ELECTROMAGNETIC INTERFERENCE SHEET AND MANUFACTURING METHOD THEREOF

Or of the present invention characterized, and achieving refers to the method in the embodiment are a clarified that will however, in the embodiment in the present invention refers to hereinafter a disclosure rather than defined in various different, will embodied in the form, in the embodiment the present only to is completely of the present invention disclosure are, in the present invention is in the field of the person with skill in the art of the invention executable commands for transmitting the clock radio to completely inform the be provided with which, the present invention refers to claims. and the user makes a defined by category. Same reference throughout the specification a same. referring to components.

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Electromagnetic wave turning of seat

Of the present invention certain embodiments, one heat extraction layer, and one magnetic layer includes unitized structure including, said unitized structure are arranged, stacked structure provides including electromagnetic shielding sheet.

Conventional a high turning of seat electromagnetic waves for in accordance with the results of the which require is prolonged thereby realizing high, such a high permeability suitable for forming a implementation of is comprises an magnetic. Just, the fast recharge, the, high capacity charging, and while using a deblocking filter imposes a significant request to the lateral center part of the wireless charging, the face of a removal of a heat sink for a. and more frequent presently characteristics are important. Just, for implementing a high magnetic permeability magnetic and good heat dissipation property simply the inorganic particles for implementing single mixing when diffusion layer material and shows an excellent charging efficiency and heat dissipation property it is difficult to to increase user convenience and reduce costs. Can add the magnetic powder to inorganic-coarse grains developed through this defined and, when containing inorganic particles is relatively large or obtaining higher heat dissipation property resulting in a low magnetic permeability whereby the, inorganic particles relatively reduced in effect on not efficiency surface is the fast recharge but, many charging transmit a page message to a thermal conductivity than that of the. because is provided to simply.

I.e., electromagnetic shielding sheet in accordance with the results, the heat dissipation property and the active mode, and for conserving (trade-off) river having relationship, , according to some exemplary embodiments of the present invention excellent turning of seat electromagnetic waves in accordance with the results, and radiating insulating layer is to implement one heat extraction layer, and one magnetic layer includes unitized structure including, said unitized structure are arranged, stacked structure characterized in that including.

Figure 1 shows a, according to some exemplary embodiments of the present invention also a one heat extraction layer (110), and one a magnetic layer (120) includes unitized structure including a, said unitized structure are arranged, stacked structure including electromagnetic shielding sheet (100) a. timing outlines.

Also when reference to 1, said film of laminate structure comprising top, bottom or. may include a layer of magnetic the. I.e., film of laminate structure comprising said top, or bottom in one layer magnetic layer, can be magnetic layer both two layers.

Said film of laminate structure comprising top, or bottom in one layer when the magnetic layer-mask apparatus for easily sleeping. said support member and attached to the second internal sheet, other components, for example, coil and the like and can be magnetic adjacent layers, in this case, said electromagnetic shielding sheet of the electronic device mounted in accordance with the results of the excellent can be advantageous in implementing.

Figure 1 shows a film of laminate structure comprising also said top, and bottom a layer of both. timing embodiment hereof is one including magnetic layer. Said electromagnetic shielding sheet (100) the portable terminal such as mounted within the interior of the to, with the top, and bottom a layer of both magnetic layer (120) and the shaft transfers the, in this case adjacent power receiving or the like excellent interact with as well as implementing accordance with the results of the comparison, can be advantageous in insulating.

Said heat dissipation layer based on high thermal conductivity and excellent turning of seat electromagnetic wave said layer is for refrigerator to, an inorganic particle and organic binder may comprise an. Said heat dissipation layer inorganic particles and an organic one embodiment, the capture device includes upper side of a body, and for refrigerator as well as layer is, an excellent balance between strength and hole turning of seat electromagnetic wave said constitution: in a..

Specifically, said heat dissipation layer said inorganic particles includes about 80 to about 99 weight %, said organic binder about 1 to about 20 weight % may include, specifically, said inorganic particles includes about 85 to about 98 weight %, said organic binder about 2 to about 15 weight % may include, more particularly, said inorganic particles includes about 90 to 95 weight %, about 5 to 10 weight % said organic binder may include.

Said of inorganic particles less than than about 80 weight %, said organic binder content of about 20 weight % converter converts a current causing sufficient has at the pulse to calculate a demand is it is difficult.

Furthermore, content of about 99 weight % of inorganic particles said oil film bearing sleeve has a cylindrical, said organic binder content of less than about 1 weight % when the electromagnetic shielding sheet of said heat said olefin layer, said lower durability of turning of seat electromagnetic waves, compared to content of inorganic particles, organic binder hold the same is said of the insufficient heat in the surface of the layer can be loss of inorganic particles.

Said inorganic particles based on high thermal conductivity from the layer is excellent for refrigerator to, specifically graphite (graphite), graphene platelets (graphene), carbon nanotube (CNT), boron nitride (BN), aluminum nitride (AlN), and combinations thereof one or more selected from the group consisting of may include a.

For example, graphite (graphite) said inorganic particles may be particles, in this case in particular applied to mineral treated as if it is provided, which has improved cost and purchasing the photograph are set. laminating cathodes on.

Furthermore, for example, said heat dissipation layer including a graphite (graphite) when inorganic as particles, graphite particles micro color has diameter of about 5 to about 45 m and the shaft transfers the, in this case in particular, heat dissipation layer in the manufacturing process of coating solution dispersible, and to formed to materials for forming the capacity ratio thereof can reach.

A organic binder said said heat dissipation layer in the manufacturing process of the proper viscosity to impart, which durability of turning of seat electromagnetic waves, inorganic particles hole well, public land, a triarylaminosilane, a tetraarylaminosilane and in, specifically styrene-butadiene rubber (SBR), styrene-ethylene-butylene-styrene copolymer (SEBS), ethylene-vinyl acetate copolymers (EVA), low density polyethylene (LDPE), acrylic resin, ester-based resin, epoxy resin and combination of them one or more selected from the group may include a.

For example, organic binder said styrene-butadiene rubber (SBR), styrene-ethylene-butylene-styrene copolymer (SEBS), or acrylic resin may comprise, in this case in particular of inorganic particles formed to dispersibility and materials for forming unit is off.

Said electromagnetic shielding sheet of electronic device mobile communication apparatus in accordance with the results of the excellent order to ensure includes said magnetic layer, said magnetic material magnetic layer may comprise an organic binder and.

Said magnetic material iron, nickel, chromium, aluminum, and combinations thereof one or more selected from the group consisting of the first to third locking States, specifically said iron can include a magnetic layer, in this case in particular the transparent glass high magnetic permeability unit is off.

Said organic binder has a magnetic material corresponding to the well in, a triarylaminosilane, a tetraarylaminosilane and hold the, specifically, styrene-butadiene rubber (SBR), styrene-ethylene-butylene-styrene copolymer (SEBS), ethylene-vinyl acetate copolymers (EVA), low density polyethylene (LDPE), acrylic resin, ester-based resin, epoxy resin and combination of them one or more selected from the group may include a.

For example, said magnetic layer is formed of an inorganic binder styrene-butadiene rubber (SBR), styrene-ethylene-butylene-styrene copolymer (SEBS), or acrylic can be comprising a diene-based resin.

Said electromagnetic shielding sheet, said magnetic layer and said heat the same layer may comprise an organic binder. Thereby, said electromagnetic shielding sheet of heat-pressed web includes a silane coupling agent easily coupled interlayer the control can be, as a result-mask apparatus for easily sleeping. the objective compound. durability of sheet.

Electromagnetic shielding sheet manufacturing method

Of the present invention another implementation, magnetic layer; said magnetic surface on one surface of the layer one heat extraction layer 12d containing IR which are laminated to form a unitized structure; said unit structure by stacking said magnetic layer 2 or more, and said heat dissipation layer electrically insulated from each other structures; and said eye-mask apparatus for easily sleeping, comprising a laminate structure composed of heat-by pressing the step to form a sealing seat; a provides manufacturing method including electromagnetic shielding sheet.

Manufacturing method by said electromagnetic shielding sheet, said electromagnetic shielding sheet (100) can be produced.

In said electromagnetic shielding sheet manufacturing method, magnetic layer therefore, the layer for cables and radiating by establishing an optical fiber at a equal.

The step said magnetic layer, said for example the placed on the magnetic layer can be and, said magnetic surface on one surface of the layer one heat spreading layer then suitable to be stacked to be in can be by.

Said magnetic unit layer 12d containing IR which are laminated one heat extraction on one surface of the layer of the structure specifically, organic solvent; inorganic particles and an organic a binder of solid; by mixing includes preparing a coating solution; and said magnetic layer on one surface said coating solution is coated with said heat spreading layer laminating; may comprise an.

Specifically, the coating solution said said about organic solvent includes 35 to about 45 weight %, said solid material is about 55 to about 65 weight % may include.

Said a coating solution said organic solvent and less than about 35 weight %, said solid material is about 65% when including beyond the weight, of coating solution of turning of seat electromagnetic waves flow decoding unit sequentially that lower the possibility of cracking of forming a desired thickness, coated surface thereof, and the active mode, and for conserving not uniformly formed, said heat dissipation layer can be olefin.

Furthermore, said a coating solution said organic solvent comprises greater than about 45 weight % and, said solid material is which contains less than about 55% when the weight, dispersibility of inorganic particles in coating solution to the worst and the inorganic particles is dropped the fast recharge sheet eye-mask apparatus for easily sleeping, high capacity charging, or wireless charging and the consumption of the excellent it is difficult to layer is for refrigerator.

Solids content said inorganic particles, including organic binder and to, specifically said inorganic particles are dispersed in said organic binder is a soft paste, which are in the form of aqueous of (paste). Said inorganic particles, and organic binder rod is provided to ensure easy handling by establishing an optical fiber at a equal.

I.e., solids content said said inorganic particles includes about 80 to about 99 weight %, said organic binder about 1 to about 20 weight % may include, specifically, said solids content said inorganic particles includes about 85 to about 98 weight %, said organic binder about 2 to about 15 weight % may include, more particularly, said solids content said inorganic particles includes about 90 to 95 weight %, about 5 to 10 weight % said organic binder may include.

Said of inorganic particles less than than about 80 weight %, said organic binder content of about 20 weight % converter converts a current causing sufficient has at the pulse to calculate a demand is it is difficult.

Furthermore, content of about 99 weight % of inorganic particles said oil film bearing sleeve has a cylindrical, said organic binder content of less than about 1 weight % when the electromagnetic shielding sheet of said heat said olefin layer, said lower durability of turning of seat electromagnetic waves, compared to content of inorganic particles, organic binder hold the same is said of the insufficient heat in the surface of the layer can be loss of inorganic particles.

Said organic fluxing agent said heat dissipation layer in the manufacturing process suitable processibility and coating that imparts, organic binder is inorganic particles that is dispersible in non-well to, a triarylaminosilane, a tetraarylaminosilane and in, an inorganic particle and organic binder and solvent selecting various receives the laser can be degraded and generally methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), ethanol, toluene, and combinations thereof one or more selected from the group consisting of may include a.

For example, said heat dissipation layer is formed of an inorganic as methyl ethyl ketone (MEK) such as ketones may comprise, in this case in particular advantageous drying a boiling point of lower unit is off.

Said organic solvent, and solid coating having a step, the same constitution: a method particularly limited, for example, paste mixer can be mixed by (Paste Mixer).

Taken along a line perpendicular to a said step coating on one surface of the layer of magnetic said, constitution: a limited particularly method thereof, for example, knife coater (Knife Coater) by coating be.

For example, establishing an optical fiber at a side, said a coating solution said about organic solvent includes 35 to about 45 weight %, said solid material is about 55 to about 65 weight % including when, said of making and coating solution, good coating can be further ensure a high processibility is desired.

In said electromagnetic shielding sheet manufacturing method, said unit structure by stacking said magnetic layer 2 or more, and said heat dissipation layer, comprising a laminate structure composed of alternately superimposed the, top film of laminate structure comprising said, magnetic layer to a bottom portion or can be configured in such a way that it.

For example, electrically a common pin 2 or more said unit structure, least one of the positions the underlying magnetic layers structure after, from plurality of unit structure magnetic layers to a bottom portion applications is made by laminating attached is supplied to.

Or, plurality of same said method then if they are in a stacked modular construction, then, finally stacked said unitized structure for heat dissipation of layer, finally magnetic layer by the method is characterized in that film of laminate structure comprising said top, and bottom magnetic layers on both can be is supplied to.

At this time, said unitized structure for example, two 2, two 3, two 4, two 5, or 6 can be deposited dog, top, and bottom to at least one of. can be stacked is supplied to magnetic layers.

Said electromagnetic shielding sheet such as portable terminal mounted within the interior of the to, with the top, or bottom layer of magnetic layer adjacent power receiving or the like when interact with excellent in accordance with the results and enables a user to, insulating in a beneficial effect..

By pressing the heat-, comprising a laminate structure composed of said eye-mask apparatus for easily sleeping the step to form a sealing seat at a temperature of about 140 to about 180 °C, pressure of about 40 to about 120 kgf/cm2 be. A cooling system cooling heat-pressed web, such that the pressures and said range by satisfied by, said heat dissipation layer, and said rigidly without sacrifice of component magnetic layer can be deposited, thereby said electromagnetic shielding sheet performed excellent in durability excellent heat dissipation property, and can be simultaneously exhibits accordance with the results of the comparison.

Thereby, the cold air flows and comparison. described hereinafter of the present invention in the embodiment. However only one embodiment of the present invention relate to exerting its embodiment the present invention the limited not.

In the embodiment and comparisonexample

In the embodiment 1

Ferrite (Ferrite) and styrene-butadiene rubber (SBR) was including a magnetic layer. Furthermore, inorganic as particles includes particles 85 weight % graphite (graphite), organic binder as styrene-butadiene rubber (SBR) been produced with at % including solid material is a weight 15. Furthermore, paste mixer (Paste Mixer) using (interactive deck, PDM-300), said solids 60 weight %, and methyl ethyl ketone (MEK): 1:1 for (Toluene) toluene 40 weight % of an organic solvent containing containing liquid coating for manufacturing processes and the cost of production. Furthermore, knife coater (Knife Coater) (timethis and mote , Comate^TM 3000VH) using said taken along a line perpendicular to said upper magnetic layer coating the-dried under, said magnetic layer on one surface one heat the front/rear sides of the unitized structure layer. A layered manner said unitized structure 6 two said magnetic layer, said heat dissipation layer electrically insulated from each other and the front/rear sides of the structure. Furthermore, at a top portion of said laminated structure magnetic layer laminated section. Furthermore, (CARVER, 4PR1BOO) Hot Press device, comprising a laminate structure composed of said fever, using an-pressed web 350 total thickness by micro m in electromagnetic shielding sheet have been prepared.

In the embodiment 2

Inorganic solids, said 95 particles as particles includes weight % graphite (graphite), organic binder as styrene-butadiene rubber (SBR) a 5 weight % including the same said in the embodiment 1 except for the host supplying the same in thickness as method been produced with at turning of seat electromagnetic waves.

In the embodiment 3

Inorganic solids, said 98 particles as particles includes weight % graphite (graphite), organic binder (SBR) styrene-butadiene rubber as a 2 weight % including the same said in the embodiment 1 except for the host supplying the same in thickness as method been produced with at turning of seat electromagnetic waves.

Compared example 1

Ferrite (Ferrite) and styrene-butadiene rubber (SBR) was including a magnetic layer. Furthermore, inorganic as particles includes particles 85 weight % graphite (graphite), organic binder as styrene-butadiene rubber (SBR) been produced with at % including solid material is a weight 15. Furthermore, paste mixer (Paste Mixer) using (interactive deck, PDM-300), said solids 60 weight %, and methyl ethyl ketone (MEK), and toluene (Toluene) of 40 weight % of an organic solvent containing 1:1 containing liquid coating for manufacturing processes and the cost of production. Furthermore, roll mill (Roll Mill) process (EXAKT, 80E) taken along a line perpendicular to said through better mixing and dispersing the once again. Furthermore, knife coater (Knife Coater) (timethis and mote , Comate^TM 3000VH) upper magnetic sheets having taken along a line perpendicular to a using coating the-dried under, said magnetic layer on one surface one heat the front/rear sides of the unitized structure layer. At a top portion of unitized structure said magnetic layer laminated it is under, , Hot Press device same (CARVER, 4PR1BOO) fever, using an-by pressing of seat electromagnetic waves of the same thickness and said in the embodiment 1 have been prepared.

Compared example 2

Ferrite (Ferrite) 92 weight % weight % and styrene-butadiene rubber (SBR) 8 mixture including a have been prepared. Furthermore, said in the embodiment 1 having high viscosity by using mixture of said electromagnetic waves of turning of seat and the same thickness of single layer been produced with at turning of seat electromagnetic waves.

Compared example 3

Ferrite (Ferrite) 94% weight, graphite particles as binder and organic % weight 3 styrene-butadiene rubber (SBR) have been prepared mixture % including a weight 3. Furthermore, said in the embodiment 1 having high viscosity by using mixture of said electromagnetic waves of turning of seat and the same thickness of single layer been produced with at turning of seat electromagnetic waves.

Compared example 4

Ferrite (Ferrite) 92 weight %, graphite particles as binder and organic % weight 5 styrene-butadiene rubber (SBR) have been prepared mixture % including a weight 3. Furthermore, said in the embodiment 1 having high viscosity by using mixture of said electromagnetic waves of turning of seat and the same thickness of single layer been produced with at turning of seat electromagnetic waves.

Compared example 5

Ferrite (Ferrite) 88 weight %, 9 weight % graphite particles and organic as binder styrene-butadiene rubber (SBR) have been prepared mixture % including a weight 3. Furthermore, said in the embodiment 1 having high viscosity by using mixture of said electromagnetic waves of turning of seat and the same thickness of single layer been produced with at turning of seat electromagnetic waves.

Evaluation

Experiment 1e.g.: measurement of prevented,

Produced in said in the embodiment and comparison e.g. respect to turning of seat electromagnetic waves, (NETZSCH, laser flash LFA447) measuring prevented, using device, said electromagnetic shielding sheet In-plane long since determined the prevented, direction. Wherein, In-plane acids to epoxygenated fatty acids therein direction, when said electromagnetic shielding sheet lying in a second plane, said plane direction of a plane parallel in the direction of..

Experiment 2e.g.: thermal conductivity for measuring

Produced in said in the embodiment and comparison e.g. thermally conductive sheet a conductive measuring device using (NETZSCH, LFA447), said electromagnetic shielding sheet In-plane it was determined that a thermal conductivity of direction.

Experiment 3e.g.: measurement of permeability

Produced in said in the embodiment and comparison e.g. respect to turning of seat electromagnetic waves, permeability measurement (LE USA WALKER, AMH) using device, it was determined that permeability in 6 MHz.

Said experiment e.g. 1 to 3 as measured in experiments described to a matrix table 1.

Said electromagnetic shielding sheet excellent in accordance with the results, and excellent heat dissipation property order to increase user convenience and reduce costs about 3.00 mm2/s prevented, at least, have an overall length of at least about 7.00 W/mK thermal conductivity, permeability simultaneously must initializes about 35%.

Said table 1 as demonstrated, in the embodiment 1 to 3 a turning of seat electromagnetic waves of about 3.00 mm2/s prevented, at least, about 7.00 W/mK or more an excellent thermal conductivity through the heat dissipation property, and at the same time about 35% or more permeability wherein the, at least two types the first conductive layer to fill the excellent can be confirm that the user.

However, compared e.g. 2 has an inorganic is is not containing any particles, compared e.g. 3 to 4 has an inorganic particles, and magnetic materials are mixed from a single layer structure as having a, embodiment the first deoxygenator unitized structure and stacking configuration is is free of. Compared e.g. 2 to 4 in the case of high permeability but appears about 35% or more, less than about 3.00 mm2/s prevented, , appears lower than 7.00 W/mK [...] about thermal conductivity, in the embodiment 1 to 3 compared to significantly poorer heat dissipation property was a main body. I.e., compared e.g. 2 to 4 a turning of seat electromagnetic waves of the fast recharge, high capacity charging, or wireless charging and the consumption of the excellent heat dissipation property cannot then have, in accordance with the results O3, and provided to increase user convenience and reduce heat dissipation property. that he or she can not.

Furthermore, compared e.g. 5 has an inorganic particles and magnetic materials are mixed from a single layer structure as having a, examples of the embodiment alternatively unitized structure and stacking configuration is is free of. Compared e.g. 3 to 4 than in the case of 5 compared e.g. is a high content of inorganic particles, about 3.00 mm2/s prevented, at least, about 7.00 W/mK shown higher than thermal conductivity. Just, or presented as a magnetic permeability whereby the [...] 30%, less than 35% in accordance with the results compared to in the embodiment 1 to 3, it was discovered by compactible. I.e., compared e.g. a charging agent of 5 efficiency and heat dissipation property to increase user convenience and reduce costs. that he or she can not.

The 1 compared e.g. 2 or more unitized structure laminated thereon not in the layered structure, but high permeability appears about 35% or more, less than 3.00 mm2/s is prevented, , appears lower than 7.00 W/mK [...] about thermal conductivity, heat dissipation property but system using quartz reaction tube 2 to 4 than compared e.g., significantly greater than in the embodiment 1 to 3 compactible was a main body. Therefore, compared e.g. excellent turning of seat electromagnetic waves of 1 in accordance with the results, and provided to increase user convenience and reduce heat dissipation property. that he or she can not.

I.e., electromagnetic waves, according to some exemplary embodiments of the present invention of seat a one heat extraction layer, and one magnetic layer includes unitized structure including, said unitized structure are arranged, stacked layered structure upper side of a body, and heat dissipation property, and in accordance with the results of the simultaneously-changed signal is shifted down.