparatus of claim 4 , wherein the first shield sidewall is oriented perpendicular to the leading edge of the main pole.6. The apparatus of claim 1 , wherein the throat region comprises a throat sidewall extending down-track from the leading edge of the main pole.7. The apparatus of claim 6 , wherein the mouth region comprises a mouth sidewall extending away from the leading edge and pole sidewall of the main pole.8. The apparatus of claim 1 , wherein a write gap between the main pole and shield varies between the throat and mouth regions.9. The apparatus of claim 8 , wherein the write gap between the mouth region and main pole is greater than the write gap between the throat region and main pole.10. The apparatus of claim 1 , wherein the throat and mouth regions are seamless claim 1 , continuous extensions of the shield.11. A magnetic ...

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Номер записи: 42
20-06-2013 дата публикации

METHODS FOR TEXTURING MAGNETIC HEAD SURFACE

Номер: US20130152381A1
Автор: Biskeborn Robert G., Hwang Cherngye, Liang Jason, Lo Calvin S.
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

A method according to one embodiment includes contacting an oxidant with an AlTiC portion of a magnetic head for recessing TiC grains of the AlTiC portion. A method according to another embodiment includes contacting a peroxide with an AlTiC portion of a magnetic head for recessing TiC grains of the AlTiC portion from a media bearing surface of the AlTiC portion. 1. A method , comprising:contacting an oxidant with an AlTiC portion of a magnetic head for recessing TiC grains of the AlTiC portion.2. A method as recited in claim 1 , wherein the oxidant is a peroxide.3. A method as recited in claim 1 , wherein the oxidant is selected from a group consisting of a hypohalite compound claim 1 , a halogen claim 1 , a halogen compound claim 1 , a permanganate salt claim 1 , ammonium cerium(IV) nitrate claim 1 , a hexavalent chromium compound claim 1 , Tollen's Reagent claim 1 , a sulfoxide claim 1 , persulfuric acid claim 1 , ozone claim 1 , osmium tetroxide (OsO) claim 1 , nitric acid claim 1 , nitrous oxide (NO).4. A method as recited in claim 1 , wherein the oxidant is present in a liquid composition claim 1 , wherein a reaction product of the TiC with oxidant dissolves into the liquid composition.5. A method as recited in claim 1 , wherein the TiC grains are recessed at least 5 nm from a media bearing surface of the AlTiC portion.6. A method as recited in claim 1 , wherein the TiC grains are recessed at least 10 nm from a media bearing surface of the AlTiC portion.7. A method claim 1 , comprising:contacting a peroxide with an AlTiC portion of a magnetic head for recessing TiC grains of the AlTiC portion from a media bearing surface of the AlTiC portion.8. A method as recited in claim 7 , wherein the peroxide is present in a liquid composition claim 7 , wherein a reaction product of the TiC with oxidant dissolves into the liquid composition.9. A method as recited in claim 7 , wherein the TiC grains are recessed at least 5 nm from the media bearing surface.10. A method as ...

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Номер записи: 43
27-06-2013 дата публикации

Magnetic head having high-frequency oscillatory elements and disk drive with the same

Номер: US20130163122A1
Автор: Katsuhiko Koui, Kenichiro Yamada, Masaya Ohtake, Masayuki Takagishi, Tomoko Taguchi
Принадлежит: Toshiba Corp

According to one embodiment, a magnetic head includes a main pole configured to apply a perpendicular recording magnetic field to a recording layer of a recording medium, a return pole opposed to the trailing side of the main pole with a write gap therebetween and configured to reflux magnetic flux from the main pole to form a magnetic circuit in conjunction with the main pole, a coil configured to excite magnetic flux in the magnetic circuit includes the main pole and the return pole, a plurality of high-frequency oscillatory elements individually interposed between the main pole and the return pole, includes a plurality of magnetic films different in magnetic resonance frequency, and configured to individually apply high-frequency magnetic fields to the recording medium, and an electrical circuit configured to energize the high-frequency oscillatory elements.

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Номер записи: 44
11-07-2013 дата публикации

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

Номер: US20130176644A1
Автор: Atsushi Iijima, Hironori Araki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Yoshitaka Sasaki
Принадлежит: Headway Technologies Inc, SAE Magnetics HK Ltd

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, a thin-film coil and a shield magnetic layer are laminated on a substrate. The thin-film magnetic head has a shield magnetic layer. This thin-film magnetic head has a hard guard frame layer surrounding an equidistant coil part, disposed at a position equidistant from the substrate, from outside and being in direct contact with almost a whole outside surface defining an outer shape of the equidistant coil part.

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Номер записи: 45
22-08-2013 дата публикации

Manufacturing method of a slider and manufacturing apparatus thereof

Номер: US20130212871A1
Автор: Cheukman LUI, CheukWing Leung, Chiuming Lueng, ChiYuen Mok, Juren Ding, Lorest Garcia Pingul, Mankit Lee, Rongkwang Ni, Yasutoshi Fujita
Принадлежит: SAE Magnetics HK Ltd

A manufacturing method of a slider includes steps of (a) providing a row bar with a plurality of slider elements connecting together, the row bar having an air bearing surface, a back surface opposite the air bearing surface, a bonding surface and a bottom surface opposite the bonding surface; (b) grinding the bottom surface of the row bar; (c) lapping the air bearing surface of the row bar so as to obtain a predetermined requirement, and applying a first magnetic field with a first direction during lapping the air bearing surface, and the first direction being parallel to the air bearing surface and the bonding surface; and (d) cutting the row bar into a plurality of individual sliders. The present invention can maintain a good performance of a magnetic head during the manufacturing process.

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Номер записи: 46
29-08-2013 дата публикации

MAGNETIC HEAD, METHOD FOR PRODUCING THE MAGNETIC HEAD, AND MAGNETIC RECORDING/REPRODUCING APPARATUS

Номер: US20130222941A1
Автор: Igarashi Masukazu, SATO Yo, Sugiura Kenji, WATANABE Katsuro
Принадлежит: Hitachi, Ltd.

In a magnetic head of a high-frequency magnetic field assisted recording system, a width of a high-frequency magnetic field from an oscillator is decreased to enhance an oscillation frequency, in order to realize a high-density recording. An oscillator provided near a main pole, which generates a recording magnetic field, for generating a high-frequency magnetic field is patterned by a conventional photolithography, and then, an oxidation, nitridation, or oxynitridation is performed on the side face in a track width direction. With this process, an oxide layer, a nitride layer, or an oxynitride layer, which is made of a material of the oscillator, is formed on the side face of the oscillator in the track width direction, and the shape of the oscillator is formed to be semi-circular. 1. A magnetic head comprising:a main pole that generates a recording magnetic field; andan oscillator that is provided close to the main pole for generating a high-frequency magnetic field, whereinthe oscillator has an oxide layer, a nitride layer, or an oxynitride layer, which is made of a material of the oscillator, on a side face in a track width direction.2. The magnetic head according to claim 1 , whereinthe oxide layer, the nitride layer, or the oxynitride layer has a width of 0.5 nm or more in the track width direction, and the width of the oscillator except for the oxide layer, the nitride layer, or the oxynitride layer in the track width direction is 10 nm or more and 60 nm or less.3. The magnetic head according to claim 1 , whereinthe oscillator covered by the oxide layer, the nitride layer, or the oxynitride layer has a semi-circular shape projecting toward an element height direction from an air bearing surface.4. A method for producing a magnetic head including a main pole that generates a recording magnetic field claim 1 , and an oscillator that is provided close to the main pole for generating a high-frequency magnetic field claim 1 , the method comprising:a step of ...

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Номер записи: 47
05-09-2013 дата публикации

Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive

Номер: US20130229895A1
Автор: Harukazu Miyamoto, Hiroshi Fukuda, Junko Ushiyama, Katsuro Watanabe, Masukazu Igarashi, Yoshihiro Shiroishi, Yoshiyuki Hirayama
Принадлежит: HITACHI LTD

A microwave assisted magnetic recording head includes a recording magnetic pole unit that produces a recording field for writing to a perpendicular magnetic recording medium, and a high-frequency magnetic field oscillator that produces a high-frequency magnetic field. The recording magnetic pole unit includes a magnetic core with a write gap portion at which a main recording field component is concentrated, and the high-frequency magnetic field oscillator is disposed in the write gap.

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Номер записи: 48
12-09-2013 дата публикации

Hamr nft materials with improved thermal stability

Номер: US20130235707A1
Автор: Michael Allen Seigler, Michael Christopher Kautzky, TONG Zhao, William Albert Challener
Принадлежит: SEAGATE TECHNOLOGY LLC

A near field transducer includes gold and at least one dopant. The dopant can include at least one of: Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo. The dopant concentration may be in a range from 0.5% and 30%. The dopant can be a nanoparticle oxide of V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th, or a nitride of Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B.

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Номер записи: 49
19-09-2013 дата публикации

MAGNETO-RESISTANCE EFFECT ELEMENT, MAGNETIC HEAD ASSEMBLY, MAGNETIC RECORDING AND REPRODUCING APPARATUS, AND MAGNETIC MEMORY

Номер: US20130242435A1
Автор: Fuji Yoshihiko, FUKUZAWA Hideaki, Hara Michiko, Yuasa Hiromi
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a magneto-resistance effect element includes: a first electrode; a second electrode; a first magnetic layer provided between the first and the second electrodes; a second magnetic layer provided between the first magnetic layer and the second electrode; and an oxide layer of a metal oxide provided between the first magnetic layer and the second magnetic layer. The oxide layer includes wustite crystal grains of a wustite structure with a (1 1 1) plane orientation containing iron. A lattice spacing of a (1 1 1) plane of the wustite crystal grains is not less than 0.253 nanometers and not more than 0.275 nanometers. 1. A magneto-resistance effect element comprising:a first electrode;a second electrode;a first magnetic layer provided between the first electrode and the second electrode;a second magnetic layer provided between the first magnetic layer and the second electrode; andan oxide layer of a metal oxide provided between the first magnetic layer and the second magnetic layer, the oxide layer including wustite crystal grains of a wustite structure with a (1 1 1) plane orientation containing iron, a lattice spacing of a (1 1 1) plane of the wustite crystal grains being not less than 0.253 nanometers and not more than 0.275 nanometers.2. The element according to claim 1 , further comprising a nonmagnetic layer provided between the first magnetic layer and the second magnetic layer.3. The element according to claim 1 , wherein the oxide layer further includes wurtzite crystal grains with a (0 0 2) plane orientation containing zinc and having a portion overlapping with the wustite crystal grains when projected onto a plane parallel to a thickness direction of the oxide layer.4. The element according to claim 1 , wherein the wustite crystal grains further contain zinc.5. The element according to claim 1 , wherein the wustite crystal grains further contain at least one of cobalt and nickel.6. The element according to claim 1 , wherein the ...

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Номер записи: 50
19-09-2013 дата публикации

Systems and methods for correcting slider parallelism error using compensation lapping

Номер: US20130244541A1
Автор: Chakkrit Supavasuthi, Theera Yaemglin
Принадлежит: Western Digital Technologies Inc

Systems and methods for correcting slider parallelism error using compensation lapping are described. One such system includes a lapping support including at least one mounting surface having a preselected mounting angle such that a line normal to the at least one mounting surface is not parallel to a centerline of the lapping support, a rowbar including a plurality of magnetic transducers spaced apart along a length of the rowbar, and a lapping plate configured to lap the rowbar, where the rowbar is mounted to the at least one mounting surface, and where the rowbar is configured to be brought into contact with the lapping plate.

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Номер записи: 51
17-10-2013 дата публикации

MICROWAVE ASSISTED MAGNETIC RECORDING HEAD HAVING SPIN TORQUE OSCILLATOR, AND MAGNETIC RECORDING APPARATUS

Номер: US20130271866A1
Автор: SATO Yo
Принадлежит: Hitachi, Ltd.

A spin torque oscillator generates a strong high-frequency magnetic field stably and has high reliability. A magnetic recording head includes a main magnetic pole and a spin torque oscillator. A magnetization control layer is antiferromagnetically coupled via a non-magnetic coupling layer with an interface contacting a high-frequency magnetic field generation layer of the spin torque oscillator. 1. A microwave assisted magnetic recording head comprising:a main magnetic pole; anda spin torque oscillator,wherein the spin torque oscillator includes a high-frequency magnetic field generation layer antiferromagnetically coupled with a magnetization control layer via a non-magnetic coupling layer.2. The microwave assisted magnetic recording head according to claim 1 , wherein the magnetization control layer is a perpendicular magnetic anisotropy film with a magnetic easy axis in a direction perpendicular to a film plane.3. The microwave assisted magnetic recording head according to claim 1 , wherein the non-magnetic coupling layer includes at least one material selected from Ru and Ru—Fe.4. The microwave assisted magnetic recording head according to claim 1 , wherein the spin torque oscillator includes an underlayer claim 1 , a spin injection layer claim 1 , a spin conduction layer claim 1 , the high-frequency magnetic field generation layer claim 1 , the non-magnetic coupling layer claim 1 , the magnetization control layer claim 1 , and a capping layer which are stacked on the main magnetic pole in the recited order.5. The microwave assisted magnetic recording head according to claim 1 , wherein the spin torque oscillator includes an underlayer claim 1 , the magnetization control layer claim 1 , the non-magnetic coupling layer claim 1 , the high-frequency magnetic field generation layer claim 1 , a spin conduction layer claim 1 , a spin injection layer claim 1 , and a capping layer which are stacked on the main magnetic pole in the recited order.6. The microwave assisted ...

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Номер записи: 52
17-10-2013 дата публикации

Magnetic Head Suspension

Номер: US20130271875A1
Автор: Eiji Okuda, Yasuo Fujimoto
Принадлежит: Suncall Corp

Assuming that a length in the suspension longitudinal direction between a distal edge of a supporting part and a dimple is represented by “L”, plural load beam part welding points at which spot welding are made for fixing a load beam part fixed region of a flexure base plate to a plate-like main body portion of a load beam part include paired right and left main welding points that are arranged symmetrically to each other with respect to a suspension longitudinal center line and that are disposed within a center region away from the distal edge of the supporting part by more than or equal to 0.4*L and less than or equal to 0.6*L.

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Номер записи: 53
24-10-2013 дата публикации

MAGNETIC HEAD, MAGNETIC HEAD ASSEMBLY, MAGNETIC RECORDING AND REPRODUCING APPARATUS, AND METHOD FOR MANUFACTURING MAGNETIC HEAD

Номер: US20130279046A1
Автор: IWASAKI Hitoshi, TAKAGISHI Masayuki
Принадлежит:

According to one embodiment, a magnetic head includes a reproducing unit to detect a medium magnetic field recorded in a magnetic recording medium. The reproducing unit includes first and second magnetic shields, a stacked body, and a side wall film. The stacked body is provided between the first and second magnetic shields and includes first and second magnetic layer and an intermediate layer provided between them. The stacked body has a side wall. The side wall intersects a plane perpendicular to a stacking direction from the first magnetic shield toward the second magnetic shield. The side wall film covers at least a part of the side wall of the stacked body. The side wall film includes at least one of Fe and Co, and has a composition different from a composition of the first magnetic layer and different from a composition of the second magnetic layer. 1. A magnetic head comprising a reproducing unit configured to detect a medium magnetic field recorded in a magnetic recording medium , a first magnetic shield;', 'a second magnetic shield;', 'a stacked body provided between the first magnetic shield and the second magnetic shield, the stacked body including a first magnetic layer, a second magnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer, the stacked body having a side wall, the side wall intersecting a plane perpendicular to a stacking direction from the first magnetic shield toward the second magnetic shield; and', 'a side wall film covering at least a part of the side wall of the stacked body, the side wall film including at least one of Fe and Co, and having a composition different from a composition of the first magnetic layer and different from a composition of the second magnetic layer., 'the reproducing unit including2. The head according to claim 1 , wherein the side wall film includes at least one of oxygen claim 1 , nitrogen claim 1 , and carbon.3. The head according to claim 1 , wherein ...

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Номер записи: 54
24-10-2013 дата публикации

BONDING AGENT FOR HEAT-ASSISTED MAGNETIC RECORDING AND METHOD OF APPLICATION

Номер: US20130279312A1
Автор: Elledge Jason Boyd, Hurley Jon Paul
Принадлежит: SEAGATE TECHNOLOGY LLC

Magnetic write heads for heat-assisted magnetic recording (HAMR) are disclosed that include a laser diode having a light emitting edge or surface mounted on a slider, an optical waveguide, and a printed bonding agent disposed in an air gap between the laser diode and the slider. The printed bonding agent can be applied by ink jet printing or aerosol jet printing. Also included is a method that includes attaching a laser diode to a slider of a magnetic write head and depositing a bonding agent into the air gap using a focused stream of bonding agent. A light-emitting edge or surface of the laser diode is adjacent to an optical waveguide. The light-emitting edge or surface of the laser diode and the optical input of the waveguide define an aligned direction and an air gap extends from the light-emitting edge or surface of the laser diode in a direction perpendicular to the aligned direction. The bonding agent can be applied by ink jet printing or aerosol jet printing. 1. A magnetic write head comprising:a laser diode having a light-emitting edge or surface mounted on a slider;an optical waveguide; anda printed bonding agent disposed in an air gap between the laser diode and the slider.2. A magnetic write head according to claim 1 , wherein the printed bonding agent is applied by ink jet printing or aerosol jet printing.3. A magnetic write head according to claim 2 , wherein the printed bonding agent is applied by aerosol jet printing.4. A magnetic write head according to claim 1 , wherein the laser diode claim 1 , optical waveguide claim 1 , and bonding agent are components of a laser-on-slider device.5. A magnetic write head according to claim 1 , wherein the laser diode claim 1 , optical waveguide claim 1 , and bonding agent are components of a laser-in-slider device.6. A magnetic write head according to claim 1 , wherein the bonding agent comprises a dielectric or adhesive.7. A magnetic write head according to claim 6 , wherein the bonding agent has an average ...

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Номер записи: 55
24-10-2013 дата публикации

MAGNETIC RECORDING MEDIA WITH SOFT MAGNETIC UNDERLAYERS

Номер: US20130280556A1
Автор: Lee Li-Lien, Liu Connie Chunling, Nolan Thomas P., Rou Shanghsien, Tang Li, Xu Weilu, Xue Jianhua, Zheng Youfeng
Принадлежит:

Provided herein, is an apparatus that includes a nonmagnetic substrate having a surface; and a plurality of overlying thin film layers forming a layer stack on the substrate surface. The layer stack includes a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), wherein the sum of a magnetic thickness of the layer stack is a magnetic thickness of up to about 2 memu/cm̂2. 1. An apparatus comprising:a non-magnetic substrate having a surface; anda plurality of overlying thin film layers forming a layer stack on the substrate surface, the layer stack including a magnetically hard perpendicular magnetic recording layer structure and an underlying soft magnetic underlayer (SUL), wherein:the sum of a magnetic thickness of the layer stack is a magnetic thickness of up to about 2 memu/cm̂2.2. The apparatus of claim 1 , wherein:the magnetically hard perpendicular magnetic recording layer structure comprises a multilayer structure.3. The apparatus of claim 2 , wherein:the multilayer structure comprises a granular perpendicular magnetic recording layer wherein the magnetic grains are only weakly exchange coupled together, and an overlying continuous perpendicular magnetic recording layer wherein the magnetic grains are strongly exchange coupled laterally together.4. The apparatus of claim 3 , wherein:the granular perpendicular magnetic recording layer and the continuous perpendicular magnetic recording layer are ferromagnetically coupled together to form a coupled granular-continuous (CGC) structure.5. The apparatus of claim 3 , wherein:the granular perpendicular magnetic recording layer is from about 5 to about 30 nm thick and comprised of a Co-based alloy wherein segregation of magnetic grains occurs via formation of oxides, nitrides, or carbides at the boundaries between adjacent grains.6. The apparatus of claim 3 , wherein:the continuous perpendicular magnetic recording layer is from about 2 to about 15 nm ...

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Номер записи: 56
31-10-2013 дата публикации

TAPERED POLE HEADS FOR MAGNETIC MEDIA

Номер: US20130286504A1
Автор: Johnson Douglas W., Rothermel Stephen J.
Принадлежит: Imation Corp.

A system comprises a first tapered core configured for positioning adjacent a first surface of a magnetic medium, and a second tapered core configured for positioning adjacent a second surface of the magnetic medium, opposite the first tapered core along a travel direction of the magnetic medium. Each of the first and second tapered cores has a transverse width defined with respect to the magnetic medium, where the transverse width decreases from a first end of the tapered core to a second end of the tapered core, the second end forming a pole face adjacent the magnetic medium. 1. A system comprising:a first tapered core positioned near a first surface of a magnetic medium;a second tapered core positioned near a second surface of the magnetic medium, the second tapered core positioned opposite the first tapered core along a travel direction of the magnetic medium;wherein each of the first and second tapered cores has a transverse width defined with respect to the magnetic medium, the transverse width decreasing from a first end of the tapered core to a second end of the tapered core, the second end forming a pole face adjacent the magnetic medium.2. The system of claim 1 , wherein each of the tapered cores has a longitudinal flux density claim 1 , the longitudinal flux density increasing from the first end of the tapered core to the pole face.3. The system of claim 2 , wherein the transverse widths of the first and second tapered cores decrease along a travel direction of the magnetic medium.4. The system of claim 2 , wherein the pole faces of the first and second tapered cores extend transversely from the first and second surfaces of the magnetic medium.5. The system of claim 4 , wherein the pole faces of the first and second tapered cores are substantially aligned along the travel direction.6. The system of claim 1 , wherein the transverse width of at least one of the first and second tapered cores decreases substantially linearly along the magnetic medium.7. The ...

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Номер записи: 57
31-10-2013 дата публикации

SERVO WRITE HEAD

Номер: US20130286506A1
Автор: Rothermel Stephen J.
Принадлежит: Imation Corp.

An assembly comprises a plurality of laterally spaced front blocks, a magnetic post coupling each of the front blocks to a common back bar, and a common front bar magnetically coupled to the back bar. A write gap spacer is positioned between the front bar and each of the plurality of front blocks, and a write gap element comprising write gaps couples the front bar to each front block across the write gap spacer. A coil is configured to generate magnetic flux in each magnetic post, and the front blocks are configured to direct the magnetic flux across the write gaps. 1. An assembly comprising:a plurality of laterally spaced front blocks;a magnetic post coupling each of the front blocks to a back bar;a front bar magnetically coupled to the back bar;a write gap spacer positioned between the front bar and each of the plurality of front blocks;a write gap element coupling the front bar to each front block across the write gap spacer, the write gap element comprising write gaps; anda coil configured to generate magnetic flux in each magnetic post, wherein the front blocks direct the magnetic flux across the write gaps of each write gap element.2. The assembly of claim 1 , further comprising a plurality of laterally spaced intermediate blocks positioned between the laterally spaced front blocks claim 1 , wherein the intermediate blocks are magnetically coupled to the front bar and substantially decoupled from the back bar.3. The assembly of claim 2 , further comprising block spacers positioned between the plurality of laterally spaced front blocks and the plurality of laterally spaced intermediate blocks claim 2 , wherein the block spacers substantially decouple each intermediate block from each coil.4. A system comprising a magnetic medium positioned adjacent the assembly of .5. The system of claim 4 , wherein the plurality of laterally spaced front blocks define servo bands along the magnetic medium.6. A magnetic medium having at least four servo bands written by the ...

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Номер записи: 58
31-10-2013 дата публикации

Perpendicular Magnetic Recording Write Head with Milling Defined Track Width

Номер: US20130286508A1
Автор: Li Min, Smyth Joe, Takano Kenichi, Zhou Yuchen
Принадлежит:

A main pole layer having at least a leading taper and trimmed pole tip portion is described. The leading taper increases head field up to ≧15000 Oe even for narrow track widths approaching 50 nm. For MAMR applications, a STO and trailing shield are sequentially formed on a trailing pole tip side. Furthermore, full side shields may be added to reduce fringing field. A preferred embodiment includes both of a leading taper and trailing taper at the pole tip where leading taper angle is between 20° and 60° and trailing taper angle is from 10° to 45°. A method is provided for forming various embodiments of the present invention. A key feature is that milling depth at an effective neck height distance is greater than or equal to the pole tip thickness. A self aligned STO may be formed by the same ion milling step that defines track width. 1. A PMR write head with a main pole layer having a planar top surface that is connected to an air bearing surface (ABS) by a tapered trailing side , and a planar bottom surface that is formed parallel to said planar top surface and connected to the ABS by a tapered leading side , said main pole layer comprises: (1) a pole tip formed along the ABS and having a leading edge where the tapered leading side terminates, and a trailing edge at the ABS where the tapered trailing side terminates, said trailing edge is located a pole tip thickness from the leading edge and has a track width in a cross-track direction;', '(2) a top surface that is part of the tapered trailing side and extends from said trailing edge to a first plane that is parallel to the ABS and is formed a neck height distance from the ABS;', '(3) two sides that are separated by a track width distance along the pole tip top surface, and connect the top surface to a pole tip bottom surface; and', '(4) the pole tip bottom surface that is part of the tapered leading side and having a first section formed along the tapered leading side between the ABS and a main pole surface that ...

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Номер записи: 59
31-10-2013 дата публикации

PERPENDICULAR MAGNETIC RECORDING HEADS INCLUDING COMPONENTS MADE OF NICKEL ALLOYS

Номер: US20130286509A1
Автор: Rejda Edwin, Sahoo Sarbeswar
Принадлежит:

A magnetic device including a write pole, a magnetic reader, or both; and one or more shields adjacent at least a portion of the write pole or the magnetic reader, or both, wherein at least a portion of the one or more shields includes or is made from NiX, wherein X is chosen from: Ru, Re, Zr, Cr, and Cu; and a is the atomic percent of the element X, and can range from about 20 to about 90. 1. A magnetic device comprising:a write pole; and{'sub': 100-a', 'a, 'one or more shields adjacent at least a portion of the write pole, wherein at least a portion of the one or more shields comprises NiX, wherein X is chosen from: Ru, Re, Zr, Cr, and Cu; and a is the atomic percent of the element X, and can range from about 20 to about 90.'}2. The magnetic device according to claim 1 , wherein the one or more shields comprises a front shield claim 1 , a first side shield claim 1 , a second side shield claim 1 , or a combination thereof.3. The magnetic device according to claim 1 , wherein at least one of the one or more shields comprises a seed layer.4. The magnetic device according to claim 1 , wherein the one or more shields is selected from:a front shield, the front shield comprising a front shield seed layer;a first side shield, the first side shield comprising a first side shield seed layer;a second side shield, the second side shield comprising a second side shield seed layer; ora combination thereof.5. The magnetic device according to claim 1 , wherein the one or more shields function to encapsulate the write pole.6. The magnetic device according to claim 1 , wherein X is Ru.7. The magnetic device according to claim 6 , wherein a is from about 40 to about 80.8. The magnetic device according to claim 1 , wherein X is Cr.9. The magnetic device according to claim 8 , wherein a is from about 30 to about 60.10. A magnetic device comprising:a magnetic reader; and{'sub': 100-a', 'a, 'one or more shields adjacent at least a portion of the magnetic reader, wherein at least a ...

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Номер записи: 60
28-11-2013 дата публикации

Recording head and disk device including the same

Номер: US20130314818A1
Автор: Kenichiro Yamada, Noayuki Narita, Takuya Maatsumoto
Принадлежит: Individual

A recording head includes a main magnetic pole generating a recording magnetic field in a direction perpendicular to a recording medium, a write shield magnetic pole facing a trailing side of the main magnetic pole, a recording coil exciting a magnetic flux in a magnetic circuit, and a spin torque oscillator provided between the main magnetic pole and the write shield magnetic pole. The main magnetic pole includes a trailing side end surface that faces the spin torque oscillator and is tilted toward a leading side of the recording head with respect to the direction perpendicular to the recording medium, and the spin torque oscillator has layers with tilted surfaces that are substantially in parallel with the trailing side end surface.

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Номер записи: 61
28-11-2013 дата публикации

Compositions and Methods for Altering Tocotrienol Content

Номер: US20130316457A1
Автор: Edgar B. Cahoon, Karlene H. Butler, Rebecca E. Cahoon, Sean J. Coughlan
Принадлежит: EI Du Pont de Nemours and Co

The invention provides isolated nucleic acids and their encoded polypeptides that alter tocol content in seeds. The invention further provides expression cassettes, host cells and transformed plants containing the nucleic acids. The present invention further provides methods for altering tocol content in seeds.

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Номер записи: 62
05-12-2013 дата публикации

SERVO CONTROL

Номер: US20130321949A1
Автор: Cherubini Giovanni, JELITTO Jens, Lantz Mark A.
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

A tape head includes a set of one or more segments, wherein each segment of the set is individually movable with respect to a frame; each segment of the set comprising at least one of a write element configured to write data to a tape and a read element configured to read data from the tape; and each segment of the set comprising a further read element having a width transverse to a motion direction of the tape being at least a width of the write element of the segment or, in the event that no write element is comprised in the segment, of a write element of a different segment. 1. A tape head , comprising:a set of one or more segments, wherein each segment of the set is individually movable with respect to a frame;each segment of the set comprising at least one of a write element configured to write data to a tape and a read element configured to read data from the tape; andeach segment of the set comprising a further read element having a width transverse to a motion direction of the tape being at least a width of the write element of the segment or, in the event that no write element is comprised in the segment, of a write element of a different segment.2. The tape head according to claim 1 , wherein the width of the further read element of each segment of the set is at least twice the width of the write element of the segment or claim 1 , in case that no write element is comprised in the segment claim 1 , of a write element of a different segment.3. The tape head according to claim 1 , wherein:the further read element of at least one of the segments of the set is adapted for reading servo patterns from a data band of the tape;the further read element of at least one of the segments of the set is offset in a direction transverse to the motion direction of the tape from at least one of the read element and the write element; andthe one or more segments of the set are movably mounted with respect to the frame of the tape head for taking different positions ...

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Номер записи: 63
05-12-2013 дата публикации

MAGNETIC STRUCTURE FREE LAYER STABILIZATION

Номер: US20130321954A1
Автор: Singleton Eric Walter, Tsoukatos Antonia
Принадлежит: SEAGATE TECHNOLOGY LLC

A magnetic layered structure is presently disclosed comprising a pinned layer, a first anti-ferromagnetic layer that defines a magnetic orientation of the pinned layer, a free layer, a second anti-ferromagnetic layer that biases the free layer to a magnetic orientation approximately perpendicular to the magnetic orientation of the pinned layer, and a tuning layer positioned between and in contact with the second anti-ferromagnetic layer and the free layer that tunes free layer bias to a desired level. 1. A magnetic layered structure comprising:a pinned layer;a first anti-ferromagnetic layer that defines a magnetic orientation of the pinned layer;a free layer;a second anti-ferromagnetic layer that biases the free layer to a magnetic orientation approximately perpendicular to the magnetic orientation of the pinned layer; anda tuning layer positioned between and in contact with the second anti-ferromagnetic layer and the free layer, wherein the tuning layer tunes free layer bias to greater than 250 Oresteds (Oe).2. The magnetic layered structure of claim 1 , further comprising:one or more side shields positioned adjacent the free layer along a major plane of the free layer.3. The magnetic layered structure of claim 2 , wherein the side shields include a soft magnetic material.4. The magnetic layered structure of claim 2 , wherein the side shields include a non-magnetic material.5. The magnetic layered structure of claim 1 , further comprising:two electrodes, each positioned on opposite sides of the layered structure, configured to conduct current through the layered structure along an axis approximately perpendicular to a major plane of the free layer.6. The magnetic layered structure of claim 1 , further comprising:a spacer layer that magnetically separates the pinned layer from the free layer.7. The magnetic layered structure of claim 1 , further comprising:a capping layer that protects the second anti-ferromagnetic layer from post deposition damage.8. The magnetic ...

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Номер записи: 64
05-12-2013 дата публикации

Low-Recess Write Pole Coil Near Shield at Media-Facing Surface

Номер: US20130321955A1
Автор: Benakli Mourad, Qiu Jiaoming, Rivkin Kirill Aleksandrovich, Shen Zhe, Yin Huaqing
Принадлежит: SEAGATE TECHNOLOGY LLC

An apparatus includes a write pole magnetically coupled to write coils that generate a first magnetic field during a switching event. The apparatus includes a shield at a media-facing surface and proximate the write pole. A conductive element is disposed proximate the shield and configured to generate a second magnetic field opposite to the first magnetic field during the switching event. A selected one of the write coils is located adjacent the shield separate from others of the write coils. 1. An apparatus comprising:a write pole magnetically coupled to write coils that generate a first magnetic field during a switching event;a shield at a media-facing surface and proximate the write pole; anda conductive element disposed proximate the shield and configured to generate a second magnetic field opposite to the first magnetic field during the switching event, wherein a selected one of the write coils is located adjacent the shield separate from others of the write coils.2. The apparatus of claim 1 , wherein a first number of the write coils on the first side of the write pole is different than a second number of the write coils on a second side of the write pole.3. The apparatus of claim 1 , wherein the selected write coil is between the write pole and the shield.4. The apparatus of claim 3 , wherein the shield comprises a canted portion oriented at an angle relative to the media-facing surface claim 3 , and wherein the conductive element is located adjacent a surface of the canted portion that faces away from the write pole.5. The apparatus of claim 1 , wherein the selected write coil is on a side of the write pole opposite the shield.6. The apparatus of claim 5 , wherein the conductive element is adjacent a surface of the shield that faces away from the media-facing surface.7. The apparatus of claim 1 , wherein the selected write coil comprises an elongated cross section that minimizes coupling between the selected write coil and the conductive element.8. The ...

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Номер записи: 65
05-12-2013 дата публикации

MAGNETIC HEAD AND MAGNETIC RECORDING/REPRODUCTION APPARATUS USING THE SAME

Номер: US20130321956A1
Автор: Shiimoto Masato, Sugiyama Mikito
Принадлежит: Hitachi, Ltd.

A magnetic recording head enabling both enhancement of a strength of a magnetic field from a main pole and provision of narrow-track recording to achieve a high recording density in a high-frequency magnetic field-assisted recording method is provided. An oscillator that generates a high-frequency magnetic field is provided on the trailing side of a main pole , and viewed from the air bearing surface side, a ratio Pw/Two between a track width Pw of a trailing-side edge portion of the main pole and a track width Two of a leading-side edge portion of the oscillator is no less than 0.85 and no more than 1.25, and the main pole includes a part having a track width larger than Pw between the trailing-side edge portion and a leading-side edge portion of the main pole. 1. A magnetic head comprising:a main pole that generates a recording magnetic field; andan oscillator provided adjacent to the main pole on a trailing side of the main pole, the oscillator generating a high-frequency magnetic field; {'br': None, 'i': Two Подробнее

Номер записи: 66
05-12-2013 дата публикации

ATTACHING OPTICAL COMPONENTS USING HOMOGENIZED LASER LIGHT

Номер: US20130322822A1
Автор: Roeger Brent C., Tatah Karim
Принадлежит:

An attachable optical component is aligned with a base optical component. The attachable optical component has a mounting surface interfacing with the base optical component and an exposed surface opposed to the mounting surface. Laser light is directed to the exposed surface of the attachable optical component for delivery to the mounting surface. The attachable optical component guides and homogenizes the laser light delivered to the mounting surface and uniformly heats a bonding feature between the mounting surface and the base optical component. The directing and subsequent removing of the laser light bonds the attachable optical component to the base optical component via the bonding feature 1. A method comprising:aligning an attachable optical component with a base optical component, the attachable optical component having a mounting surface interfacing with the base optical component and an exposed surface opposed to the mounting surface;directing laser light to the exposed surface of the attachable optical component for delivery to the mounting surface, wherein the attachable optical component guides and homogenizes the laser light delivered to the mounting surface and uniformly heats a bonding feature between the mounting surface and the base optical component; andremoving the laser light from the exposed surface, wherein the directing and removing of the laser light bonds the attachable optical component to the base optical component via the bonding feature.2. The method of claim 1 , wherein the attachable optical component comprises a laser submount and the base optical component comprises a slider body.3. The method of claim 2 , wherein aligning the attachable optical component with the base optical component comprises aligning a laser diode mounted on the laser submount with a waveguide coupler of the slider body.4. The method of claim 1 , wherein the uniform heating of the bonding feature reduces thermal expansion of tooling used to align the ...

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Номер записи: 67
12-12-2013 дата публикации

MICROWAVE ASSISTED MAGNETIC RECORDING HEAD AND MAGNETIC DATA STORAGE APPARATUS

Номер: US20130329316A1
Автор: Igarashi Masukazu, WATANABE Katsuro
Принадлежит:

To suppress a spread of not only a recording magnetic field generated from a main pole but also a high-frequency magnetic field generated from a spin torque oscillator in a microwave assisted magnetic recording head. The main pole and the spin torque oscillator are surrounded by a trailing shield layer and are also surrounded by a side/leading shield layer with an insulator sidegap layer interposed therebetween, and a high-frequency magnetic field shield layer, which absorbs a high-frequency magnetic field generated from the spin torque oscillator, is arranged in at least part of the shield layers. 1. A magnetic head comprising:a main pole configured to generate a recording magnetic field;a spin torque oscillator arranged around the main pole and configured to generate a high-frequency magnetic field; anda shield layer arranged in a manner surrounding the main pole and the spin torque oscillator, whereinthe shield layer partially includes a high-frequency magnetic field shield layer, the high-frequency magnetic field shield layer including a material that absorbs the high-frequency magnetic field.2. The magnetic head according to claim 1 , wherein the high-frequency magnetic field shield layer includes a hard magnetic material.3. The magnetic head according to claim 2 , wherein the hard magnetic material is one of a Co—Pt-based alloy claim 2 , a Co—Cr—Pt-based alloy claim 2 , or a Co—Ta—Pt-based alloy.4. The magnetic head according to claim 2 , wherein the high-frequency magnetic field shield layer is arranged on track width sides with respect to the spin torque oscillator.5. The magnetic head according to claim 2 , wherein the high-frequency magnetic field shield layer is arranged on a trailing side with respect to the spin torque oscillator.6. The magnetic head according to claim 2 , further comprising a read sensor for reading magnetic information claim 2 , wherein the high-frequency magnetic field shield layer is arranged between the spin torque oscillator and ...

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Номер записи: 68
12-12-2013 дата публикации

Magnetic Recording Head and Magnetic Recording Apparatus

Номер: US20130329317A1
Автор: AKIYAMA Junichi, FUNAYAMA Tomomi, IWASAKI Hitoshi, Kai Tadashi, Murakami Shuichi, SHIMIZU Mariko, TAKAGISHI Masayuki, TAKASHITA Masahiro, YAMADA Kenichiro
Принадлежит: KABUSHIKI KAISHA TOSHIBA

An example magnetic writing head includes a main magnetic pole and a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field. The laminated body includes a first magnetic layer, and a second magnetic layer. 1. A magnetic writing head comprising:a main magnetic pole;a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field; and a first magnetic layer, and', 'a second magnetic layer., 'a laminated body including2. The magnetic writing head according to claim 1 , wherein the first magnetic layer and the second magnetic layer are laminated substantially perpendicular to a medium moving direction.3. The magnetic writing head according to claim 1 , wherein the first magnetic layer and the second magnetic layer are laminated substantially parallel to a medium moving direction.4. The magnetic writing head according to claim 1 , further comprising a shield claim 1 , wherein the laminated body is sandwiched between the shield and the main magnetic pole.5. The magnetic writing head according to claim 4 , wherein the coercivity of the first magnetic layer is lower than the coercivity of the second magnetic layer claim 4 , and a current is passed from the second magnetic layer to the first magnetic layer via the main magnetic pole and the shield.6. The magnetic writing head according to claim 1 , wherein the laminated body further includes a third magnetic layer provided between one of a pair of electrodes and the first magnetic layer claim 1 , the electrode is located at the opposite side of the first magnetic layer as the second magnetic layer claim 1 , and the third magnetic layer has a coercivity lower than the magnetic field applied by the main magnetic pole.7. The magnetic writing head according to claim 1 , wherein the main magnetic pole can be worked as an electrode.8. The magnetic ...

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Номер записи: 69
19-12-2013 дата публикации

MICROWAVE ASSISTED MAGNETIC RECORDING AND MAGNETIC STORAGE DEVICE

Номер: US20130335847A1
Автор: SHIROISHI Yoshihiro
Принадлежит:

Disclosed is a technique of providing a large-capacity magnetic storage device at high device manufacturing yield while keeping the reliability, the magnetic storage device enabling recording on a perpendicular magnetic recording medium having distribution of characteristics in the circumferential direction as well at high track density of 500 kTPI or more that would be expected from the average characteristics of the medium. A recording condition from is selected for each sector from a parameter table that stores a set of at least two types of recording conditions by a microwave assisted magnetic recording head including a magnetic recording pole and a high-frequency magnetic field oscillator in the magnetic storage device, and information is recorded for each sector based on the condition. 1. A magnetic recording method , comprising the steps of:acquiring a recording condition on a perpendicular magnetic recording medium including sectors and having distribution of characteristics, the recording condition being for each sector and depending on the distribution of characteristics;setting a recording current and/or a driving current to be applied to a microwave assisted magnetic recording head for each sector in accordance with the recording condition, the microwave assisted magnetic recording head including a magnetic recording pole and a high-frequency magnetic field oscillator, the recording current exciting the magnetic recording pole and the driving current being applied to the high-frequency magnetic field oscillator; andperforming a recording operation with the set recording current and driving current.2. The magnetic recording method according to claim 1 , wherein the sectors include: a sector to be recorded with a first recording current and a first driving current and a sector to be recorded with a second recording current larger than the first recording current and a second driving current larger than the first driving current in accordance with the ...

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Номер записи: 70
02-01-2014 дата публикации

MAGNETIC RECORDING HEAD, AND DISK DRIVE COMPRISING THE SAME

Номер: US20140002924A1
Автор: KOUI Katsuhiko, Matsumoto Takuya, NARITA Naoyuki, TAGUCHI Tomoko, TAKEO Akihiko, YAMADA Kenichiro
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a magnetic recording head includes a disk-facing surface configured to face a recording layer of a recording medium, a main magnetic pole includes a distal end located on the disk-facing surface and configured to apply a recording magnetic field to the recording layer of the recording medium, a leading shield on a leading side of the main magnetic pole, opposed to the distal end of the main magnetic pole across a gap, a high-frequency oscillator between the leading shield and the distal end of the main magnetic pole, and a recording coil configured to excite the main magnetic pole with a magnetic field. 1. A magnetic recording head comprising:a disk-facing surface configured to face a recording layer of a recording medium;a main magnetic pole comprising a distal end located on the disk-facing surface and configured to apply a recording magnetic field to the recording layer of the recording medium;a leading shield on a leading side of the main magnetic pole, opposed to the distal end of the main magnetic pole across a gap;a high-frequency oscillator between the leading shield and the distal end of the main magnetic pole; anda recording coil configured to excite the main magnetic pole with a magnetic field.2. The magnetic head of claim 1 , wherein the leading shield comprises a distal on the leading side of the magnetic pole claim 1 , opposed to the distal end of the magnetic pole across a gap claim 1 , and a connecting portion connected to a part of the main magnetic pole located apart from the disk-facing surface claim 1 , and the leading shield forms a magnetic core together with the main magnetic pole.3. The magnetic head of claim 2 , wherein the connecting portion comprises a nonconductor.4. The magnetic head of claim 3 , further comprising a trailing head opposed to a trailing side of the distal end of the main magnetic pole across a write gap.5. The magnetic head of claim 4 , wherein a ratio of length TSW of a part of the trailing ...

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Номер записи: 71
02-01-2014 дата публикации

MAGNETIC RECORDING HEAD INCLUDING A HIGH-FREQUENCY OSCILLATOR AND DISK DRIVE WITH THE SAME

Номер: US20140002925A1
Автор: NARITA Naoyuki, Tomoda Yusuke, YAMADA Kenichiro
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a magnetic recording head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, and a high-frequency oscillator disposed adjacent to the main pole and near a air-bearing surface which faces the recording medium. The high-frequency oscillator includes a lower end surface located nearest to the air-bearing surface and an upper end surface located farthest from the air-bearing surface. A length of the lower end surface in a cross track direction is longer than a length of the upper end surface in the cross track direction. 1. A magnetic recording head comprising:a main pole configured to apply a recording magnetic field to a recording layer of a recording medium; anda high-frequency oscillator disposed adjacent to the main pole and near a air-bearing surface which faces the recording medium,the high-frequency oscillator comprising a lower end surface located nearest to the air-bearing surface and an upper end surface located farthest from the air-bearing surface, a length of the lower end surface in a cross track direction being longer than a length of the upper end surface in the cross track direction.2. The magnetic recording head of claim 1 , wherein the high-frequency oscillator comprises opposite side surfaces extending from the lower end surface to the upper end surface claim 1 , at least one of the side surfaces being inclined relative to a direction perpendicular to the air-bearing surface.3. The magnetic recording head of claim 2 , wherein the high-frequency oscillator is trapezoidal.4. The magnetic recording head of claim 2 , wherein the side surfaces are curved surfaces.5. The magnetic recording head of claim 4 , further comprising a shield pole opposed to the main pole with a gap therebetween claim 4 , wherein the high-frequency oscillator is located between the main pole and the shield pole.6. The magnetic recording head of claim 1 , further comprising a shield pole ...

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Номер записи: 72
02-01-2014 дата публикации

Magnetic head pole including laminated structure having magnetic and nonmagnetic layers

Номер: US20140002926A1
Автор: Hitoshi Iwasaki, Katsuhiko Koui, Kenichiro Yamada, Masayuki Takagishi, Takuya Matsumoto
Принадлежит: Toshiba Corp

According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

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Номер записи: 73
02-01-2014 дата публикации

CURRENT-PERPENDICULAR-TO-PLANE (CPP) READ SENSOR WITH Co-Fe BUFFER LAYERS

Номер: US20140004383A1
Автор: Lin Tsann
Принадлежит: HGST NETHERLANDS B.V.

A current-perpendicular-to-plane (CPP) read sensor with Co—Fe buffer layers is proposed to improve pinning and magnetoresistance properties. The read sensor comprises first and second Co—Fe buffer layers in the lower and upper portions of a keeper layer structure, respectively, third and fourth Co—Fe buffer layers in the lower and upper portion of a reference layer structure, respectively, and a fifth Co—Fe buffer layer in the lower portion of a sense layer structure. The first buffer layer is adjacent to a pinning layer and has a specific composition to improve unidirectional-anisotropy pinning properties. The second and third buffer layers are adjacent to an antiparallel-coupling layer and have specific compositions to improve bidirectional-anisotropy pinning properties. The fourth and fifth buffer layers are adjacent to a barrier or spacer layer and have specific compositions to improve magnetoresistance properties. 1. A read sensor , comprising:a non-magnetic barrier or spacer layer sandwiched between upper and lower sensor stacks, the upper sensor stack comprising a magnetic sense layer structure, the lower sensor stack comprising a pinning layer, a keeper layer structure formed on the pinning layer, a non-magnetic antiparallel coupling layer formed on the keeper layer and a reference layer structure formed on the non-magnetic antiparallel coupling layer, wherein:the keeper layer structure comprises a Co—Fe buffer layer adjacent to the pinning layer, a second Co—Fe buffer layer adjacent to the non-magnetic antiparallel coupling layer and an intermediate layer comprising Co—Hf or Co—Fe—B sandwiched between the first and second Co—Fe buffer layers; andthe reference layer structure comprises:a third Co—Fe buffer layer adjacent to the non-magnetic antiparallel coupling layer;a first intermediate reference layer comprising a Co—Hf film formed on the third buffer layer; 'a fourth Co—Fe buffer layer formed of a ferromagnetic Co—Fe—B film formed on the second ...

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Номер записи: 74
02-01-2014 дата публикации

Magnetic Element with Biasing Structure Distal the Air Bearing Surface

Номер: US20140004386A1
Автор: Dian Song, Dimitar Velikov Dimitrov, Mark William Covington
Принадлежит: SEAGATE TECHNOLOGY LLC

An apparatus can be generally directed to a magnetic stack having a magnetically free layer positioned on an air bearing surface (ABS). The magnetically free layer can be biased to a predetermined magnetization in various embodiments by a biasing structure that is coupled with the magnetically free layer and positioned distal the ABS.

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Номер записи: 75
02-01-2014 дата публикации

Thin film with tuned grain size

Номер: US20140004387A1
Автор: Eliot Lewis Cuthbert Estrine, Huaqing Yin, Mark Thomas Kief, Meng Zhu, Michael C. Kautzky, Venkateswara Rao Inturi, WEI Tian
Принадлежит: SEAGATE TECHNOLOGY LLC

An apparatus and associated method provides a magnetic writing element that may have at least a write pole tuned to a predetermined first grain size with a cryogenic substrate temperature. A magnetic shield can be formed with a predetermined second grain size that is tuned with the cryogenic substrate temperature.

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Номер записи: 76
16-01-2014 дата публикации

Method of Forming a Non-Uniform Write Gap Perpendicular Writer for Shingle Writing

Номер: US20140014617A1
Автор: Lijie Guan
Принадлежит: Headway Technologies Inc

A method of forming a PMR writer is disclosed wherein at least one of a recessed center section in the write pole trailing edge and a center recessed trailing shield is used to improve the field gradient at track edge. In all embodiments, there is a non-uniform write gap formed between the trailing edge and the trailing shield. The recessed portion of the write pole trailing edge and/or center recess of the trailing shield has a thickness from 10 to 40 nm in a down-track direction and a width in a cross-track direction of 20 to 200 nm. The distance between the center recess and a corner of the trailing edge is from 20 to 80 nm. A sequence of steps is provided to fabricate the two embodiments of the present invention.

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Номер записи: 77
23-01-2014 дата публикации

Magnetic head

Номер: US20140022668A1
Автор: Hitoshi Iwasaki, Masayuki Takagishi, Susumu Hashimoto
Принадлежит: Toshiba Corp

According to one embodiment, a magnetic head includes a magnetoresistive element between a first magnetic shield layer and a second magnetic shield layer, and a hard bias layer between the first magnetic shield layer and the second magnetic shield layer on a side surface of the magnetoresistive element in a first direction intersecting with a second direction which links the first and second magnetic shield layers. The hard bias layer includes Fe or an alloy containing Fe and Co. An aspect ratio (h/w) of the hard bias layer is not smaller than 2, where h is a height of the hard bias layer in the first direction and w is a thickness of the hard bias layer in the second direction.

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Номер записи: 78
23-01-2014 дата публикации

WRITE HEAD WITH MODIFIED SIDE SHIELDS

Номер: US20140022673A1
Автор: Benakli Mourad, Han Dehua, Rivkin Kirill Aleksandrovich, Wessel James Gary, Xue Jianhua, Yin Huaqing
Принадлежит: SEAGATE TECHNOLOGY LLC

A write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing surface, a leading surface that is opposite the trailing surface, and first and second surfaces; a trailing shield proximate the trailing surface of the magnetic write pole; first and second gaps proximate the first and second surfaces of the magnetic write pole; first and second side shields proximate the first and second gaps, each of the first and second side shields having a trailing shield surface; and first and second antiferromagnetic-coupling layers positioned between the trailing shield surfaces of the first and second side shields and the trailing shield. 1. A write head , the write head having an air bearing surface , the write head comprising:a magnetic write pole, wherein at the air bearing surface, the write pole has first and second opposing surfaces;first and second gaps proximate the first and second surfaces of the magnetic write pole; andfirst and second side shields proximate the first and second gaps, each of the first and second side shields having lower surfaces,wherein the lower surfaces of the first and second side shields are above the air bearing surface of the magnetic write pole.2. The write head according to claim 1 , wherein the lower surfaces of the first and second side shields are from about 10 nm to 70 nm above the air bearing surface of the magnetic write pole.3. The write head according to claim 1 , wherein the lower surfaces of the first and second side shields are from about 20 nm to 60 nm above the air bearing surface of the magnetic write pole.4. The write head according to claim 1 , wherein the lower surfaces of the first and second side shields are from about 35 nm to about 45 nm above the air bearing surface of the magnetic write pole.5. The write head according to claim 1 , wherein the first and second side shields are made of soft ferromagnetic ...

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Номер записи: 79
30-01-2014 дата публикации

MULTI-CHANNEL TAPE HEAD HAVING ASYMMETRIC CHANNEL ARRAYS

Номер: US20140029135A1
Автор: KOEPPE Peter VanderSalm
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

In one general embodiment, a magnetic head includes an inner module comprising an array of data writers; and first and second outer modules flanking the inner module. The outer modules are identical, each outer module comprising an array of data readers. A number of active data readers in each outer module is less than a number of active data writers in the inner module. For the first outer module, one of the active data readers is aliened with one of the data writers positioned towards a first end of the inner module array in the direction generally parallel to the path of tape travel thereacross. For the second outer module, one of the active data readers is aligned with one of the data writers positioned towards a second end of the inner module array in the direction generally parallel to the path of tape travel thereacross. 1. A magnetic head , comprising:an inner module comprising an array of data writers; andfirst and second outer modules flanking the inner module,wherein the outer modules are identical, each outer module comprising an array of data readers,wherein a number of active data readers in each outer module is less than a number of active data writers in the inner module,wherein, for the first outer module, one of the active data readers is aligned with one of the data writers positioned towards a first end of the inner module array in a direction generally parallel to the path of tape travel thereacross,wherein, for the second outer module, one of the active data readers is aligned with one of the data writers positioned towards a second end of the inner module array in the direction generally parallel to the path of tape travel thereacross.2. A magnetic head as recited in claim 1 , wherein claim 1 , for each module claim 1 , only one servo reader is positioned on each side of the array.3. A magnetic head as recited in claim 2 , wherein claim 2 , for each module claim 2 , a distance between the servo readers is such that the servo readers read servo ...

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Номер записи: 80
06-02-2014 дата публикации

Microwave assisted magnetic recording head having spin torque oscillator, and magnetic recording apparatus

Номер: US20140036387A1
Автор: Katsuro Watanabe, Keizou Katou, Masukazu Igarashi, Yo Sato
Принадлежит: HITACHI LTD

To provide a spin torque oscillator which is adapted to high data transfer rates and which can perform assisted magnetic recording of sufficient magnitude. A spin torque oscillator is provided with a stacked spin injection layer and a high frequency magnetic field generation layer. The stacked spin injection layer has a stacked structure in which a first magnetic layer, a coupling layer, and a second magnetic layer are stacked in the order mentioned from a far side as viewed from the high frequency magnetic field generation layer. Magnetization of the first magnetic layer and magnetization of the second magnetic layer are coupled antiparallel to each other. A polarity of the magnetization of the second magnetic layer is reversed temporally earlier than a magnetic field polarity reversal of a leakage magnetic field from the main magnetic pole.

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Номер записи: 81
06-02-2014 дата публикации

DEVICE SELECT SYSTEM FOR MULTI-DEVICE ELECTRONIC SYSTEM

Номер: US20140036393A1
Автор: Biskeborn Robert G., Tretter Larry L.
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

In one general embodiment, a system includes a first device on a first substrate; a second device on a second substrate; and a device select system coupled to the first and second devices. The device select system includes: a first portion having an array of first electrical contacts; a second portion having an array of second electrical contacts, there being more second electrical contacts than first electrical contacts, the second portion being coupled to the first and second devices, each of the first electrical contacts being associated with at least two of the second electrical contacts; and a select mechanism for selectively placing each of the first electrical contacts in electrical communication with one of the second electrical contacts associated therewith. 1. A system , comprising:a first device on a first substrate;a second device on a second substrate, the second substrate being positioned relative to the first substrate to allow transduction of data by the first and second devices to and/or from data tracks on a same side of a recording medium, wherein longitudinal axes of each of the data tracks are oriented in a direction extending along a length of the tape defined between ends of the medium positioned farthest apart;a device select system coupled to the first and second devices,the device select system moving with the first and second devices relative to a direction of travel of the recording medium thereacross, a first portion having an array of first electrical contacts;', 'a second portion having an array of second electrical contacts, there being more second electrical contacts than first electrical contacts, the second portion being coupled to the first and second devices, each of the first electrical contacts being associated with at least two of the second electrical contacts; and', 'a select mechanism for selectively placing each of the first electrical contacts in electrical communication with one of the second electrical contacts ...

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Номер записи: 82
13-02-2014 дата публикации

METHOD AND DATA STORAGE DEVICE FOR LASER FREE HEAT-ASSISTED MAGNETIC RECORDING

Номер: US20140043712A1
Автор: LEONG Siang Huei, LIU Bo, Low Boon Hao, Yuan Zhimin, Zhang Mingsheng, Zhou Tiejun
Принадлежит:

A data storage device with a heat assisted magnetic recording (HAMR) system, a magnetic recording medium, and method for data storage are provided. The data storage device includes a magnetic recording medium, a magnetic recording head, a power supply, a controller and a switching device. The magnetic recording head includes a main pole having a surface area facing the magnetic recording medium. The controller is coupled to the magnetic recording head for controlling writing information to and reading information from the magnetic recording medium. The switching device electrically couples the power supply between the main pole and the magnetic recording medium in response to a signal provided from the controller when writing information to the magnetic recording medium. The magnetic recording medium comprises a plurality of layers, including a heating layer, a field enhanced conduction layer, and an electrode layer. The electrode layer is electrically coupleable to the power supply and the magnetic recording head for heating a portion of the heating layer opposite the magnetic recording head during writing of data by the magnetic recording head to the magnetic recording medium, the portion of the heating layer defined by an electric field applied to the field enhanced conduction layer. 1. A data storage device comprising:a magnetic recording medium;a magnetic recording head comprising a main pole, wherein the main pole has a surface facing the magnetic recording medium;a power supply;a controller coupled to the magnetic recording head for controlling writing information to and reading information from the magnetic recording medium; anda switching device for electrically coupling the power supply between the main pole and the magnetic recording medium in response to a signal provided from the controller when the controller is controlling writing information to the magnetic recording medium,wherein the magnetic recording medium comprises a plurality of layers, and ...

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Номер записи: 83
13-02-2014 дата публикации

MAGNETO-RESISTANCE EFFECT ELEMENT, MAGNETIC HEAD, MAGNETIC HEAD ASSEMBLY, MAGNETIC RECORDING AND REPRODUCING APPARATUS, AND METHOD FOR MANUFACTURING MAGNETO-RESISTANCE EFFECT ELEMENT

Номер: US20140043713A1
Автор: Isowaki Yousuke, IWASAKI Hitoshi, TAKAGISHI Masayuki
Принадлежит:

According to one embodiment, a magneto-resistance effect element includes a first shield, a second shield, a third shield, a first magnetic layer, a second magnetic layer, and an intermediate layer. The third shield is provided between the first shield and the second shield, and is in contact with the second shield. A length of the third shield along a first direction crossing a stacking direction from the first shield toward the second shield is shorter than a length along the first direction of the second shield. The first magnetic layer is provided between the first shield and the third shield. The second magnetic layer is provided between the first magnetic layer and the third shield, and is exchange-coupled to the third shield. The intermediate layer is provided between the first magnetic layer and the second magnetic layer. 1. A magneto-resistance effect element comprising:a first shield;a second shield;a third shield provided between the first shield and the second shield, being in contact with the second shield, and having a length along a first direction crossing a stacking direction from the first shield toward the second shield shorter than a length along the first direction of the second shield,a first magnetic layer provided between the first shield and the third shield;a second magnetic layer provided between the first magnetic layer and the third shield and exchange-coupled to the third shield; andan intermediate layer provided between the first magnetic layer and the second magnetic layer.2. The element according to claim 1 , wherein the third shield is formed in one body with the second shield.3. The element according to claim 1 , wherein the third shield includes a same material as a material included in the second shield.4. The element according to claim 1 , wherein an area of a surface opposed to the second magnetic layer of the third shield is not less than 25 square nanometers and not more than 900 square nanometers.5. The element according to ...

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Номер записи: 84
20-02-2014 дата публикации

MAGNETO-RESISTANCE EFFECT ELEMENT, MAGNETIC HEAD, MAGNETIC HEAD ASSEMBLY, MAGNETIC RECORDING AND REPRODUCING APPARATUS, AND METHOD FOR MANUFACTURING MAGNETO-RESISTANCE EFFECT ELEMENT

Номер: US20140049857A1
Автор: Isowaki Yousuke, IWASAKI Hitoshi, TAKAGISHI Masayuki
Принадлежит:

According to one embodiment, a magneto-resistance effect element includes: a first shield; a second shield; a first side shield layer; a second side shield layer; a stacked body; a first shield guide layer; and a second shield guide layer. The first shield guide layer includes a fifth magnetic layer provided between the first side shield layer and the stacked body. The second shield guide layer includes a sixth magnetic layer provided between the second side shield layer and the stacked body. A distance between the first side shield layer and the first shield guide layer is shorter than a distance between the stacked body and the first shield guide layer. A distance between the second side shield layer and the second shield guide layer is shorter than a distance between the stacked body and the second shield guide layer. 1. A magneto-resistance effect element comprising:a first shield;a second shield; a first magnetic layer provided between the first shield and the second shield;', 'a first nonmagnetic intermediate layer provided between the first magnetic layer and the second shield; and', 'a second magnetic layer provided between the first nonmagnetic intermediate layer and the second shield and antiferromagnetically coupled to the first magnetic layer;, 'a first side shield layer including a third magnetic layer provided between the first shield and the second shield and away from the first side shield layer in a first direction intersecting with a stacking direction from the first shield toward the second shield;', 'a second nonmagnetic intermediate layer provided between the third magnetic layer and the second shield and away from the first side shield layer in the first direction; and', 'a fourth magnetic layer provided between the second nonmagnetic intermediate layer and the second shield and away from the first side shield layer in the first direction and antiferromagnetically coupled to the third magnetic layer;, 'a second side shield layer including a ...

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Номер записи: 85
06-03-2014 дата публикации

Magnetic Recording Head Having a Pole Tip Shield

Номер: US20140063657A1
Автор: Gao Kaizhong, Han Dehua, Linville Eric S., Meloche Eric, Xue Jianhua, Yin Huaqing
Принадлежит: SEAGATE TECHNOLOGY LLC

A write element including a pole tip shield is disclosed. In embodiments disclosed, for example, the pole tip shield includes side shield portions fabricated of a graded magnetic moment material to form graded side shield portions having a magnetic moment that decreases in the down-track direction along a length of the side shield portions. In another embodiment, the pole tip shield includes side shield portions having a shortened length extending along a partial length of side edges of the pole tip. In illustrated embodiments, the side shield portions are formed of a contoured body having an indented portion forward of the leading edge of the pole tip. The indented portion has a rounded indented surface contour forming a rounded profile for a gap region between a leading edge portion of the pole tip shield forward of the leading edge of the pole tip. 1. An assembly comprising:a magnetic pole assembly having a coil energizable to induce a magnetic flux in a pole having a pole tip including a leading edge, a trailing edge, a first side edge and a second side edge;a first side shield portion coextending along and spaced from the first side edge of the pole tip to form a gap region between the first side shield portion and the first side edge and a second side shield portion coextending along and spaced from the second side edge of the pole tip to form a gap region between the second side shield portion and the second side edge of the pole tip wherein, the first and second side shield portions are formed of a graded magnetic moment material to provide a variable magnetic moment along a length of the first and second side shield portions; anda magnetically insulating material in the gap region between the first side shield portion and the first side edge and the gap region between the second side shield portion and the second side edge.2. The assembly of wherein the magnetic moment of the graded magnetic moment material decreases in a down-track direction to provide a ...

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Номер записи: 86
06-03-2014 дата публикации

HEAD SUSPENSION HAVING CUTTING SURFACE THAT IS NOT DEBURRED IN ACTUATOR ATTACHING AREA OF BASE PLATE, METHOD OF MANUFACTURING BASE PLATE OF THE HEAD SUSPENSION, AND METHOD OF MANUFACTURING THE HEAD SUSPENSION

Номер: US20140063659A1
Автор: SUGIYAMA Shinji, YONEKURA Ryosuke
Принадлежит: NHK SPRING CO., LTD.

A method of manufacturing a base plate, after deburring and heat-treating a half-finished base plate, cuts off a scrap section at the ends of the scrap section from a half-finished actuator attaching area so that cutting surfaces left in a finished actuator attaching area are positioned onto the inner perimeter of the finished actuator attaching area and are oriented to at least partly face an actuator attaching position inside the finished actuator attaching area. 1. A head suspension comprising:a base plate that has an actuator attaching area being an opening in which a cutting surface is left and is not deburred;a load beam supported with a resilient part connected to the base plate and supporting a read/write head;an actuator attached at an actuator attaching position in the actuator attaching area; andan adhesive fixing the actuator to the actuator attaching position and covering the cutting surface.2. The head suspension of claim 1 , wherein the cutting surface is positioned onto an inner perimeter of the actuator attaching area and is oriented to face the actuator arranging position inside the actuator attaching area.3. A method of manufacturing a base plate that has an actuator attaching area being an opening to which an actuator is attached claim 1 , the base plate being used to support claim 1 , through a resilient part claim 1 , a load beam that supports a read/write head claim 1 , the method comprising:forming a half-finished base plate from a thin plate material, the half-finished base plate having a half-finished actuator attaching area and a scrap section that is formed in the half-finished actuator attaching area, the scrap section bridging the half-finished actuator attaching area so that ends of the scrap section are at least partly positioned onto a portion of the half-finished actuator attaching area corresponding to an inner perimeter of the actuator attaching area that is oriented to face an actuator attaching position defined in the actuator ...

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Номер записи: 87
20-03-2014 дата публикации

MAGNETIC RECORDING HEAD AND DISK DRIVE INCLUDING THE SAME

Номер: US20140078618A1
Автор: Matsumoto Takuya, NARITA Naoyuki, TAGUCHI Tomoko, YAMADA Kenichiro
Принадлежит: KABUSHIKI KAISHA TOSHIBA

According to one embodiment, a magnetic recording head of a disk drive includes a main pole configured to generate a magnetic field in a direction perpendicular to a recording layer of a recording medium, a write shield magnetic pole opposite to a trailing side of the main pole with a gap, a coil configured to excite a magnetic flux in a magnetic circuit, and a high-frequency oscillator provided between a tip portion of the main pole on a side of the recording medium and the write shield magnetic pole to generate a high-frequency magnetic field. The write shield magnetic pole includes an end face opposite to the high-frequency oscillator and the end face is formed so that a distance from the main pole increases with an increasing distance from the recording medium. 1. A magnetic recording head comprising:a main pole configured to generate a magnetic field in a direction perpendicular to a recording layer of a recording medium,a write shield magnetic pole opposite to a trailing side of the main pole with a gap,a coil configured to excite a magnetic flux in a magnetic circuit formed by the main pole and the write shield magnetic pole, anda high-frequency oscillator provided between a tip portion of the main pole on a side of the recording medium and the write shield magnetic pole and configured to generate a high-frequency magnetic field, whereinthe write shield magnetic pole comprises an end face opposite to the high-frequency oscillator and the end face is formed so that a distance from the main pole increases with an increasing distance from the recording medium.2. The magnetic recording head of claim 1 , wherein the end face of the write shield magnetic pole is tilted from the main pole toward the trailing side with respect to a direction perpendicular to the recording layer of the recording medium so that the distance from the main pole increases with the increasing distance from the recording medium.3. The magnetic recording head of claim 2 , wherein the end ...

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Номер записи: 88
20-03-2014 дата публикации

MICROWAVE-ASSISTED MAGNETIC RECORDING HEAD, METHOD OF MANUFACTURING THE SAME, MAGNETIC HEAD ASSEMBLY USING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS

Номер: US20140078620A1
Автор: Ding Ruhang, Fujita Norihito, KOUI Katsuhiko, Li Min, SHIROTORI Satoshi, Sugimura Shinobu, TAKEO Akihiko
Принадлежит:

According to one embodiment, a magnetic recording head manufacturing method includes forming a spin torque oscillator layer on a main magnetic pole layer, forming a mask on the spin torque oscillator layer, processing the spin torque oscillator layer by performing ion beam etching through the mask, and partially modifying the main magnetic pole layer through the mask. The partially modifying the main magnetic pole layer makes it possible to decrease the saturation flux density of the main magnetic pole layer in the modified portion, and form an unmodified main magnetic pole portion covered with the mask, and a modified portion around the main magnetic pole. 1. A magnetic recording head manufacturing method comprising:forming a spin torque oscillator layer on a main magnetic pole layer;forming a mask on the spin torque oscillator layer;processing the spin torque oscillator layer by performing ion beam etching on the spin torque oscillator layer through the mask; anddecreasing a saturation flux density by partially modifying the main magnetic pole layer through the mask to form an unmodified main magnetic pole portion covered with the mask, and a modified portion around the main magnetic pole.2. The method according to claim 1 , wherein the main magnetic pole layer in the modified portion has a saturation flux density of not more than 5 kG.3. The method according to claim 1 , wherein the modifying the main magnetic pole layer is performed using at least one ion selected from the group consisting of fluorine claim 1 , chlorine claim 1 , bromine claim 1 , oxygen claim 1 , nitrogen claim 1 , and boron.4. The method according to claim 1 , further comprising forming a cap layer made of a nonmagnetic metal material on the spin torque oscillator layer claim 1 , before the forming the mask on the spin torque oscillator layer.5. A magnetic recording head comprising:a main magnetic pole portion;a modified portion formed around the main magnetic pole portion by modifying the ...

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Номер записи: 89
27-03-2014 дата публикации

METHOD FOR MANUFACTURING ROTATING DEVICE

Номер: US20140082929A1
Автор: AONO Mitsuhiro, NISHIHARA Kenji
Принадлежит: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.

A rotating device includes a hub on which a magnetic recording disk is to be mounted, and a base that supports the hub in a freely rotatable manner. When at least either one of the base and the hub is referred to as a work-piece, a method for manufacturing the rotating device includes a forming step for forming the work-piece, a blowing step for blowing the formed work-piece with solid grains, a cleaning step for cleaning the work-piece blown by the grains using a cleaning fluid, an assembling step for assembling the rotating device using the cleaned work-piece. The grains have a property of vaporizing in the cleaning step or being soluble with the cleaning fluid therein. 1. A method for manufacturing a rotating device , the rotating device comprising a hub on which a recording disk is to be mounted , and a base that supports the hub in a freely rotatable manner , when at least one of the base and the hub is referred to as a work-piece , the method comprising:a forming step for forming a work-piece;a blowing step for blowing the formed work-piece with solid grains;a cleaning step for cleaning the work-piece blown by the grains using a cleaning fluid; andan assembling step for assembling the rotating device using the cleaned work-piece,wherein the grains have a property of vaporizing in the cleaning step or being soluble with the cleaning fluid therein.2. The rotating device manufacturing method according to claim 1 , wherein the blowing step includes a pulverizing step for pulverizing the grains into a size of equal to or smaller than 30 μm claim 1 , and the pulverized grains are blown to the work-piece.3. The rotating device manufacturing method according to claim 1 , wherein:the forming step includes a cutting step for forming a cut face on the work-piece; anda size of the grains blown to the work-piece in the blowing step is equal to or smaller than a cutting pitch formed on the cut face.4. The rotating device manufacturing method according to claim 1 , wherein ...

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Номер записи: 90
27-03-2014 дата публикации

Base plate for hard disk drive, method for manufacturing the same, and hard disk drive including the same

Номер: US20140085747A1
Автор: Hyun Chul Lee
Принадлежит: Samsung Electro Mechanics Co Ltd

There is provided a base plate including: a base body; and a component receiving part penetrating through the base body so as to receive a circuit component mounted on a substrate therein at the time of coupling the substrate and the base body, wherein the component receiving part includes a step part formed in an outer edge thereof so that a sealing member is seated on the step part to seal the component receiving part.

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Номер записи: 91
03-04-2014 дата публикации

Method of Making a PMR Writer with Graded Side Shield

Номер: US20140091055A1
Автор: Cherng-Chyi Yan, Jianing Zhou, Jiun-Ting Lee, Min Li, Min Zheng, Moris Dovek, Yan Wu, Zhigang Bai
Принадлежит: Headway Technologies Inc

A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a graded side shield that is conformal to the shape of the pole tip at an upper portion of the shield but not conformal to the pole tip at a lower portion. The shield includes a trailing shield, that is conformal to the trailing edge of the pole tip and may include a leading edge shield that magnetically connects two bottom ends of the graded side shield.

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Номер записи: 92
03-04-2014 дата публикации

METHOD AND APPARATUS FOR COUPLING A LASER DIODE TO A MAGNETIC WRITER

Номер: US20140091130A1
Автор: Habermas Andrew D., Hipwell Roger L., Ostrowski Mark, Zhao Yongjun
Принадлежит: SEAGATE TECHNOLOGY LLC

A write head includes a cavity configured to couple a laser diode to the write head. A bottom of the cavity includes a heat conductive element configured to contact the laser diode, a plurality of thermal studs disposed below the heat conductive element, and a substrate disposed below the thermal studs. The heat conductive element, thermal studs, and substrate are thermally coupled to draw heat from the laser diode. 120-. (canceled)21. A method comprising:forming, in order on a substrate, a thermal stud, a shield, an electrical insulation layer, and an electrode;forming a sacrificial fill feature on the electrode;depositing a fill layer around the sacrificial fill feature; andremoving the sacrificial fill feature to define a cavity in the fill layer.22. The method of claim 21 , further comprising forming a mechanical stopper at a location corresponding to a bottom of the cavity before forming the sacrificial fill feature claim 21 , wherein a first portion of the sacrificial fill feature encompasses the mechanical stopper.23. The method of claim 22 , further comprising planarizing the fill layer to establish a reference surface that is defined by the mechanical stopper.24. The method of claim 23 , further comprising forming a second portion of the sacrificial fill feature that covers the mechanical stopper.25. The method of claim 23 , further comprising depositing optical layers on the reference surface claim 23 , the optical layers comprising a waveguide core claim 23 , and wherein a vertical spacing between the mechanical stopper and the waveguide core is defined by a process used to deposit the optical layers.26. The method of claim 25 , further comprising:forming a solder bump on the electrode after removing the sacrificial fill feature;tacking a laser diode into the cavity, the laser diode comprising a solder pad configured to interface with the solder bump; andperforming a reflow operation that reshapes the solder bump so that the laser diode contacts the ...

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Номер записи: 93
10-04-2014 дата публикации

PERPENDICULAR MAGNETIC WRITE HEAD AND MAGNETIC RECORDING DEVICE

Номер: US20140098441A1
Автор: HASHINO Masachika, OTA Norikazu, SAITO Masahiro, Umehara Hiromichi
Принадлежит: TDK Corporation

A perpendicular magnetic write head includes: a magnetic pole having an end surface exposed on an air bearing surface, and extending in a height direction perpendicular to the air bearing surface; a first yoke having an end surface exposed on the air bearing surface, and facing a forward section of the magnetic pole with a gap layer in between; a second yoke located behind the first yoke with an insulating layer in between in the height direction, and connected to a backward section of the magnetic pole; a shield connecting the first yoke to the second yoke; and an additional magnetic layer located behind a boundary between the first yoke and the insulating layer, and in contact with the first yoke. 118-. (canceled)19. A perpendicular magnetic write head comprising:a magnetic pole having an end surface exposed on an air bearing surface, and extending in a height direction perpendicular to the air bearing surface;a first yoke having an end surface exposed on the air bearing surface, and facing a forward section of the magnetic pole with a gap layer in between;a second yoke located behind the first yoke with an insulating layer in between in the height direction, and connected to a backward section of the magnetic pole;a shield connecting the first yoke to the second yoke; andan additional magnetic layer located behind a boundary between the first yoke and the insulating layer, and in contact with the first yoke.20. The perpendicular magnetic write head according to claim 19 , wherein the additional magnetic layer is in contact with the shield.21. The perpendicular magnetic write head according to claim 19 , wherein the additional magnetic layer has a thickness equal to or less than a thickness of the first yoke.22. The perpendicular magnetic write head according to claim 19 , wherein the first yoke has a width larger than a width of the second yoke.23. The perpendicular magnetic write head according to claim 19 , whereinthe magnetic pole includes a first magnetic ...

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Номер записи: 94
01-01-2015 дата публикации

DATA WRITER WITH FLUX DENSITY INSERT

Номер: US20150002959A1
Автор: Bashir Muhammad Asif, Basu Swaraj, Gangmei Prim, Gubbins Mark
Принадлежит:

A data writer may be generally configured at least with a write pole adjacent to and separated from a side shield and a trailing shield. The side shield may be formed of a first material and configured with a trailing box region that is at least partially filled with a flux density insert formed of a second material that is different than the first material. 1. An apparatus comprising a write pole adjacent to and separated from side and trailing shields , the side shield comprising a first material and configured with a trailing box region at least partially filled with a flux density insert , the flux density insert comprising a second material , different than the first material.2. The apparatus of claim 1 , wherein the flux density insert comprises a single continuous layer of the second material.3. The apparatus of claim 1 , wherein the second material has a lower saturation flux density than the first material.4. The apparatus of claim 1 , wherein the flux density insert comprises a plurality of layers.5. The apparatus of claim 4 , wherein the plurality of layers form a vertical lamination with each layer continuously extending from a common vertical surface of the trailing box region.6. The apparatus of claim 4 , wherein the plurality of layers form a horizontal lamination with each layer continuously extending from a common horizontal surface of the trailing box region.7. The apparatus of claim 4 , wherein each layer of the plurality of layers has a different saturation flux density.8. The apparatus of claim 4 , wherein each layer of the plurality of layers has a saturation flux density lower than the first material.9. The apparatus of claim 4 , wherein each layer of the plurality of layers has a sidewall angled to match a write pole sidewall angle.10. The apparatus of claim 4 , wherein each layer of the plurality of layers has a sidewall angled to be dissimilar from a write pole sidewall angle.11. The apparatus of claim 1 , wherein the trailing box region ...

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Номер записи: 95
01-01-2015 дата публикации

SCISSOR MAGNETIC SENSOR HAVING A BACK EDGE SOFT MAGNETIC BIAS STRUCTURE

Номер: US20150002961A1
Автор: Keener Christopher D., Le Quang, Seagle David J., Smith Neil, Van Der Heijden Petrus A.
Принадлежит:

A scissor type magnetic sensor having a soft magnetic bias structure located at a back edge of the sensor stack. The sensor stack includes first and second magnetic free layers that are anti-parallel coupled across a non-magnetic layer sandwiched there-between. The soft magnetic bias structure has a length as measured perpendicular to the air bearing surface that is greater than its width as measured parallel with the air bearing surface. This shape allows the soft magnetic bias structure to have a magnetization that is maintained in a direction perpendicular to the air bearing surface and which allows the bias structure to maintain a magnetic bias field for biasing the free layers of the sensor stack. 1. A magnetic read sensor , comprising:a sensor stack including first and second magnetic free layers, the sensor stack having a first edge located at an air bearing surface and a second edge opposite the first edge; anda magnetically soft bias structure located adjacent to the second edge of the sensor stack and extending in a direction away from the air bearing surface, the magnetically soft bias structure having a shape that results in it having a magnetization that is oriented in a direction perpendicular to the air bearing surface.2. The magnetic read sensor as in claim 1 , wherein the magnetically soft bias structure has a length as measured in a direction perpendicular to the air bearing surface and has a width as measured parallel with the air bearing surface and wherein the length is greater than the width.3. The magnetic read sensor as in claim 1 , wherein:The magnetically soft bias structure comprises a material having an intrinsic exchange length;the magnetically soft bias structure has a width as measured parallel with the air bearing surface and a thickness measured perpendicular to the width and parallel with the air bearing surface; andthe width and thickness are less than 10 times the intrinsic exchange length.4. The magnetic read sensor as in claim 1 ...

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Номер записи: 96
01-01-2015 дата публикации

Reader structure

Номер: US20150002964A1
Автор: Mohammed Sharia Ullah Patwari, Victor Boris Sapozhnikov
Принадлежит: SEAGATE TECHNOLOGY LLC

An apparatus disclosed herein includes a sensor stack including a first layer and a barrier layer, wherein the barrier layer is in contact with a bottom shield.

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Номер записи: 97
05-01-2017 дата публикации

MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE

Номер: US20170004850A1
Автор: MAEDA Tomoyuki, Sugawara Katsuya, TAKAGISHI Masayuki, YAMADA Kenichiro
Принадлежит:

According to one embodiment, a magnetic recording head includes a magnetic pole and a shield. The shield has a first opposing surface opposing the magnetic pole. The first opposing surface includes a first opposing portion. The magnetic pole and the first opposing portion overlap in a first direction from the magnetic pole toward the shield. The first opposing portion includes a first protrusion. 117.-. (canceled)18. A magnetic recording head , comprising:a magnetic pole; anda shield having a first opposing surface opposing the magnetic pole,the magnetic pole having a second opposing surface opposing the shield,the first opposing surface including a first opposing portion, the magnetic pole and the first opposing portion overlapping in a first direction from the magnetic pole toward the shield,the first opposing portion including a first protrusion, a magnetic pole end portion in a track width direction; and', 'a magnetic pole central portion separated from the magnetic pole end portion in the track width direction,, 'the second opposing surface including a shield end portion, the magnetic pole end portion and the shield end portion overlapping in the first direction; and', 'a shield central portion, the magnetic pole central portion and the shield central portion overlapping in the first direction, and', 'a central portion distance between the magnetic pole central portion and the shield central portion being shorter than an end portion distance between the magnetic pole end portion and the shield end portion., 'the first opposing portion including19. The head according to claim 18 , wherein the end portion distance is not less than 1.1 times and not more than 1.5 times the central portion distance.20. The head according to claim 18 , wherein the second opposing surface includes a second protrusion.21. The head according to claim 18 , wherein the second opposing surface is a plane.22. The head according to claim 18 , whereinthe magnetic pole has a second opposing ...

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Номер записи: 98
05-01-2017 дата публикации

MULTIPLE READER STACKS DISPOSED IN CLOSE PROXIMITY

Номер: US20170004851A1
Автор: Boonstra Thomas Roy, Kief Mark T.
Принадлежит:

In accordance with one embodiment, a multi-reader can be manufactured so as to be able to read from multiple regions of a storage device contemporaneously during operation. Such a device can be configured, for example, by forming a first wall; forming a second wall; and utilizing the first wall and the second wall to form two adjacent reader stacks. 1. A method of forming two adjacent reader stacks comprising:depositing a mandrel material;forming a first wall on a first sidewall of the mandrel material;forming a second wall on a second sidewall of the mandrel material; andforming the two adjacent reader stacks using the first wall and the second wall.2. The method of claim 1 , wherein depositing the first wall further comprises:depositing the first wall from an etch resistant hardmask material.3. The method of further comprising:removing the mandrel material.4. The method of wherein the adjacent reader stacks are formed in the same layer.5. The method of wherein the two adjacent reader stacks are formed in the same layer.6. The method of wherein the adjacent reader stacks are separated by no more than 100 nanometers.7. The method of wherein forming the two adjacent reader stacks further comprises:forming the two adjacent reader stacks symmetrically spaced on respective sides of an insulating divider.8. The method of further comprising:forming a clear valley between the first reader stack and the second reader stack.9. The method of wherein the two adjacent reader stacks comprise a first reader stack and a second reader stack claim 1 , the method further comprising:forming at least one divided shield, wherein a first portion of the divided shield is in electrical contact with the first reader stack and a second portion of the divided shield is in electrical contact with the second reader stack and wherein the first portion of the divided shield and second portion of the divided shield are separated by an electrical insulator. The present application is a divisional ...

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Номер записи: 99
07-01-2016 дата публикации

MULTI-STACK READER WITH SPLIT MIDDLE SHIELD

Номер: US20160005424A1
Автор: Barthell Samuel Martin, McKinlay Shaun Eric, Singleton Eric Walter
Принадлежит:

A reader includes top and bottom reader stacks disposed between a top and bottom shield. The top and bottom reader stacks are offset relative to each other in a downtrack direction. Top side shields surround the top reader stack in a crosstrack direction, and bottom side shields surround the bottom reader stack in the crosstrack direction. A split middle shield is between the top and bottom reader stacks and the top and bottom side shields. The split middle shield includes top and bottom portions separated by an isolation layer, the top and bottom portions respectively coupled to the top and bottom reader stacks. 1. A reader comprising:top and bottom reader stacks disposed between a top and bottom shield, the top and bottom reader stacks offset relative to each other in a downtrack direction;top side shields surrounding the top reader stack in a crosstrack direction;bottom side shields surrounding the bottom reader stack in the crosstrack direction; anda split middle shield between the top and bottom reader stacks and the top and bottom side shields, the split middle shield comprising top and bottom portions separated by an isolation layer, the top and bottom portions respectively coupled to the top and bottom reader stacks, the bottom portion of the split middle shield comprising a synthetic antiferromagnetic multi-layer structure.2. (canceled)3. The reader of claim 1 , wherein the bottom portion of the split middle shield further comprises an antiferromagnetic layer.4. The reader of claim 3 , wherein the top portion of the split middle shield comprises a second synthetic antiferromagnetic multi-layer structure.5. The reader of claim 1 , wherein the top portion of the split middle shield comprises a soft magnetic layer claim 1 , the reader further comprising antiferromagnetic tabs surrounding the bottom side shields in the crosstrack direction.6. (canceled)7. The reader of claim 1 , wherein the top and bottom portions of the split middle shield are electrically ...

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Номер записи: 100