Nanometer Scale Instrument for Biochemically, Chemically, or Catalytically Interacting with a Sample Material

A data storage system that includes a positioning system for positioning the write/read mechanism and the storage medium of the data storage device with respect to each other in first and second predefined directions. In several embodiments, the read/write mechanism is used to mechanically write data to and electrically read data from the storage medium. In still another embodiment, the read/write mechanism is used to optically write data to and electrically read data from the storage medium. In yet another embodiment, the read/write mechanism is acoustically aided in electrically writing data to and reading data from the storage medium.

Near-Field Transducers for Focusing Light

An apparatus includes a waveguide shaped to direct light to a focal point, and a near-field transducer positioned adjacent to the focal point, wherein the near-field transducer includes a dielectric component and a metallic component positioned adjacent to at least a portion of the dielectric component. An apparatus includes a waveguide shaped to direct light to a focal point, and a near-field transducer positioned adjacent to the focal point, wherein the near-field transducer includes a first metallic component, a first dielectric layer positioned adjacent to at least a portion of the first metallic component, and a second metallic component positioned adjacent to at least a portion of the first dielectric component.

RECORDING HEAD WITH WAVEGUIDE

An apparatus having a first pole with a first side and a second side opposite from the first side, a second pole positioned on the first side of the first pole, and a waveguide positioned on the second side of the first pole wherein the waveguide has an end adjacent to an air bearing surface. The first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion. 1. An apparatus , comprising:a waveguide positioned on a first side of a first pole, the waveguide having an end adjacent to an air bearing surface,wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion, and wherein the end of the second portion of the first pole is spaced from the air bearing surface.2. The apparatus of claim 1 , wherein the first pole is a write pole.3. The apparatus of claim 1 , further comprising a second pole positioned on the second side of the first pole claim 1 , the second side being opposite from the first side of the first pole.4. The apparatus of claim 3 , wherein the first pole is magnetically coupled to the second pole.5. The apparatus of claim 3 , wherein the second pole includes a first portion spaced from the first pole and a second portion extending from the first portion to the air bearing surface claim 3 , with the second portion being structured such that the second portion is closer to the first pole than the first portion.6. The apparatus of claim 3 , wherein the second pole is at least partially wrapped around the first pole.7. The apparatus of claim 3 , further including means for energizing the first pole and the second pole.8. The ...

WRITER WITH INCREASED WRITE FIELD

A writer includes a magnetic write pole having a leading surface and a trailing surface and a near field transducer peg spaced from the leading surface of the write pole to provide energy assisted recording. A magnetic recording system for writing to and reading from a continuous magnetic medium includes a write element having a write element tip having a leading edge and a trailing edge, and wherein at least one surface of the write element that extends in a cross-track direction on the continuous magnetic medium has no line of symmetry. 1. A writer , comprising:a magnetic write pole having a leading surface and a trailing surface;a near field transducer peg spaced from the leading surface of the write pole to provide energy assisted recording.2. The writer of claim 1 , wherein the near field transducer peg is arranged substantially symetrically with respect to the leading surface of the magnetic write pole.3. The writer of claim 1 , wherein the near filed transducer peg is arranged substantially asymmetrically with respect to the leading surface of the magnetic write pole.4. The writer of claim 1 , wherein the near field transducer peg comprises an optical peg.5. The writer of claim 1 , wherein the the magnetic write pole is arranged in a first material and the near filed transducer peg is arranged in a second material.6. The writer of claim 5 , wherein the first material comprises optical cladding material comprising lower index oxides.7. The writer of claim 5 , wherein the second material comprises optical core material comprising high index oxides.8. The writer of claim 7 , wherein the optical core material comprises one selected from the group consisting of Au claim 7 , Ag claim 7 , Cu and their alloys.9. The writer of claim 5 , wherein the magnetic write pole and the near field transducer are spaced by a spacer material comprising the first material.10. The writer of claim 1 , wherein the writer is configured to provide energy assisted writing to bit ...

RECORDING HEAD INCLUDING A NEAR FIELD TRANSDUCER

An apparatus including a near field transducer positioned adjacent to an air bearing surface, the near field transducer including an electrically conductive nitride; a first magnetic pole; and a heat sink, a diffusion barrier layer, or both positioned between the first magnetic pole and the near field transducer, wherein the heat sink, the diffusion barrier or both include rhodium (Rh) or an alloy thereof; ruthenium (Ru) or an alloy thereof titanium (Ti) or an alloy thereof tantalum (Ta) or an alloy thereof tungsten (W) or an alloy thereof borides; nitrides; transition metal oxides; or palladium (Pd) or an alloy thereof. 1. An apparatus comprising:a near field transducer positioned adjacent to an air bearing surface, the near field transducer comprising an electrically conductive nitride;a first magnetic pole; and 'rhodium (Rh) or an alloy thereof; ruthenium (Ru) or an alloy thereof; titanium (Ti) or an alloy thereof; tantalum (Ta) or an alloy thereof; tungsten (W) or an alloy thereof; borides; nitrides; transition metal oxides; or palladium (Pd) or an alloy thereof.', 'a heat sink positioned between the first magnetic pole and the near field transducer, wherein the heat sink comprises2. The apparatus according to claim 1 , wherein the near field transducer comprises TiN claim 1 , ZrN claim 1 , TaN claim 1 , HfN claim 1 , or combinations thereof.3. The apparatus according to claim 1 , wherein the entire near field transducer comprises the electrically conductive nitride.4. The apparatus according to claim 3 , wherein the near field transducer includes only an electrically conductive nitride.5. The apparatus according to claim 1 , wherein the heat sink comprises Rh claim 1 , W claim 1 , or TiN.6. The apparatus according to claim 1 , wherein the near field transducer has a peg and disc structure and only the peg comprises the electrically conductive nitride.7. The apparatus according to claim 6 , wherein the disc of the near field transducer comprises gold.8. An ...

HEAT-ASSISTED MAGNETIC RECORDING (HAMR) HEAD WITH TAPERED MAIN POLE AND HEAT SINK MATERIAL ADJACENT THE POLE

A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers. 1. A heat-assisted magnetic recording (HAMR) head for writing to a magnetic recording layer comprising:a head carrier having a recording-layer-facing surface with an along-the-track axis and a cross-track axis substantially orthogonal to the along-the-track axis;a main pole on a surface substantially orthogonal to the recording-layer-facing surface, the main pole comprising a first layer and a second layer in contact with the first layer, the first layer tapering in an along-the-track direction from the second layer, the first layer having a tapered end at the recording-layer-facing surface;a near-field transducer (NFT) layer on the head carrier oriented substantially parallel to the first layer, the NFT layer having an output tip at the recording-layer-facing surface aligned with the first layer tapered end in the along-the-track direction;heat sink material adjacent the cross-track sides of the tapered first layer, wherein the heat sink material is spaced apart from the NFT; anda diffusion layer between the heat sink material and the cross-track sides of the tapered first layer, the diffusion layer comprising a material selected from In, Co, Indium oxide, and TiN.2. The HAMR head of wherein the heat ...

Heatsink structures for heat-assisted magnetic recording heads

A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.

Laser optical power monitoring using thermal sensor of a head transducer

A light source is configured to produce light, a waveguide is optically coupled to the light source and configured to direct the light to an intended focus location, and a slider is configured to use the light as an energy source for heating a region of a magnetic recording medium. A thermal sensor is situated on the slider at a location outside of a light path that includes the intended focus location. The thermal sensor is configured for sensing a short time constant change in temperature resulting from light source heating of the thermal sensor, wherein the sensed change in thermal sensor temperature is representative of optical intensity of the light delivered to the intended focus location.

Device and Method for Recording Information on a Magnetic Data Storage Medium

Disclosed is a device for recording information on a magnetic data storage medium which comprises a magnetic field source designed to be capable of generating a magnetic field in the region where the magnetic data storage medium is arranged; a source of electromagnetic radiation at a matrix of controllable mirrors; and a matrix of controllable mirrors mounted in a housing so as to be capable of reflecting electromagnetic radiation by means of the controllable mirrors into the region where the magnetic data storage medium is arranged and/or in another direction. The present invention makes it possible to record information on a fixed magnetic data storage medium. 1. A device for recording information on a magnetic data storage medium comprising:a magnetic field source configured to generate magnetic field in an area of the magnetic storage medium;a source of electromagnetic radiation configured to generate electromagnetic radiation and direct generated electromagnetic radiation to a matrix of controlled mirrors; andthe matrix of controlled mirrors installed in a housing with an ability to reflect electromagnetic radiation by controlled mirrors to the area of the magnetic storage medium and/or to the other side.2. The device according to claim 1 , wherein the electromagnetic radiation is optical one.3. A device according to claim 1 , wherein the source of electromagnetic radiation is a laser.4. The device according to claim 1 , wherein the matrix of controlled mirrors contains rotatable micromirrors.5. The device according to claim 1 , further comprising a control unit comprising:a magnetic field source control module, an electromagnetic radiation source control module, a control module for a matrix of controlled mirrors, a memory configured to store sequences of commands and/or recorded information, and a processor configured to receive data from the memory and control the magnetic field source control module, the electromagnetic radiation source control module, and ...

Reader, and reproducing apparatus and recording / reproducing apparatus

A reader ( 12 ) is provided with: a near-field light device ( 122 ) having (i) one or a plurality of quantum dots and (ii) an output end ( 224 ) laminated on an upper layer of the one or plurality of quantum dot layers; and a light receiving device ( 124 ) which is configured to receive light caused by near-field light formed by the near-field light device upon reproduction of record information on a recording medium. According to the reader, the information recorded by heat assisted magnetic recording can be reproduced without providing a separate magnetic circuit.

TE TO TM MODE CONVERTER AND METHOD OF MANUFACTURE

An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction. The cross sectional area of the second layer is smaller proximate to the input coupler and larger proximate to the NFT. 1. A method for forming a write head , comprising:depositing a first waveguide layer;depositing a second waveguide layer adjacent to the first waveguide layer;applying a first mask to a substrate parallel surface of the second waveguide layer creating a masked portion and an exposed portion of the second waveguide layer;etching the exposed portion of the second waveguide layer;applying a second mask to the substrate parallel surface of the second waveguide layer creating masked sections and exposed sections of the first and second waveguide layers; andmilling the exposed sections of both the first and the second waveguide layers, wherein the second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction, the cross sectional area being smaller proximate to an input coupler and larger ...

Polarization rotator

A polarization rotator comprises a first waveguide configured to be coupled to an input coupler at a first end and a second waveguide, wherein the first waveguide is offset from the second waveguide and a second end of the first waveguide is coupled to a second end of the second waveguide.

HEAT-ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS

A heat-assisted magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L1crystal structure and first and second layers, arranged in this order. Each of the first and second layers has a granular structure including C, SiO, and BN at grain boundaries. Vol % of the grain boundaries in each of the first and second layers is 25 to 45 vol %. Vol % of C in the first layer is 5 to 22 vol %, and a volume ratio of SiOwith respect to BN in each of the first and second layers is 0.25 to 3.5. Vol % of SiOin the second layer is greater than that of the first layer by 5 vol % or more. Vol % of BN in the second layer is smaller than that in the first layer by 2 vol % or more. 1. A heat-assisted magnetic recording medium comprising:{'sub': '0', 'a substrate, an underlayer, and a magnetic layer including an alloy having a L1crystal structure, which are arranged in this order,'}wherein the magnetic layer includes a first magnetic layer, and a second magnetic layer which is arranged farther away from the substrate than the first magnetic layer,{'sub': '2', 'wherein each of the first magnetic layer and the second magnetic layer has a granular structure including C, SiO, and BN at grain boundaries,'}wherein a volume fraction of the grain boundaries in each of the first magnetic layer and the second magnetic layer is within a range of 25 vol % to 45 vol %,wherein a volume fraction of C in the first magnetic layer is within a range of 5 vol % to 22 vol %,{'sub': '2', 'wherein a volume ratio of SiOwith respect to BN in each of the first magnetic layer and the second magnetic layer is within a range of 0.25 to 3.5,'}{'sub': 2', '2, 'wherein a volume fraction of SiOin the second magnetic layer is greater than a volume fraction of SiOin the first magnetic layer by 5 vol % or more, and'}wherein a volume fraction of BN in the second magnetic layer is smaller than a volume fraction of BN in the first magnetic layer by 2 vol % or more.2. ...

Magnetic disk device and method of controlling magnetic head

According to one embodiment, A first magnetic head is used to record or reproduce data on or from the first disk surface and includes a first two-terminal element including a first positive terminal and a first negative terminal. A second magnetic head is used to record or reproduce data on or from the second disk surface and includes a second two-terminal element including a second positive terminal and a second negative terminal. Ae current control unit includes a first current terminal which is commonly connected to the first positive terminal and the second negative terminal and a second current terminal that is commonly connected to the first negative terminal and the second positive terminal and can switch a current polarity between the first current terminal and the second current terminal.

SENSOR HEAD

Provided is a sensor head that can increase the flexibility of installation. The sensor head is a sensor head of a sensor for measuring displacement of a measurement object. The sensor head includes: a diffractive lens generating chromatic aberration along an optical axis direction on an incident light, a case part housing at least the diffractive lens inside, and fixing parts and used for fixing to a fixing object. The case part includes a cylindrical part having a cylindrical outer shape, and the outer shapes of the fixing parts and are within the outer shape of the cylindrical part when viewed in a central axis direction of the cylindrical part. 1. A sensor head of a sensor for measuring displacement of a measurement object , the sensor head comprising:a diffractive lens generating chromatic aberration along an optical axis direction on an incident light;a case part housing at least the diffractive lens inside; anda fixing part used for fixing to a fixing object,wherein the case part comprises a cylindrical part that has a cylindrical outer shape, andan outer shape of the fixing part is within the outer shape of the cylindrical part when viewed in a central axis direction of the cylindrical part.2. The sensor head according to claim 1 , wherein the fixing part extends to overlap an axis orthogonal to the central axis when viewed in the central axis direction of the cylindrical part.3. The sensor head according to claim 1 , wherein the fixing part is provided at a position different from the diffractive lens in the central axis direction of the cylindrical part.4. The sensor head according to claim 3 , wherein the fixing part is provided in an end part of the cylindrical part in the central axis direction of the cylindrical part.5. The sensor head according to claim 4 , wherein the cylindrical part has an insertion hole in the end part for inserting an optical fiber optically connected to the diffractive lens claim 4 , andthe fixing part is provided at a position ...

Heat-assisted magnetic recording device incorporating laser diode temperature control using common-mode voltage

An apparatus comprises a slider configured to facilitate heat assisted magnetic recording. The slider comprises a plurality of bond pads including a first electrical bond pad, a second electrical bond pad, and a ground pad. A laser diode comprises an anode coupled to the first electrical bond pad and a cathode coupled to the second electrical bond pad. The laser diode is operable in a non-lasing state and a lasing state. A heater is coupled between the ground pad and at least one of the anode and cathode of the laser diode. The heater is configured to generate heat for heating the laser diode during the non-lasing state and the lasing state.

Electronic Circuit And Data Storage System

A method of manufacturing an electronic circuit comprises: providing an electronic circuit having a first configuration in which the circuit comprises a resistive element having a first resistance, and irradiating at least a part of the resistive element with electromagnetic radiation to change the resistance of the resistive element from the first resistance to a second resistance, the second resistance being lower than the first resistance. A method of storing data comprises: receiving a piece of data to be stored; determining a number according to the data; and irradiating at least part of a resistive element with that number of pulses of electromagnetic radiation to change a resistance of the resistive element from a first resistance to a second resistance, the second resistance being lower than the first resistance. A difference between the first resistance and the second resistance is dependent on the number. Corresponding circuits and data storage systems are disclosed. 1. A method of manufacturing an electronic circuit , the method comprising:providing an electronic circuit having a first configuration in which the circuit comprises a resistive element having a first resistance; andirradiating at least a part of said resistive element with electromagnetic radiation to change the resistance of said resistive element from said first resistance to a second resistance, wherein said second resistance is lower than said first resistance.2. A method in accordance with claim 1 , wherein the electronic circuit comprises electrically insulative material covering at least one side of the resistive element claim 1 , and said irradiating comprises irradiating said part with electromagnetic radiation through the electrically insulative material.3. A method in accordance with claim 2 , wherein the electrically insulative material is at least substantially transparent to visible light.4. A method in accordance with claim 1 , wherein the resistive element comprises ...

Magnetic-photoconductive material, magneto-optical data storage device, magneto-optical data storage system, and light-tunable microwave components comprising a photoconductive-ferromagnetic device

The present invention concerns a magnetic-photoconductive material including orientable magnetic moments or spins, the material being configured to generate photo-carriers permitting to orientate or re-orientate the magnetic moments or spins at a material temperature less than the Curie Temperature (T C ) or Curie point.

LASER MODE HOPPING DETECTION FOR HEAT-ASSISTED MAGNETIC RECORDING DEVICE

Methods and apparatuses for detecting mode hopping in a laser diode or other optical energy source in heat-assisted magnetic recording. An output power of the laser diode or other optical energy source is measured and the output power is differentiated over time to determine a rate of change. If it is determined that the rate of change exceeds a threshold value, a fault signal is asserted indicating a potential mode hopping event. 1. A method for detecting mode hopping in an optical energy source , the method comprising steps of:receiving a time-variant signal from a photodetector optically connected to the optical energy source indicating an output power of the optical energy source;differentiating the signal over time to determine a rate of change in the output power of the optical energy source;determining whether the rate of change exceeds a threshold value; andupon determining that the rate of change exceeds the threshold value, asserting a fault signal indicating a potential mode hopping event in the optical energy source.2. The method of claim 1 , wherein the optical energy source is utilized in writing data to a media in a storage device.3. The method of claim 2 , wherein the fault signal is sent to a controller of the storage device; and wherein the controller performs error recovery when the fault signal is received.4. The method of claim 1 , wherein the optical energy source comprises a laser diode claim 1 , and the photodetector comprises a bolometer.5. The method of claim 1 , wherein differentiating the signal over time is performed by a high-pass filter.6. The method of claim 1 , wherein differentiating the signal over time is performed by an AC-coupled differentiator circuit.7. The method of claim 1 , wherein determining whether the rate of change exceeds a threshold value is performed by a comparator.8. The method of claim 1 , wherein the steps are performed by a fault logic circuit in a preamplifier of a hard disk drive (“HDD”) device implementing ...

Plasmon Generator with Metallic Waveguide Blocker for TAMR and a Method of its Fabrication

A TAMR (thermal assisted magnetic recording) write head and a method of its fabrication. The write head has a metal blocker formed against a distal end of a waveguide. The waveguide focuses optical radiation on an adjacent plasmon generator where it excites plasmon modes that heat the recording medium. Although the plasmon generator typically heats the recording medium using the plasmon near field to supply the required Joule heating, an unblocked waveguide would also send optical radiation to the medium and surrounding structures producing unwanted heating and device unreliability. The role of the blocker is to block the unwanted optical radiation and, thereby, to limit the heating to that supplied by the plasmon near field. 1. A method for forming a TAMR head , comprising:providing a magnetic write head having a main write pole and a heat sink layer formed on a leading edge side of said main write pole;depositing a first layer of metal on a horizontal surface of said heat sink layer;forming a tapered surface on said first layer of metal;depositing a first layer of dielectric on said tapered surface, then;depositing a second layer of dielectric on said first layer of dielectric wherein said second layer will form the core of a waveguide;planarizing said dielectric layers to remove excess dielectric material;depositing a metal mask on said planarized surface and patterning said mask using a patterned photoresist followed by an ion-beam etch (IBE) to define a waveguide shape;forming a waveguide using said patterned metal mask to guide a reactive-ion etch (RIE);planarizing said waveguide using chemical mechanical polishing (CMP) and using a dry etch to remove remnants of metal mask and then depositing a side cladding layer.2. The method of wherein said taper is formed by a method further comprising:forming a layer of photolithographic masking material on an upper surface of said layer of metal; thenusing an ion-beam etching (IBE) process guided by said layer of ...

MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS

A magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L1type crystal structure with a (001) orientation, wherein the substrate, the underlayer, and the magnetic layer are stacked in this order, the underlayer includes a first underlayer, the first underlayer is a crystalline layer that includes a material containing W as a main component and a nitride whose content ranges from 1 mol % to 80 mol %, and the nitride includes one or more elements selected from a group consisting of Al, B, Si, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W. 1. A magnetic recording medium comprising:a substrate;an underlayer; and{'sub': '0', 'a magnetic layer including an alloy having a L1type crystal structure with a (001) orientation,'}wherein the substrate, the underlayer, and the magnetic layer are stacked in this order, the first underlayer is a crystalline layer that includes a material containing W as a main component and a nitride whose content ranges from 1 mol % to 80 mol %, and', 'the nitride includes one or more elements selected from a group consisting of Al, B, Si, Ti,, 'the underlayer includes a first underlayer,'}Zr, Hf, V, Nb, Ta, Cr, Mo, and W.2. The magnetic recording medium according to claim 1 , whereinthe content of the nitride in the first underlayer ranges from 20 mol % to 30 mol %, andthe nitride includes Ti, Zr, or Ta.3. The magnetic recording medium according to claim 1 , whereinthe underlayer further includes a second underlayer, andthe second underlayer is a crystalline layer provided between the substrate and the first underlayer and containing W as a main component thereof.4. The magnetic recording medium according to claim 1 , further comprising:an orientation control layer between the substrate and the underlayer,wherein the orientation control layer is a Cr layer having a BCC structure, an alloy layer containing Cr as a main component and having a BCC structure, or an alloy layer having a B2 structure.5. ...

METHOD OF WRITING SERVO INFORMATION ON A STORAGE MEDIUM AND ARRANGEMENT FOR WRITING SERVOR INFORMATION ON A STORAGE MEDIUM

According to embodiments of the present invention, a method of writing servo information on a storage medium is provided. The method includes applying heat to a servo portion of a storage medium, and applying a magnetic field to the servo portion that is heated to write servo information on the servo portion. According to further embodiments of the present invention, an arrangement for writing servo information on a storage medium and a method of forming a storage medium are also provided. 1. A method of writing servo information on a storage medium , the method comprising:applying heat to a servo portion of a storage medium; andapplying a magnetic field to the servo portion that is heated to write servo information on the servo portion.2. The method as claimed in claim 1 , wherein applying heat to a servo portion of a storage medium comprises irradiating the servo portion with a laser light.3. The method as claimed in claim 2 , further comprising passing the laser light through a mask claim 2 , the mask comprising:at least one transmissive portion configured to selectively pass a part of the laser light to irradiate at least one region of the servo portion; andat least one non-transmissive portion configured to selectively block another part of the laser light.4. The method as claimed in claim 2 , further comprising focusing the laser light towards the servo portion to irradiate the servo portion.5. The method as claimed in claim 2 , further comprising collimating the laser light prior to irradiating the servo portion.6. The method as claimed in claim 2 , further comprising shaping a beam profile of the laser light prior to irradiating the servo portion.7. The method as claimed in claim 1 , further comprising DC erasing the storage medium prior to applying the magnetic field to the servo portion that is heated to write the servo information on the servo portion.8. The method as claimed in claim 2 , further comprising splitting the laser light into a first light ...

TAPE RECORDING MEDIUM, INFORMATION RECORDING/REPRODUCING DEVICE, AND METHOD OF MANUFACTURING TAPE RECORDING MEDIUM

Provided is a tape recording medium including: a base layer having a first surface and a second surface; a first recording layer disposed over the first surface of the base layer and capable of optically recording first data; an imprinted layer disposed between the base layer and the first recording layer; and a second recording layer. The second recording layer is disposed over the second surface of the base layer, contains a magnetic material, and has recorded second data different from the first data. 1. A tape recording medium comprising:a base layer having a first surface and a second surface;a first recording layer disposed over the first surface of the base layer and capable of optically recording first data;an imprinted layer disposed between the base layer and the first recording layer; anda second recording layer disposed over the second surface of the base layer, containing a magnetic material, and having recorded second data different from the first data.2. The tape recording medium according to claim 1 , whereinthe second data is information relating to a position along a longitudinal direction of the tape recording medium.3. The tape recording medium according to claim 2 , whereinthe second data is information indicating a position along a track provided over the first recording layer.4. The tape recording medium according to claim 1 , whereinthe imprinted layer is provided repeatedly with a predetermined tracking pattern.5. An information recording/reproducing device for recording or reproducing first data in or from a tape recording medium claim 1 , the device comprising:an optical recording/reproducing unit configured to optically record or reproduce the first data; anda magnetic recording/reproducing unit configured to magnetically record or reproduce second data in or from the tape recording medium, the second data being different from the first data.6. A method of manufacturing a tape recording medium claim 1 , the method comprising the steps of: ...

BOLOMETER FOR INTERNAL LASER POWER MONITORING IN HEAT-ASSISTED MAGNETIC RECORDING DEVICE

An apparatus comprises a slider having an air-bearing surface (ABS), a write pole at or near the ABS, and a reader at or near the ABS and connected to a pair of reader bond pads of the slider. A near-field transducer (NFT) is formed on the slider at or near the ABS, and an optical waveguide is formed in the slider and configured to receive light from a laser source. A sensor is situated proximal of the write pole at a location within the slider that receives at least some of the light communicated along the waveguide. The sensor may be electrically coupled to the reader bond pads in parallel with the reader, and configured to generate a signal indicative of output optical power of the laser source. 1. An apparatus , comprising:a slider having an upper surface, a lower air-bearing surface (ABS), and an internal body extending between the upper and lower surfaces;a write pole at or near the ABS;a reader at or near the ABS and connected to a pair of reader bond pads of the slider, the reader bond pads configured to electrically bias the reader during read operations;a near-field transducer (NFT) at or near the ABS;an optical waveguide in the slider and extending from the upper surface of the slider through the internal body of the slider and to the NFT, the waveguide configured to receive light from a laser source; and situated proximal of the write pole at a location within the internal body of the slider that receives at least some of the light communicated along the waveguide;', 'situated proximal but spaced apart from a core of the waveguide so as to absorb enough optical power to generate a bolometric response while negligibly disturbing transmission of optical energy along the waveguide; and', 'configured to generate a signal indicative of output optical power of the laser source during write operations., 'a bolometer2. The apparatus of claim 1 , wherein the bolometer is spaced apart from the core of the waveguide by about 50 to 300 nm.3. The apparatus of claim 1 ...

HEAD GIMBAL ASSEMBLY AND MAGNETIC DISK DEVICE WITH THE SAME

According to one embodiment, a head gimbal assembly includes a suspension and a magnetic head supported by the suspension via a gimbal portion. The magnetic head includes a slider and a head portion in the slider. The slider includes an air bearing surface, a pair of side surfaces, a leading-side end surface, and a trailing-side end surface. The slider includes a deep groove which is formed between a leading-side step portion and a trailing-side step portion and is open to the air bearing surface and the pair of side surfaces, and at least a pair of capturing grooves which is formed on a bottom surface of the deep groove. The capturing grooves are provided along the pair of side surface and are placed with a gap from the pair of side surfaces. 1. A head gimbal assembly comprising:a suspension;a gimbal portion provided at the suspension; anda magnetic head supported on the gimbal portion,wherein the magnetic head comprisesa slider which comprises an air bearing surface including a pair of side edges, a pair of side surfaces along the pair of side edges of the air bearing surface, a leading-side end surface, and a trailing-side end surface, anda head portion provided in the slider and configured to write and read data, andwherein the slider comprises a leading-side step portion on a leading-side end portion of the air bearing surface, a trailing-side step portion on a trailing-side end portion of the air bearing surface and including the head portion, a deep groove which is formed between the leading-side step portion and the trailing-side step portion and is open to the air bearing surface and the pair of side surfaces, and at least a pair of capturing grooves which is formed on a bottom surface of the deep groove, and the pair of capturing grooves is provided along the pair of side surfaces and is disposed with a gap from the pair of side surfaces, each of the capturing grooves intermittently extends from the trailing-side step portion to the leading-side step ...

HEAD GIMBAL ASSEMBLY AND MAGNETIC DISK DEVICE HAVING THE SAME

According to one embodiment, a head gimbal assembly includes a suspension and a magnetic head supported by the suspension via a gimbal portion. The magnetic head includes a slider and a head portion provided in the slider. The slider includes an air bearing surface, a pair of side surfaces, a leading-side end surface, and a trailing-side end surface. The slider includes a deep groove which is formed between the leading-side step portion and the trailing-side step portion and is open to the air bearing surface and the pair of side surfaces, and a pair of partition walls which extends from the trailing-side step portion toward the leading-side step portion along the pair of side surfaces to close at least a portion of a side surface opening of the deep groove. 1. A head gimbal assembly comprising:a suspension;a gimbal portion provided in the suspension; anda magnetic head supported by the gimbal portion,wherein the magnetic head comprisesa slider which comprises an air bearing surface including a pair of side edges, a pair of side surfaces along the pair of side edges, a leading-side end surface, and a trailing-side end surface, anda head portion provided in the slider and configured to record and read data, andwherein the slider comprises a leading-side step portion provided on a leading-side end portion of the air bearing surface, a trailing-side step portion which is provided on a trailing-side end portion of the air bearing surface and in which the head portion is imbedded, a deep groove which is formed between the leading-side step portion and the trailing-side step portion and is open to the air bearing surface and the pair of side surfaces, and a pair of partition walls which extends from the trailing-side step portion toward the leading-side step portion along the pair of side surfaces to close at least a part of a side surface opening of the deep groove.2. The head gimbal assembly of claim 1 , whereineach of the partition walls is formed to be flush with the ...

Heatsink structures for heat-assisted magnetic recording heads

A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.

Waveguide core layer with reduced downtrack thickness proximate a near-field transducer

An apparatus includes a write pole proximate a media-facing surface of a recording head. A near-field transducer is adjacent to the write pole. A waveguide has a core layer extending from an energy source to the media-facing surface. The core layer includes a region of reduced downtrack thickness proximate the near-field transducer. The region of reduced downtrack thickness is defined by a notch facing away from the near-field transducer. A material of the notch has a different index of refraction than an index of refraction of the core layer.

MAGNETO-OPTIC KERR EFFECT METROLOGY SYSTEMS

A laser beam is directed through a transmissive axicon telescope or a reflective axicon telescope such as in a magneto-optic Kerr effect metrology system. With the transmissive axicon telescope, a Gaussian beam profile is directed through a first axicon lens and a second axicon lens. The first axicon lens and second axicon lens transfer the Gaussian beam profile of the laser beam to a hollowed laser ring. The laser beam with a hollowed laser ring can be directed through a Schwarzschild reflective objective. With the reflective axicon telescope, the laser beam is directed through two conical mirrors that are fully reflective. One of the conical mirrors defines a central hole that the laser beam passes through. 1. A system comprising:a laser source that generates a laser beam with a Gaussian beam profile;an transmissive axicon telescope or a reflective axicon telescope configured to transform the Gaussian beam profile of the laser beam to a hollowed laser ring;an optical component configured to receive the laser beam with the hollowed laser ring, wherein the optical component is a beam splitter or a fold mirror;a stage configured to hold a wafer;a detector configured to receive the laser beam reflected from the wafer; anda focal lens disposed between the detector and the optical component.2. The system of claim 1 , wherein the transmissive axicon telescope includes:a first axicon lens;a second axicon lens, wherein the laser beam passes through the first axicon lens and the second axicon lens; andan objective disposed between the optical component and the stage, wherein the objective is a Schwarzschild reflective objective.3. The system of claim 2 , wherein the laser beam has an incident angle from 16 degrees to 30 degrees using the Schwarzschild reflective objective.4. The system of claim 2 , wherein the Schwarzschild reflective objective is fully reflective.5. The system of claim 2 , wherein the first axicon lens and the second axicon lens are configured to include a ...

INTERFERING NEAR FIELD TRANSDUCER FOR ENERGY ASSISTED MAGNETIC RECORDING

An apparatus for energy assisted magnetic recording of a storage disk includes a plurality of dielectric waveguide cores configured to receive incident light energy from an energy source and direct the incident light energy to a target, and a near field transducer (NFT) formed at an air bearing surface of a magnetic recording device. The NFT is configured to focus the light energy received from the plurality of waveguide cores and to transmit the focused light energy onto the storage disk surface to generate a heating spot on the storage disk. The NFT includes a plurality of propagating surface plasmon polariton (PSPP) elements configured as plasmonic metal ridges. Each of the PSPP elements has a width approximately equivalent to the width of the heating spot and is disposed above a surface of a single waveguide core in a longitudinal alignment. 1. An apparatus for energy assisted magnetic recording of a storage disk , comprising:at least one dielectric waveguide core configured to receive incident light energy from an energy source and direct the incident light energy to a target; and at least one propagating surface plasmon polariton (PSPP) configured as a plasmonic metal ridge;', 'wherein the at least one PSPP element is disposed above a surface of the at least one waveguide core in a longitudinal alignment; and', 'wherein the at least one PSPP element is configured with a width approximately equivalent to the width of the heating spot., 'a near field transducer formed at or near an air bearing surface of a magnetic recording device and configured to focus the light energy received from at least one waveguide core and to transmit the focused light energy onto the storage disk surface to generate a heating spot on the storage disk, the near field transducer comprising2. The apparatus of claim 1 , further comprising:a plasmonic metal cap disposed above the at least one PSPP element and coupled to the at least one PSPP element.3. The apparatus of claim 2 , wherein ...

Superlattice Material, and Preparation Method and Application Thereof

The present invention relates to the technical field of superlattice magneto-optical material technologies, and in particular, to a superlattice material, and a preparation method and application thereof. According to description of embodiments, the superlattice material provided in the present invention has both a relatively good magnetic property of a ferrous garnet material and a good photoelectric absorption characteristic of a two-dimensional semiconductor material such as graphene. Magneto-optical Kerr effect data obtained through testing shows that: A saturated magneto-optical Kerr angle of the superlattice material in the present invention is 13 mdeg in a magnetic field of 2500 Oe, and a magneto-optical Kerr angle of the superlattice material is increased by 2.5 times compared with a nonsuperlattice ferrimagnetic thin film material into which no two-dimensional material is inserted, thereby achieving magneto-optical effect enhancement. 1. A superlattice material , comprising a substrate and a superlattice structure disposed on the substrate , wherein{'sub': 'n', 'the superlattice structure is [first ferrimagnetic thin film/two-dimensional material layer/second ferrimagnetic thin film], and n≥1;'}the first ferrimagnetic thin film, the two-dimensional material layer, and the second ferrimagnetic thin film are laminated successively;a material of the two-dimensional material layer is one or more of graphene, a topological insulator, a transition metal chalcogenide, and black phosphorus; andthe first ferrimagnetic thin film and the two-dimensional material layer form a heterojunction structure, and the two-dimensional material layer and the second ferrimagnetic thin film form a heterojunction structure.2. The superlattice material according to claim 1 , wherein the topological insulator is one or more of BiTe claim 1 , BiSe claim 1 , and BiTe.3. The superlattice material according to claim 1 , wherein materials of the first ferrimagnetic thin film and the second ...

SYSTEMS AND METHODS FOR INCREASING DATA RATE AND STORAGE DENSITY IN MULTILAYER OPTICAL DISCS

Systems and methods, e.g., optical apparatuses, for digital optical information storage systems that improve the speed, signal to noise, controllability, and data storage density for fluorescent and reflective multilayer optical data storage media. The systems and methods include an optical system for a reading beam of a data channel from a moving single or multi-layer or otherwise 3-dimensional optical information storage medium that comprises at least one optical element characterized by restricting the field of view (FOV) of the reading beam on an associated image plane to 0.3 to 2 Airy disk diameters in a first direction. 1. An optical system for a reading beam of a data channel from a moving single or multi-layer , 3-dimensional optical information storage medium , comprising:at least one optical element characterized by restricting the field of view (FOV) of the reading beam on an associated image plane to 0.3 to 2 Airy disk diameters in a first direction.2. The optical system of claim 1 , wherein the at least one optical element restricts the FOV of the reading beam by limiting FOV on a reading optical detector to 0.3 to 2 Airy disk diameters in the first direction.3. The optical system of claim 1 , wherein the at least one optical element restricts the FOV of the reading beam by limiting a data spot size focused on a core of an optical fiber to 0.3 to 2 Airy disk diameters in the first direction claim 1 , the optical fiber coupling the reading beam to an associated reading optical detector.4. The optical system of claim 1 , wherein the at least one optical element restricts the FOV of the reading beam to 0.3 to 1 Airy disk diameters in the first direction.5. The optical system of claim 3 , wherein the at least one optical element limits at least one of:the FOV on the reading optical detector to 0.3 to 2 Airy disk diameters in the first direction; anda data spot size focused on the end of the optical fiber to 0.3 to 2 Airy disk diameters in the first ...

Artificial finger print liquid, testing method for optical information medium using it and optical information medium

저장 매체, 기판 제조 방법, 데이터 검색 방법, 엠보싱 방법 및 데이터 저장 매체 형성 방법

바람직한 실시예에서, 데이터 저장 매체는 기판의 한쪽면이나 양쪽면에 배치되는 원하는 표면 형태들과, 또한 기판의 한쪽면이나 양쪽면에 배치되는 자기-광학 물질과 같은 데이터 저장층과 임의의 보호, 절연 및/혹은 반사층들로 그 자리(in situ) 형성될 수 있는, 동질이거나 이질의 플라스틱 기판을 포함한다. 기판은, 표면의 무결성과 매끄러움에 역효과 없이 강성을 증가하기 위해 사용되는 다양한 형태와 기하학의 보강제로, 동질의, 테이퍼 형상, 오목 형상 혹은 볼록 형상의 기하 구조를 실질적으로 가질 수 있다.

Magneto-optical switching device and method for switching a magnetizable medium

본 발명은, 자화가능한 매질을 포함하는, 매질 내의 자화를 스위칭하는 자기-광학 스위칭 장치에 관한 것이다. 본 발명에 따르면, 상기 매질의 자화를 선택적으로 배향시키기 위해, 상기 자화가능한 매질의 자기 스핀 시스템으로 각 운동량으로 전달하는데 적합한 방사 시스템이 제공된다. 더욱이, 본 발명은, 자화가능한 매질을 제공하는 단계; 선택적으로 선택된 각 운동량의 방사 빔을 제공하는 단계; 및 상기 각 운동량을 상기 자화가능한 매질의 자기 스핀 시스템으로 이송시키기 위해 상기 매질로 상기 방사 빔을 향하게하는 단계를 포함하는, 자화가능한 매질을 스위칭하는 방법에 관한 것이다. 따라서, 자기 재료들 내의 스핀 상태들은 적절한 각 운동량의 방사를 이용하여 조절될 수 있다. 도메인들의 자화를 배향하기 위한 효율적인 자계가 생성되고, 상기 재료를 국부적으로 가열시키기 위해 동시에 이용될 수 있다. The present invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the present invention, there is provided a spinning system suitable for angular momentum transfer to the magnetic spin system of the magnetizable medium to selectively orient the magnetization of the medium. Moreover, the present invention provides a method for producing a magnetizable medium, the method comprising: providing a magnetizable medium; Optionally providing a radiation beam of angular momentum selected; And directing the radiation beam to the medium to transfer the angular momentum to the magnetic spin system of the magnetizable medium. Thus, the spin states in the magnetic materials can be adjusted using radiation of the appropriate angular momentum. An efficient magnetic field for orienting the magnetization of the domains is created and can be used simultaneously to locally heat the material.

Magnetostrictive/electrostrictive thin film memory

A data storage system is described which includes a magnetostrictive, anisotropic, ferromagnetic film whose domains exhibit a preferred orientation and are initially poled in one direction along the preferred orientation. A field is applied in opposition to the one direction, the field being insufficient to cause a switching of the poled domains. An electrostrictive film is placed in contact with the ferromagnetic film and a writing system is provided to actuate the electrostrictive film to impart stresses to the ferromagnetic film at selected locations. The induced stresses reduce the anisotropy energy of the ferromagnetic film at the selected locations and enable the domains thereat to become poled in accordance with the applied field. In one version of the invention, the writing means comprises a directed energy beam such as a laser or electron beam. In another version, the writing system employs surface acoustic waves in combination with a scanned energy beam.

Magneto-optical switching device and method for switching a magnetizable medium

The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizable medium, so as to selectively orient the magnetization of said medium. In addition, the invention relates to a method of switching a magnetizable medium, comprising providing a magnetizable medium; providing a radiation beam of a selectively chosen angular momentum; and targeting said radiation beam to said medium so as to transfer said angular momentum to a magnetic spin system of said magnetizable medium. Accordingly, spin states in magnetic materials can be manipulated using radiation of a suitable angular momentum. An effective magnetic field is generated for orienting the magnetization of the domains and can simultaneously be used to locally heat the material.

Hybrid recording device (HRD) with magneto-resistance head on optically assisted media

A storage system comprising a magneto resistance sensor for reading and writing information to a storage disk is provided. The storage disk is comprised of multi-layer media or optically assisted media. The storage disk includes an overcoat and lubricant disposed on a top surface of the media.

Magneto-optical recording medium

A magneto-optical recording medium comprises a transparent substrate, a magneto-optical recording layer formed on the transparent substrate and containing a rare earth metal-transition metal alloy, and a thin film containing at least either one of platinum and palladium and formed at least on one surface of the magneto-optical recording layer. Or, the magneto-optical recording medium comprises the transparent substrate, and a magneto-optical recording layer formed on the transparent substrate by alternately overlaying a plurality of thin layers containing a rare earth metal-transition metal alloy, and a plurality of thin layers containing at least either one of platinum and palladium.

Platinum/cobalt multilayer film for magneto-optical recording

An improved sputtering process for making a platinum/cobalt (Pt/Co) multilayer film comprised of alternating layers of platinum and cobalt, said improvement comprising using as the sputter gas krypton, xenon or a mixture thereof.

Optical recording medium having two separate recording layers

In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a surface of a first substrate. A first information layer formed by a thin film for reflecting a portion of a light beam made incident on the first substrate and permitting penetration of a portion of the light beam is formed on a surface of the first substrate. Guide grooves for tracking or information pits corresponding to information signals are formed on a surface of a second substrate. A second information layer having a reflectance higher than that of the first information layer is formed on a surface of the second substrate. Between the first information layer and the second information layer, there is formed a transparent separation layer for positioning the first information layer and the second information layer to be spaced a predetermined distance apart from each other.

Thin film magnetic data transfer transducer

A disk storage device has a simultaneous data transfer head means ( 2284 ) having a plurality of data transducer means ( 2570 ) for the simultaneous storage and/or retrieval of a plurality of data on a disk means. The device makes it feasible for the simultaneous transfer of data to and from a disk storage device with a storage area formed thereon ( 2272 ), thereby increasing the I/O between the processing unit and the storage device. The magnetic data transfer transducer is fabricated on a substrate by thin film techniques with each element, including the head gap, being successively formed on more elements previously formed.

Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism

An optical information storage device including a first photodetector for detecting a regenerative signal from reflected light from an optical recording medium, a second photodetector for detecting a tracking error signal and a focusing error signal from the reflected light, and a beam splitter for separating the reflected light into a first beam directed toward the first photodetector and a second beam directed toward the second photodetector. The optical information storage device further includes a phase compensating mechanism provided between the beam splitter and the first photodetector for compensating for a phase difference of the first beam, a Wollaston prism provided between the phase compensating mechanism and the first photodetector for separating the first beam into two beams having orthogonal polarization planes, and a polarization plane rotating mechanism for rotating the polarization plane of the first beam incident on the Wollaston prism.

Method and system for simultaneous storage and/or retrieval (storval) of a plurality of data on a disk means

A disk storage device has a simultaneous data transfer head means (2284) having a plurality of data transducer means (2570) for the simultaneous storage and/or retrieval of a plurality of data on a disk means. The device makes it feasible for the simultaneous transfer of data to and from a disk storage device with a storage area formed thereon (2272), thereby increasing the I/O between the processing unit and the storage device.

Optical information recording medium and reproducing apparatus with layer identification

In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a surface of a first substrate. A first information layer formed by a thin film for reflecting a portion of a light beam made incident on the first substrate and permitting penetration of a portion of the light beam is formed on a surface of the first substrate. Guide grooves for tracking or information pits corresponding to information signals are formed on a surface of a second substrate. A second information layer having a reflectance higher than that of the first information layer is formed on a surface of the second substrate. Between the first information layer and the second information layer, there is formed a transparent separation layer for positioning the first information layer and the second information layer to be spaced a predetermined distance apart from each other.

Transfer curve tester for testing magnetic recording heads

A head testing apparatus is provided for testing an output of a magnetic data recording head. The apparatus includes first and second tester input terminals for coupling to the head, first and second input stages and an AC-coupled differential amplifier. The first input stage has a first buffer input, which is coupled to the first tester input terminal, a first buffer output and a plurality of parallel-connected buffer amplifiers coupled between the first buffer input and the first buffer output. The second input stage has a second buffer input, which is coupled to the second tester input terminal, a second buffer output and a plurality of parallel-connected buffer amplifiers coupled between the second buffer input and the second buffer output. The AC-coupled differential amplifier has first and second amplefier inputs coupled to the first and second buffer outputs through first and second capacitors, respectively, and has a measurement output.

Scanning probe microscopy inspection and modification system

A scanning probe microscopy (SPM) inspection and/or modification system which uses SPM technology and techniques. The system includes various types of microstructured SPM probes for inspection and/or modification of the object. The components of the SPM system include microstructured calibration structures. A probe may be defective because of wear or because of fabrication errors. Various types of reference measurements of the calibration structure are made with the probe or vice versa to calibrate it. The components of the SPM system further include one or more tip machining structures. At these structures, material of the tips of the SPM probes may be machined by abrasively lapping and chemically lapping the material of the tip with the tip machining structures.

Multilayered structures and their use as optical storage media

A multilayer structure that includes a substrate layer containing a mixture containing one or more copolymers that include polymerized residues from one or more styrenic monomers and one or more C 1 -C 32 linear, branched, or cyclic alkyl(meth)acrylate monomers and/or maleic-type monomers and one or more elastomeric materials; and a reflective film layer coated on a surface of the substrate layer. The multilayer structure can be used as an optical storage medium.

Patent JPH043032B2

System for applying magnetic field to opto-magnetic memory

In a magnetic field generating apparatus, a coil is wound around a core and a magnetic extending section is extended from the core member. The magnetic extending section is formed into a taper form and has a magnetic field applying surface. A magnetic flux generated in the core by supplying a current to the coil is led into the extending section and emerged from the magnetic field applying surface to an opto-magnetic memory. The magnetic flux penetrates the opto-magnetic memory and is returned to the core through a yoke.

光磁気記録媒体

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Recording medium, recording / reproducing method, and recording / reproducing apparatus

Magnetic sensor

본 발명은 기록된 자화의 크기가 미세한 경우에도 자기 기록을 재생하고, 입사광 자체를 광자기 디스크에 입사시키지 않고 광자기 디스크 상에 기록된 자화를 직접 판독하여 높은 S/N 비를 가지는 제 2 고조파의 신호들을 획득할 수 있는 자기 센서를 제공한다. 이 자기 센서는 수직 기록 매체 (101) 에 대해 배치된 전기 분극을 가지는 자기 센서 소자 (102), 및 이 자기 센서 소자 (102) 에 작용하는 레이저 생성 수단을 포함한다. 자기 센서는 주파수 ω를 갖는 레이저광 (104) 을 레이저 생성 수단으로부터 자기 센서 소자로 입사시킴으로써, 자기 센서 소자 (102) 에서 출사하는 주파수 2ω의 제 2 고조파 (105) 의 편광면의 회전각 Φ에 기초하여 수직 기록 매체 (101) 의 정보를 판독한다. The present invention reproduces the magnetic recording even when the magnitude of the recorded magnetization is minute, and second harmonics having a high S / N ratio by directly reading the magnetization recorded on the magneto-optical disk without inciding the incident light itself onto the magneto-optical disk. It provides a magnetic sensor capable of acquiring signals of. This magnetic sensor includes a magnetic sensor element 102 having electrical polarization arranged with respect to the vertical recording medium 101, and laser generating means acting on the magnetic sensor element 102. The magnetic sensor enters the laser beam 104 having the frequency ω from the laser generating means into the magnetic sensor element, thereby causing the magnetic sensor element 102 to rotate at the rotation angle Φ of the polarization plane of the second harmonic 105 of the frequency 2ω emitted from the magnetic sensor element 102. On the basis of this, the information of the vertical recording medium 101 is read. 자기 센서, 편광면, 제 2 고조파, 자화 Magnetic sensor, polarization plane, second harmonic, magnetization

光磁気デイスク

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Optical information recording and reproducing device

Method for producing an optical component

Bolometer for monitoring internal laser power in thermally assisted magnetic recording devices

Magneto-optical disk magnetizing device

Data recording device and data recording method

Information reproduction device and method

Disk device and disk device calibration method

Copier and copier

Information reproducing apparatus and method

비터비 복호 방법에 있어서, 재생이 정확하게 행해지지 않았을 때에 행해지는 리드 재시도 등의 처리를, 적정한 진폭 기준치 하에서 행한다. In the Viterbi decoding method, a process such as read retry performed when reproduction is not performed correctly is performed under an appropriate amplitude reference value. 예를 들면, 6치 4상태 비터비 복호 방법을 행하는 광자기 디스크 장치에 있어서, 광자기 디스크(6) 상에 설치된 어드레스부와 데이타부에 대응하는 진폭 기준치를 별개로 적응화하기 위해, RAA(101) 중에 12개의 레지스터(181 내지 192)를 설치한다. 통상은, 직전에 행해진 재생 동작이 종료한 시점에서의, 181 내지 192의 기억치를 그 후의 재생 동작에 따른 적응화의 초기치로 하지만, 재생이 정확하게 행해지지 않아, 리드 재시도 등의 처리가 이루어질 때에는, RAA(101) 중의 12개의 레지스터(61 내지 72)에 미리 설정된 소정치를 초기치로서 설정한다. 또한, 이러한 경우에는, 진폭 기준치의 적응화를 행하지 않도록 제어한다. For example, in the magneto-optical disk device which performs the six-valued four-state Viterbi decoding method, in order to separately adapt the amplitude reference value corresponding to the address portion and the data portion provided on the magneto-optical disk 6, RAA 101 is used. Twelve registers 181 to 192 are provided. Normally, the memory values of 181 to 192 at the end of the immediately preceding playback operation are taken as initial values of the adaptation according to the subsequent playback operation. However, when the playback is not performed correctly and a process such as read retry is performed, The predetermined values set in advance in the twelve registers 61 to 72 in the RAA 101 are set as initial values. In this case, the control is performed so as not to adapt the amplitude reference value.

디스크 재생장치

본 발명의 주요 목적은 상기의 문제들을 해결하는 디스크형 기록매체에 대한 재생장치를 제공하는 것이다. 본 발명에 따른 디스크 재생장치는 디스크형 기록매체상에 기록된 데이터를 판독하기 위해 디스크형 기록매체상에 광빔을 방사하는 광학헤드와, 광학헤드의 출력신호에 기초하여 발생된 에러신호에 기초하여 광학헤드와 스핀들모터를 서보제어하는 서보수단과, 디코더의 출력데이터를 일시적으로 저장하고, 메모리에 저장된 데이터는 디코더에서 출력된 데이터의 쓰기율보다 낮은 판독율로 판독되는 메모리와, 광학헤드와 메모리를 제어하므로 디스크형 기록매체상에 기록된 데이터가 광학헤드에 의해 읽혀지고 메모리에서 쓰여지는 동안의 제1주기와 디스크형 기록매체상에 기록된 데이터의 판독이 광학헤드에 의해 비연속적이고, 단지 메모리에 저장된 데이터의 출력만이 만들어지는 동안의 제2주기를 교대로 세팅함으로써, 디스크형 기록매체상에 기록된 데이터가 간헐적으로 판독되어 제2주기동안 서보수단의 동작을 중단하는 제어수단으로 구성되어 있는 것을 특징으로 한다.

光磁気ディスクのバイアス磁界印加装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

apparatus and method for magneto-optical writing/reading using near field

근접장을 이용한 광자기 기록/재생 장치 및 방법에 관한 것으로, 디스크의 한쪽 면 상부에 위치하고 표면에 자성막이 코팅되며 외부에 코일이 감겨 있는 파이버 팁과, 디스크의 다른 한쪽 면 상부에 위치하고 디스크에 정보 기록/재생시 상기 디스크에 광을 인가하는 광원으로 구성되는 근접장 광자기 기록/재생 장치는 파이버 팁의 코일에 전류를 인가하여 디스크의 기록영역을 자화시킴으로써 정보를 기록하고, 반대편 광원으로 디스크의 기록영역에 광을 투과시켜 기록된 정보를 재생한다. 이와 같이 정보를 기록/재생하는 본 발명은 파 필드(far field) 광기록의 문제인 회절에 의한 기록 밀도 한계를 극복하고, 근접장(near field) 광기록의 문제인 낮은 광효율과 짧은 수명을 해결하며, 재생시에 나타나는 작은 광효율과 고출력의 레이저 광에 의한 열화 현상 문제를 해결한다. The present invention relates to a magneto-optical recording / reproducing apparatus and method using a near field, comprising: a fiber tip disposed on an upper side of a disc, coated with a magnetic film on the surface thereof, and wound on a coil; A near-field magneto-optical recording / reproducing apparatus composed of a light source for applying light to the disc during / reproducing, records information by applying current to a coil of a fiber tip to magnetize the recording area of the disk, and with the opposite light source, the recording area of the disk. The recorded information is reproduced by transmitting light through it. As described above, the present invention for recording / reproducing information overcomes the recording density limit due to diffraction, which is a problem of far field optical recording, solves low optical efficiency and short lifetime, which is a problem of near field optical recording, It solves the problem of degradation caused by small light efficiency and high power laser light.

导电树脂组合物

提供一种用于包装电子器件的导电树脂组合物。由此克服碳黑很可能因磨损而从模塑产品表面脱落的缺点。它是一种导电树脂组合物，包含至少一种选自聚苯醚树脂、聚苯乙烯树脂和ABS树脂的热塑性树脂和碳黑，且它包含苯乙烯/丁二烯/丁烯/苯乙烯嵌段共聚物或者这种共聚物和烯烃树脂的混合物，其表面电阻为10 2 －10 10 。当它和IC等接触时，可显著降低碳黑因磨损而脱落导致的污染IC等。

Recording device and reproducing device for disk-shaped recording medium

Information recording method for optical recording medium

情報再生装置および再生方法

(57)【要約】 【課題】 ビタビ復号方法において、再生が正しく行わ れなかった際に行われるリードリトライ等の処理を、適 正な振幅基準値の下で行う。 【解決手段】 例えば６値４状態ビタビ復号方法を行う 光磁気ディスク装置において、光磁気ディスク６上に設 けられたアドレス部とデータ部に対応する振幅基準値を 別個に適応化するために、ＲＡＡ１０１中に１２個のレ ジスタ１８１〜１９２を設ける。通常は、直前に行われ た再生動作が終了した時点での、１８１〜１９２の記憶 値をその後の再生動作に伴う適応化の初期値とするが、 再生が正しく行われず、リードリトライ等の処理がなさ れる際には、ＲＡＡ１０１中の１２個のレジスタ６１〜 ７２に予め設定された所定値を初期値として設定する。 また、かかる場合には、振幅基準値の適応化を行わない ように制御する。

熱磁気記録装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Magento-optic head assembling method, mo head and mo disk unit

서로 평행한 제1 면과 제2 면을 가지며, 이 제1 면 상에 코일이 형성된 유리판과, 유리판의 제2 면 상에 접착된 반구 렌즈를 포함한 광자기 헤드의 조립 장치로서, 서로 직교하는 X축 방향 및 Y축 방향으로 이동 가능한 XY 스테이지와, XY 스테이지 상에 탑재된 지그와, 반구 렌즈를 파지하는 파지 기구와, 파지 기구를 서로 직교하는 X축 방향, Y축 방향 및 Z축 방향으로 이동 가능하도록 담지하는 XYZ 스테이지를 포함한다. 조립 장치는 추가로 지그 상에 얹혀진 유리판 및 반구 렌즈를 관찰하는 간섭현미경과, 간섭현미경을 Z축 방향으로 이동 가능하게 지지하는 Z 스테이지와, 간섭현미경의 관찰상을 촬상하는 촬상 장치와, 촬상 장치에 접속된 화상 처리 장치와, XY 스테이지, XYZ 스테이지, Z 스테이지 및 화상 처리 장치에 접속된 제어 장치를 포함한다. An assembling apparatus of a magneto-optical head having a first surface and a second surface parallel to each other, the glass plate having a coil formed on the first surface, and a hemispherical lens bonded to the second surface of the glass plate, the X being perpendicular to each other; An XY stage movable in the axial direction and the Y axis direction, a jig mounted on the XY stage, a gripping mechanism for holding a hemisphere lens, and a gripping mechanism moving in the X-axis direction, the Y-axis direction, and the Z-axis direction perpendicular to each other. It includes an XYZ stage to support it. The assembly apparatus further includes an interference microscope for observing the glass plate and the hemisphere lens mounted on the jig, a Z stage for movably supporting the interference microscope in the Z-axis direction, an imaging device for imaging the observation image of the interference microscope, and an imaging device And an image processing apparatus connected to the XY stage, an XYZ stage, a Z stage, and a control apparatus connected to the image processing apparatus.

ミニディスクプレーヤのクリーニングカートリッジ

(57)【要約】 （修正有） 【課題】録音再生用プレーヤにおける磁気ヘッド及びピ ックアップレンズのクリーニングをクリーニングディス クによって信号読み取りエラーがなく一遍に能率よく行 う。 【解決手段】ディスクプレーヤのピックアップレンズ及 び磁気ヘッドに対向する面にクリーニング部材を有する ディスク１をケース内に回転可能に収納したディスクク リーナであって、前記ディスクは記録再生可能なディス クであり、内周よりリードインエリア１２、ユートック エリア１３、およびレコーダブルユーザーエリア１１の 順で構成され、ピックアップレンズ清掃用のレンズクリ ーニング部材のブラシ３をレコーダブルユーザーエリア より内周側に備え、録音再生用プレーヤでは、クリニー ング中にエラー発生することなく記録（録音）操作でピ ックアツプレンズと磁気ヘッドの両方をクリーニングで き、また、再生専用プレーヤでは、再生操作でピックア ップレンズをクリーニングできる。

Optical disk drive

基于交换偏置的多状态磁存储器和逻辑器件以及磁稳定的磁存储器

用于使用铁磁和反铁磁耦合和交换偏置的磁材料和方法，所述材料和方法用于二元和多状态磁存储器件。

Optical readout method

磁気光学記憶素子

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

광학장치

본 발명의 광학장치 구조는 전체적으로 단순화되고 소형화될 수 있다. 또한, 광학장치의 제조가 단순화될 수 있고, 광학장치의 신뢰도가 향상될 수 있다. 광학장치는 그 출력을 증가시킬 수 있고, 발광광원은 저전력으로 작동할 수 있고, 광센서장치로의 반사귀환광의 양, 즉 광감지된 광의 양을 증가시킴으로써 전력소모를 감소시킬 수 있다. 광학장치는 발광부(1)와, 방사부(2)와, 수렴수단(3)과, 광센서부(4)를 포함한다. 발광부(1)로부터 방출된 광은 수렴수단(3)에 의해 방사부(2)상에 수렴 및 방사된다. 방사부(2)로부터 반사된 반사귀환광 L R 이 수렴되고, 광센서부(4)는 방사부(2)로부터의 반사귀환광에 관한 수렴수단(3)의 동일초점 근방에 배치된다. 발광부(1)로부터 방출된 광은 동일축의 경로를 통과하고, 방출된 광이 방사부(2)에 의해 반사되기 전후에 광축을 나타내는 일점쇄선 a으로 나타낸 바와 같이 광센서부(4)에 의해 광감지된다.

光磁気記録媒体の製造方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Magneto-optical head

Magneto-optical recording medium and bit forming method using the same

光磁気記録再生装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

光熱磁気記録媒体

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

기록 재생 장치(Recording and reproducing apparatus)

기록매체가 수납된 카트리지가 삽입되어 유지되는 홀더를 가지고, 이 홀더의 승강이동에 의해 기록매체가, 이 기록 및 재생을 행하는 기록재생위치에 대해 로딩 혹은 언로딩되는 기록재생장치에 있어서, 기록재생위치에서 기록매체가 올려 놓여지고, 기록 및 재생동작을 위해 기록매체를 구동하는 구동 수단과, 승강조작용 캠이 측부에 형성되고, 카트리지의 삽입방향에 대해 평행하게 슬라이드함으로써 홀더를 기록재생위치에 대해 승강시키는 승강수단을 갖추고, 승강수단은 측면에 각각 캠홈을 가미는 제1슬라이드부재 및 제2슬라이드부재를 가지고, 제1슬라이드부재 및 제2슬라이드부재는 상대적으로 미동 가능하도륵 소정의 클리어런스를 갖은 상태에서 연결되여 구성하고, 기록매체가 수납된 카트리지의 로딩 및 언로딩을 안정되게 확실하게 행할 수 있도록 한 것이다.

光学的情報記憶装置

(57)【要約】 【課題】 本発明は光学的情報記憶装置に関し、比較的 簡単、且つ、安価な構成で、安定したフォーカスエラー 信号及びトラッキングエラー信号を生成し、高品質な光 磁気信号を検出することを目的とする。 【解決手段】 光源と、光源から出射される光束を反射 して記録媒体の記録面に照射する偏光ビームスプリッタ と、記録面により反射された光束が偏光ビームスプリッ タを通過することにより発生するコマ収差を除去する第 １の手段と、偏光ビームスプリッタ及び第１の手段によ り発生される非点収差を除去する第２の手段と、非点収 差を発生される第３の手段とを備えるように構成する。

光磁気ヘツド

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

光学ヘッド

(57)【要約】 【課題】 単一の非点収差回折格子パターンを有する回 折格子により満足な非点収差特性を得ることができる光 学ヘッドを提供すること。 【解決手段】 反射媒体に記録された情報を読み取るた めの光学ヘッドに、単一の回折格子パターンを有する回 折格子と、レーザビームを射出する半導体レーザとを備 える。回折格子は、反射体と前記半導体レーザとの間に 配置され、反射ビームから＋１次又は−１次の回折ビー ムを発生させる。回折格子は、次式により定まる単一の 非点収差回折格子パターンを有する。 Φ（x,y ）＝（π／λ）（x 2 /Fx ＋y 2 /Fy ） ｘ及びｙは前記回折格子上における直角座標の座標値、 Fxは前記回折格子の非点収差の一つの焦点距離、Fyは前 記回折格子の非点収差の他の焦点距離である。

Recording disks

A recording disk for either optical or magnetic recording having improved dimensional stability as a result of reduced water absorption comprising a copolymer of a vinyl aromatic monomer and alphamethylstyrene prepared by anionic polymerization at a temperature above 61° C.

Optical devices

An optical device is made of a polymer material comprising (i) polymer portions constituted mainly of aromatic vinyl monomer units and (ii) polyphenylene ether portions; the average molecular weight of the polyphenylene ether portions being from 0.3 to 0.7, expressed in terms of the intrinsic viscosity measured in chloroform at 25°C.

Optical and magnetic recorder and reproducer

Vinylcyclohexane-based block copolymers

The present invention relates to block copolymers which are predominantly based on vinylcyclohexane and to a process for producing them. The block copolymers can be processed to form mouldings by extrusion or injection moulding. The mouldings which result therefrom are distinguished by their high resistance to thermal deformation, good mechanical properties, high transparency in the visible and near UV range, and by their particularly low birefringence and water absorption.

光学式記録再生装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Two-beam magneto-optical recording method and apparatus

光デイスクの記録再生装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

光磁気記録媒体

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

光学的記録方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

光磁気記録用ヘッド

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Information reproducing circuit

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How to record vertical tracks on information carriers and information storage media with multiple vertical tracks

본 발명은 정보 매체 상의 길이방향 트랙군들(longitudinal track bundles)을 기록하는 방법에 관한 것이다. 이 방법은 상기 트랙군들의 특수 트랙들에 트랙 정보를 기록하는 것을 포함한다. 특수 트랙들은 서로 인접한다. 새로운 트랙군을 기록할 때, 기록 및/또는 판독 헤드는 이전에 기록된 트랙군의 특수 트랙들에 포함된 트랙 정보를 사용하여 위치 결정될 수 있다. 특수 트랙들 내의 트랙 정보를 코딩하는데 사용되는 패턴들의 여러 예가 설명되어 있다. The present invention relates to a method of recording longitudinal track bundles on an information carrier. The method includes recording track information on special tracks of the track groups. Special tracks are adjacent to each other. When recording a new track group, the recording and / or reading head can be positioned using the track information contained in the special tracks of the previously recorded track group. Several examples of patterns used to code track information in special tracks are described.

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