WO2017043831A1

WO2017043831A1 - Complex sheet for absorbing/extinguishing and shielding electromagnetic waves and highly dissipating heat from electronic device and manufacturing method therefor

Info

Publication number: WO2017043831A1
Application number: PCT/KR2016/009948
Authority: WO
Inventors: 주학식
Original assignee: 주학식
Priority date: 2015-09-07
Filing date: 2016-09-06
Publication date: 2017-03-16

Abstract

Disclosed is a complex sheet for absorbing/extinguishing and shielding electromagnetic waves and highly dissipating heat from an electronic device. The complex sheet for absorbing/extinguishing and shielding electromagnetic waves and highly dissipating heat from an electronic device according to the present invention comprises: a temporarily molded graphite sheet obtained by molding a graphite substrate into a sheet, wherein the density of the sheet ranges from 0.1 to 1.5g/㎤ such that the crystal structure of the sheet is in an incomplete state; and a porous metallic sheet wherein the temporarily molded graphite sheet laminated on one side of the metallic sheet is integrally attached to the metallic sheet by press-molding so as to have a density of 1.6/㎤ to 6.0/㎤, and the metallic sheet has a plurality of pores formed therein, which are connected to the upper and lower surfaces thereof.

Description

Absorption and shielding of electromagnetic wave and high heat dissipation for electronic devices and manufacturing method

The present invention is applied to electronic devices such as mobile phones, OLED TVs, LEDs, etc. and relates to a fusion sheet and a method of manufacturing the same to enable stable electromagnetic wave absorption extinction and shielding and also to ensure excellent heat dissipation characteristics of the electronic device. Prepares a pseudo-graphite graphite sheet in a state of incomplete crystal structure by pressing a graphite substrate, and attaches and presses a multi-porous metal sheet having voids such as sintering or electroforming to one surface thereof, thereby integrally joining and molding to achieve economic and high efficiency. EMBODIMENT OF THE INVENTION The present invention relates to an electromagnetic wave absorption extinction and shielding and a heat dissipation fusion sheet for ensuring high heat radiation.

Recently, with the rapid increase of various high-tech electronic devices such as high-performance portable wireless information terminals and home appliances that are operated in conjunction with wired and wireless communication networks, the trend of high integration of electronic devices used in these devices and widening frequency of electromagnetic waves There is an increasing source of heat generation and the need for heat dissipation of equipment. In other words, as the spread of wireless information terminals such as high-performance smartphones and tablets, refrigerators, boilers, and monitoring devices connected to wired / wireless communication networks, various electronic devices or devices controlled by electronic devices are rapidly increasing. Sources of electromagnetic waves are increasing due to the high integration of electronic devices used in devices and the widening frequency of frequencies.

On the other hand, electromagnetic waves (electromagnetic waves) refers to a phenomenon in which the electromagnetic field, whose intensity changes periodically, propagates through the space, and its frequency and wavelength, as well as its electromagnetic characteristics, are diverse and used in various fields such as electric, electronic or communication devices. It is used for. The effects of electromagnetic waves on the human body are symptoms of VDT syndrome, which refers to symptoms such as headaches and visual impairments caused by heat generated by microwaves used in microwave ovens and mobile phones, and harmful electromagnetic waves emitted from computers and monitors. It can be seen through various symptoms identified by electromagnetic waves such as DisplayTerminal Syndrome. In addition, a number of studies have been reported, such as increased cancer incidence of residents near power transmission lines and brain tumors of long-term users of mobile phones.

In particular, due to the development of mobile communication technology and the popularization of personal mobile communication, the user is unprotected and exposed to high frequency electromagnetic waves generated from mobile communication devices such as mobile phones, and the temperature of the skull area increases during the use of such mobile communication devices. Research and questioning about the possibility of harmful effects on the human body continues. These electromagnetic waves may disturb other electromagnetic waves due to electromagnetic interference (EMI), as well as harmful to the human body, and may cause device failures for the electrical and electronic devices themselves. As is miniaturized and integrated, it can be said that the possibility of failure and malfunction due to self-generated electromagnetic waves as well as external electromagnetic waves exist.

In order to block the influence of the device by electromagnetic waves, a conductive metal plate (also called shield can) is attached to a case or main circuit of an electrical / electronic device to form an electromagnetic shielding means in the form of a metal plate, or EMI (ElectroMagnetic Interference) A method of shielding undesired electromagnetic waves is generally used by applying shielding paint or by vacuum plating or sputtering.

However, in the case of a portable wireless information terminal such as a mobile phone or a smart phone, since the display is disposed, shielding of the remaining parts except for the display panel may be possible, but shielded electromagnetic waves are radiated through the display panel. .

In order to solve this problem, each company has applied two types of heat dissipation sheet and EMI sheet, but in the future, there is a demand for hybrid functional sheet integrating two functions into one sheet in order to reduce production cost and efficiency. Is expected to explode. For example, due to the increase in demand for LED, one of the high heat-generating electronic devices, various semiconductors, electronic and electric parts, and automobile-related parts, the heat dissipation member is reported to be 42.3 billion yen, an increase of 38.3% compared with 2011, and the heat dissipation material is 3.4 times, which is 3.4 times It is becoming.

In addition, the mobile solution module (MSM) chip of a mobile phone has a high temperature rise when the chip's maximum temperature exceeds 80 ℃ when driven in full mode.There is a space for heat sinks to be installed in slim digital devices such as mobile phones. Since the heat spreading mechanism is used to spread the temperature of the hot spot into the entire space to lower the average temperature, it is most effective. Therefore, the thermal conductivity in the horizontal direction is high and flexible and adhesive like the conventional adhesive film. There is a need for the development of technology for producing sheets having excellent properties. As can be seen through this, it is urgent to develop an effective electromagnetic wave absorption extinction and shielding technology according to the high performance of electronic devices.

In addition, the development of effective heat dissipation technology in accordance with the high performance of the electronic device is also urgent situation, and in order to solve this problem, a graphite heat dissipation sheet coated with a thermally conductive adhesive has been proposed through the Republic of Korea Patent No. 10-0755014. Claim 5 is a graphite heat dissipation sheet coated with a thermally conductive adhesive, graphite heat dissipation sheet formed in the form of a sheet of 0.5 to 60mm thickness; The thermally conductive silicone coating is applied to one side of the graphite heat dissipating sheet, and the silicone pressure sensitive adhesive obtained by reacting 25 to 45% by weight of polydimethylsiloxane and 20 to 30% by weight of silicone resin under an alkali catalyst is formed by stirring 25 to 55% by weight of a thermally conductive pillar. An adhesive; Release paper attached to the upper side of the thermally conductive adhesive; It is applied to the other side of the graphite heat dissipation sheet, 16.6% by weight of methyl methacrylate, 16.6% by weight of methacryloxypropyltrimethoxysilane, 32.2% by weight of isopropyl alcohol, 32.2% by weight of butyl acetate and 0.4% of benzoyl peroxide A thermally conductive adhesive coated graphite heat dissipating sheet is disclosed, comprising a coating solution consisting of a mixture consisting of 10% by weight of tetrabutyl titanate and 10% by weight of chloroplatinic acid in a 2% ethylhexanol solution.

Graphite heat dissipation sheet coated with a thermally conductive adhesive according to the prior art of such a configuration is easily adhered to a display product by applying a thermally conductive adhesive prepared by mixing polydimethylsiloxane, silicone resin and thermally conductive pillars on one side of the graphite heat dissipating sheet. In addition, the thermal conductivity is improved, and the other side of the graphite heat dissipation sheet is coated with a copolymer coating solution composed of methyl methacrylate-trialkoxysilane to prevent the graphite powder from flying.

However, the graphite heat dissipation sheet coated with the thermally conductive adhesive according to the prior art is to maintain the form by forming an adhesive layer and a copolymer coating solution on the outer surface of the graphite layer made of a sheet made by hardening natural or artificial graphite powder. As the graphite layer is easily cracked or damaged due to bending deformation or external force, heat dissipation performance is poor. Therefore, as the durability of the graphite layer in the powder-hardened state is very sensitive to external impacts, considerable care must be taken in handling during manufacture, transportation and storage, as well as when attaching to electronic devices such as displays. There was a problem that mass production is difficult.

In addition, the production of relatively expensive graphite for electronic devices such as large-area display and the like is not only technically difficult, but it is difficult to economically manufacture due to poor mass production, such as having to provide a dedicated facility.

Therefore, since the graphite sheet cannot be used alone, a method of applying a protective layer on both surfaces thereof is used, but in this case, there is a problem in that the heat dissipation characteristics are reduced due to the physical properties of the protective layer, and there is still a low end durability.

The present invention has been made in order to solve the problems of the prior art as described above, and an object of the present invention is to use a porous substrate made of a porous metal sheet made of a metal having excellent thermal conductivity as a base, Press-molding the graphite substrate on one surface to press the high-pressure using a pressing device such as a press or a roller in a state in which the pseudo-structured graphite sheet in a state in which the crystal structure is incompletely laminated, resulting in a portion of the graphite substrate Strongly impregnated and bonded to the pores of the metal sheet, which can be combined in a physically and securely integrated state without using an existing adhesive resin or binder material, etc. To provide.

In addition, the present invention provides a fusion sheet for electromagnetic wave absorption and disappearance and shielding and high heat dissipation of electronic devices based on the technical theory that the micro-pore of the multi-porous metal sheet absorbs electromagnetic waves, converts and dissipates thermal energy through diffuse reflection. .

In addition, another embodiment of the present invention is a porous porous thin film having elasticity and durability by integrally attaching a composition containing graphite or an organic-inorganic resin or an aluminum-based metal to the surface of the porous porous sheet formed with pores It enables the molding in the form of a sheet, which makes it possible to apply to various electronic devices and suppresses damage such as the occurrence of cracks caused by external force, thereby increasing the product value of the applied product and producing large-area sheets such as large displays. The present invention provides a fusion sheet for electromagnetic wave absorption extinction and shielding and high heat dissipation of an electronic device, and a method of manufacturing the same.

According to a preferred embodiment of the present invention for achieving the above object, the electromagnetic wave absorption extinction and shielding and the high heat radiation fusion sheet for the electromagnetic wave, in the electromagnetic wave absorption extinction and shielding fusion sheet, the graphite substrate in the form of a sheet Caustic graphite sheet formed in an incomplete state of crystal structure to have a density of 0.1 ~ 1.5g / cm 3; The caustic graphite sheet is laminated on one surface and is integrally attached and bonded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3 by pressure molding, and includes a multi-porous metal sheet formed by forming a plurality of voids connected to the upper and lower surfaces. It is characterized by being configured to.

Herein, the electromagnetic wave absorption extinction and shielding fusion sheet has a pore size of 0.01 mm to 0.5 mm of the porous metal sheet, and the multi-porous metal sheet of the high heat dissipation sheet has a plurality of 0.001 mm to 0.05 mm voids. It is characterized by.

As a feature of the present invention, the caustic graphite sheet is formed by compression-molding graphite or graphite powder, or using a graphite composition in which one or more of organic, inorganic, and ceramic groups are formed on graphite, or organic series on graphite. It is to be formed into any one of a mixture made by mixing a heat-dissipating resin of any one or more of the non-mechanical heat, ceramic series.

As another feature of the present invention, the multi-porous metal sheet is a copper, tin, zinc, aluminum, stainless-based metal powder having a particle size of 1㎛ ~ 200㎛ by heat sintering at a temperature of 10-30% lower than the melting temperature It is a sintered sheet made by pressing this.

As another feature of the present invention, the multi-porous metal sheet is formed by immersing a molding die made of a resin that is vaporized or liquefied at a high temperature in an electrolytic bath, and then electrodepositing metal to form an electrodeposition layer, and heating the mold to remove the resin. It is a metal electrolytic cell sheet.

As another feature of the present invention, the multi-porous metal sheet is a sheet member formed by forming a pore hole by punching, laser, and etching methods in a thin plate made of copper, tin, zinc, aluminum, or stainless steel. The curved portion forming the surface and the curved surface with respect to one surface to which the pseudo-graphite graphite sheet is attached so as not to break the crystal structure in the state in which the pseudo-graphite sheet is attached by pressure molding, and proceeds inward from the curved portion. While it is configured to include an inclined surface portion is gently reduced in diameter.

As another feature of the present invention, the multi-porous metal sheet is a net sheet woven so as to cross a vertical wire and a horizontal wire made of a metal having a circular cross section.

As another feature of the present invention, the multi-porous metal sheet is integrally formed by pressing or applying or impregnating the other surface to which the graphite sheet is not attached, and a part of the multi-porous metal sheet is opposite to the other side through the pores formed on the surface of the multi-porous metal sheet. Further comprising a heat dissipation layer of a metal and an organic-inorganic resin that is impregnated and bound to the graphite sheet side of the, wherein the heat dissipation layer is formed of any one or more of PVC, PC, urethane, silicone, ABS, UV on the surface At least one of at least one of an insulating material formed by coating an insulating resin composition or an adhesive formed by applying a resin having an adhesive component or an adhesive formed by attaching a double-sided tape or a thin plate made of aluminum or aluminum alloy It is to be laminated | stacked.

According to a first embodiment of the present invention for achieving the above object, a method for manufacturing an electromagnetic wave absorbing extinction and shielding fusion sheet has a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3. Preparing a pseudo-graphite graphite sheet having an incomplete sheet form; Copper, tin-based, zinc-based, aluminum-based, stainless-based metal powders having a melting temperature of 300 ° C. to 1800 ° C., wherein the metal powder has a particle size of 1 μm to 200 μm that is higher than the melting temperature. Forming a multi-porous metal sheet which is a porous porous sintered body having a pore of 0.05 mm to 3.0 mm by heating 10 minutes to 300 minutes under a condition of ˜30% low temperature; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. It characterized in that it comprises a step of forming a fusion sheet having a size of 0.01mm ~ 0.5mm while the pressure molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

According to a second preferred embodiment of the present invention for achieving the above object, a method for manufacturing an electromagnetic wave absorbing extinction and shielding fusion sheet has a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3. Preparing a pseudo-graphite graphite sheet having an incomplete sheet form; Applying a conductive solution to the outer surface of the plate-shaped molding frame formed of a resin that is vaporized or liquefied at a high temperature to form a conductive layer, and immersed and energized it in an electroforming tank to electrodeposit metal to form an electrodeposition layer, and then heating the mold. Forming a pseudo-porous multi-porous metal sheet formed by removing resin; Forming the multi-porous metal sheet by pressing the caustic multi-porous metal sheet once to 10 times so as to have a thickness of 0.01 mm to 50 mm; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Characterized in that it comprises a; fusion sheet forming step having a size of 0.01mm ~ 0.5mm of the void while being press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

According to a third embodiment of the present invention for achieving the above object, a method for manufacturing an electromagnetic wave absorbing extinction and shielding fusion sheet has a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3. Preparing a pseudo-graphite graphite sheet having an incomplete sheet form; A sheet member in which a pore hole is formed by punching, laser, or etching in a thin plate made of copper, tin, zinc, aluminum, or stainless steel, wherein the pore hole is attached to the pseudo-graphite sheet by pressing. In order to prevent the crystal structure from being broken, a curved portion forming a curved shape with the surface is formed on the one surface to which the caustic graphite sheet is attached, and an inclined surface portion that gradually decreases in diameter while proceeding from the curved portion to the inside of the hole. Forming a porous metal sheet; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Characterized in that it comprises a; fusion sheet forming step having a size of 0.01mm ~ 0.5mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

In accordance with a fourth embodiment of the present invention for achieving the above object, a method for manufacturing an electromagnetic wave absorbing extinction and shielding fusion sheet, the method for producing an electromagnetic wave absorbing extinction and shielding fusion sheet, the density of 0.1g graphite substrate A step of preparing a pseudo-graphite graphite sheet having a sheet form in which a crystal structure having a range of / cm 3 to 1.5g / cm 3 is incomplete; Forming a multi-porous metal sheet having a net shape in which a void is formed between the vertical wire and the horizontal wire in such a way that the vertical wire and the horizontal wire made of a metal having a circular cross section cross each other; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and then press-molded so that the graphite crystals constituting the graphite sheet are integrally attached and bonded together while being impregnated into the surface pores of the multi-porous metal sheet. It characterized in that it comprises a step of forming a fusion sheet having a size of 0.01mm ~ 0.5mm while the pressure molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

According to a first aspect of the present invention, there is provided a method for manufacturing a heat dissipating fusion sheet for an electronic device, in which a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3 is incomplete. Preparing a pseudo-graphite sheet having a sheet form in a state; Copper, tin-based, zinc-based, aluminum-based, stainless-based metal powders having a melting temperature of 300 ° C. to 1800 ° C., wherein the metal powder has a particle size of 1 μm to 200 μm that is higher than the melting temperature. Forming a multi-porous metal sheet which is a porous porous sintered body having pores of 0.001 mm to 3.0 mm pores by heating 10 minutes to 300 minutes under a condition of ˜30% low temperature; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. It characterized in that it comprises a step of forming a fusion sheet having a size of 0.001mm ~ 0.05mm void while being press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

According to a second aspect of the present invention, there is provided a method of manufacturing a high heat dissipation fusion sheet according to a second embodiment of the present invention, in which a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3 is incomplete. Preparing a pseudo-graphite sheet having a sheet form in a state; Applying a conductive solution to the outer surface of the plate-shaped molding frame formed of a resin that is vaporized or liquefied at a high temperature to form a conductive layer, and immersed and energized it in an electroforming tank to electrodeposit metal to form an electrodeposition layer, and then heating the mold. Forming a pseudo-porous multi-porous metal sheet formed by removing resin; Forming the multi-porous metal sheet by pressing the caustic multi-porous metal sheet once to 10 times so as to have a thickness of 0.01 mm to 50 mm; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Characterized in that it comprises a; fusion sheet forming step having a size of 0.001mm ~ 0.05mm void while being press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

According to a third aspect of the present invention, there is provided a method of manufacturing a high heat dissipation fusion sheet for an electronic device, in which a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3 is incomplete. Preparing a pseudo-graphite sheet having a sheet form in a state; A sheet member in which a pore hole is formed by punching, laser, or etching in a thin plate made of copper, tin, zinc, aluminum, or stainless steel, wherein the pore hole is attached to the pseudo-graphite sheet by pressing. In order to prevent the crystal structure from being broken, a curved portion forming a curved shape with the surface is formed on the one surface to which the caustic graphite sheet is attached, and an inclined surface portion that gradually decreases in diameter while proceeding from the curved portion to the inside of the hole. Forming a porous metal sheet; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Characterized in that it comprises a; fusion sheet forming step having a size of 0.001mm ~ 0.05mm void while being press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a high heat dissipation fusion sheet according to a fourth embodiment of the present invention, in which a crystal structure having a graphite substrate having a density of 0.1 g / cm 3 to 1.5 g / cm 3 is incomplete. Preparing a pseudo-graphite sheet having a sheet form in a state; Forming a multi-porous metal sheet having a net shape in which a void is formed between the vertical wire and the horizontal wire in such a way that the vertical wire and the horizontal wire made of a metal having a circular cross section cross each other; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and then press-molded so that the graphite crystals constituting the graphite sheet are integrally attached and bonded together while being impregnated into the surface pores of the multi-porous metal sheet. It characterized in that it comprises a step of forming a fusion sheet having a size of 0.001mm ~ 0.05mm void while being press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3.

As a preferred feature of the method for producing an electromagnetic wave absorption extinction and shielding and high heat dissipation fusion sheet according to the present invention, following the forming step of the multi-porous metal sheet is heated for 10 to 40 minutes at 500 ℃ ~ 600 ℃ Performing an amorphous metal sheet forming step to be amorphous, and further comprising the step of attaching the molded graphite sheet to the amorphous metal sheet by compression molding.

Another desirable feature by the method for producing an electromagnetic wave absorbing extinction and shielding and high heat dissipation of the electronic device according to the present invention, pressurized or applied or impregnated to the other surface of the multi-porous metal sheet is attached to one side Forming a heat-dissipating film layer made of an organic-inorganic-based resin that is integrally formed by an impregnation to impregnate a portion of the graphite sheet on the opposite side through a gap formed on the surface of the porous metal sheet to generate a binding force; Or aluminum is formed by attaching integrally to the other surface of the multi-porous metal sheet attached to one side by pressing, applying or impregnated to one side is impregnated into the air gap formed on the surface of the multi-porous metal sheet to create a binding force Or it is configured to further comprise any one step of the heat radiation film layer forming step provided by a thin plate of aluminum alloy.

Electromagnetic wave absorption extinction and shielding fusion sheet according to the present invention and electronic device high heat dissipation fusion sheet, a porous base metal sheet made of a porous porous metal as a base material, one side of the outer surface is molded in an incomplete crystal structure By pressing at a high pressure in a laminated state of a caustic graphite substrate and physically bonding together, the graphite substrate and the porous metal sheet are directly attached and connected, and thus physically solid without using an adhesive resin or a binder material. As a result of this, it is possible to secure excellent absorption and extinction performance and shielding performance against electromagnetic waves generated by electronic equipments. In addition, when applied to high heat dissipation electronics, it is transmitted from a heat source It is possible to secure a heat radiation performance to effectively dissipate the heat which is effective and able to guarantee the heat radiation performance of the higher performance of the electronic device can be expected.

That is, a pseudo-graphite graphite sheet having an incomplete crystal structure is disposed on the surface of the porous porous metal sheet, which is a porous porous metal substrate having fine pores formed therein, in a stacked form, and is pressed at a high pressure by using a press device such as a press or a roller. By pressurizing, the caustic graphite sheet and the porous metal sheet can be reliably physically integrated without using an existing adhesive resin or binder material. Therefore, the manufacturing process is simple and economical dissemination due to mass production In particular, since the graphite substrate is impregnated into the surface pores of the porous metal sheet by the pressing force, thereby maintaining a firm bonding state, it is possible to stably suppress the peeling phenomenon of the graphite substrate or the partial dropout caused by external force, thereby providing improved durability. There is an advantage to this.

In addition, the organic / inorganic / ceramic series / on the other side of the multi-porous metal sheet is not attached to the graphite sheet through the electromagnetic wave absorption extinction and shielding fusion sheet and high heat radiation fusion sheet and manufacturing method thereof according to the present invention It is possible to increase elasticity and durability by forming and integrating a resin-based composition such as graphite or a thin plate made of aluminum or aluminum alloy in a laminated form, and as a result, it is possible to apply to various electronic devices and to produce a large area sheet. There is this.

Therefore, the manufacturing process is simple and economical dissemination is possible due to mass production, and in particular, the graphite substrate is impregnated into the surface pores of the porous metal sheet due to the pressing force, so that a firm bonding state is maintained, and therefore, due to the peeling phenomenon or the external force of the graphite substrate. Partial dropout can be stably suppressed, which provides an advantage of improved durability. In addition, the electromagnetic wave absorption extinction and shielding fusion sheet according to another embodiment of the present invention and the high heat radiation fusion sheet for electronic devices is organic / inorganic / ceramic / graphite, etc. as the other side of the porous sheet metal sheet is not attached to the graphite sheet It is possible to secure excellent electromagnetic wave absorption extinction and shielding performance by stacking liquid heat dissipating resins or thin plates made of aluminum / aluminum alloy.

In addition, as the multi-porous metal sheet in the present invention is formed of a metal material, not only thermal conductivity but also durability against cracking and fracture due to external force or bending deformation are excellent, and since the liquid heat-resistant resin including graphite is impregnated into the pores, It is possible to mold in the form of a porous porous sheet having durability, it is possible to apply to a variety of electronic devices, as well as to produce a large area sheet. Therefore, it is possible to increase the product value of the product as a result of ensuring the optimal performance of the product to which it is applied.

1 is a cross-sectional view for explaining the configuration of the electromagnetic wave absorbing extinction and shielding fusion sheet and high heat radiation fusion sheet according to the present invention;

2 to 5 are views showing various embodiments of the multi-porous metal sheet in the electromagnetic wave absorbing extinction and shielding melt sheet and high heat radiation fusion sheet of the electronic device according to the present invention,

Figure 6 is a schematic cross-sectional view for explaining an application example of the electromagnetic wave absorption extinction and shielding fusion sheet and high heat radiation fusion sheet according to the present invention.

Figure 7 is an exemplary view for explaining the characteristics of the electromagnetic wave absorption and extinction and shielding fusion sheet and high heat radiation fusion sheet according to the present invention.

8 to 11 is a schematic diagram for explaining a method for manufacturing the electromagnetic wave absorption and extinction shielding fusion sheet and a high heat radiation fusion sheet according to an embodiment of the present invention.

* Explanation of Drawings

1: Fusion Sheet 10: Caustic Graphite Sheet

20: multi-porous metal sheet 20a: void 21: sintered sheet 22: electroforming sheet 23: metal sheet 23a: curved portion 23b: inclined surface portion 24: net sheet 24a: vertical wire

24b: horizontal wire 30: heat radiation layer 33: adhesive

35 metal foil 40 insulator

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the embodiment of the electromagnetic wave absorbing extinction and shielding fusion sheet and high heat dissipation fusion sheet according to the present invention, but the present invention in the specific disclosure It is not intended to be limited to the present invention, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

First, the electromagnetic wave absorption extinction and shielding fusion sheet and the high heat radiation fusion sheet of the electronic device in the present invention are both manufactured by the same configuration and manufacturing method, but there is a functional difference due to the difference in the size of the pores.

1 is a cross-sectional view for explaining the configuration of the electromagnetic wave absorption and shielding and high heat radiation fusion sheet according to the present invention, in the case of the electromagnetic wave absorption and shielding fusion sheet is formed of a graphite substrate in the form of a sheet with a density of 0.1 Multi-porous metal formed by forming a plurality of voids having a size of 0.01 mm to 0.5 mm and a pseudo-graphite graphite sheet 10 having a crystal structure in an incomplete state with a range of ~ 1.5 g / cm 3. Attached to one surface of the sheet 20 and integrally press-molded, and forming a heat dissipation film layer 30 on the outer surface thereof; and, in the case of a high heat dissipation sheet for electronic equipment, a graphite substrate is molded into a sheet form with a density of 0.1 to The pseudo-graphite graphite sheet 10 formed in an incomplete crystal structure with a range of 1.5 g / cm 3 and the pseudo-graphite sheet 10 formed by forming a plurality of pores having a size of 0.001 mm to 3.0 mm are formed. Attached to one surface of the porous metal sheet 20, and integrally press-molded to form a void 0.001mm ~ 0.05mm, the heat radiation film layer 30 is formed on the outer surface is shown.

That is, the present invention relates to an electromagnetic wave absorption extinction and shielding fusion sheet and a high heat dissipation fusion sheet, but the same configuration and manufacturing process, but the fused sheet integrally pressurized the multi-pore pore sheet and graphite sheet Depending on the size of the pores formed in the electromagnetic wave absorbing and extinguishing, shielding fusion sheet and electronic device high heat dissipation fusion sheet. In other words, the electromagnetic wave absorption extinction and shielding fusion sheet is characterized by the electromagnetic wave absorption extinction and shielding by being manufactured by integrally forming a graphite sheet on a multi-porous metal sheet having a pore size of 0.01 mm to 0.5 mm. The high heat dissipation sheet for electronic devices has a pore size of 0.001 mm to 3.0 mm in the porous metal sheet, and finally a pore size of 0.001 mm to 0.05 mm by press molding integrally with the graphite sheet. It is attached to the electronic device by being molded to have a high heat dissipation characteristics.

FIG. 2 is a view schematically illustrating a porous metal sheet provided as a sintered sheet according to the first embodiment in the electromagnetic wave absorbing extinction and shielding and high heat dissipation fusion sheet according to the present invention. In the drawing, a copper, tin, zinc, aluminum, stainless-based metal powder having a particle size of 1 μm to 200 μm is sintered by heating at a temperature of 10 to 30% lower than the melting temperature and sintered and pressurized. The multi-porous metal sheet is provided as shown, wherein the sintered sheet 21 is a particle size of 1㎛ ~ 200 of copper series, tin series, zinc series, aluminum series, stainless series having a melting temperature of 300 ℃ ~ 1800 ℃ A metal powder having a size of µm was heated for 10 minutes to 300 minutes under conditions of a temperature of 10 to 30% lower than the melting temperature. The electromagnetic wave absorption and extinction shielding fusion sheet has a pore 20a of 0.05 mm to 3.0 mm. It is molded to have, the electronic heat dissipation fusion sheet is molded to have a gap (20a) of 0.001mm ~ 3.0mm.

FIG. 3 is a view schematically illustrating a multi-porous metal sheet provided as a metal electroplating sheet according to a second embodiment in the electromagnetic wave absorbing extinction and shielding and high heat dissipation fusion sheet according to the present invention. Referring to the fusion sheet for absorbing extinction and shielding, a plate-shaped mold formed of a resin that is vaporized or liquefied at high temperature is immersed in an electrolytic bath to conduct electricity to electrodeposit metal to form an electrodeposition layer, and the electrodeposition layer is formed. The pores 20a are formed by heating the mold to remove the resin, and if necessary, pressurize about 1 to 10 times, and the porous metal sheet provided as a metal electroforming sheet 22 having a thickness of 0.01 mm to 50 mm formed into a sheet form. Is shown.

On the other hand, referring to the electronic device heat dissipation fusion sheet as a reference, in the drawings, a plate-shaped mold formed of a resin that is evaporated or liquefied at high temperature is immersed in the electrolytic bath to conduct the electrode to electrodeposit metal to form an electrodeposition layer, The mold was formed by heating the mold in which the electrodeposition layer was formed to remove the resin to form a void 20a having a size of 0.001 mm to 3.0 mm. Shown is a porous metal sheet provided as electroforming sheet 22.

4 is a view schematically illustrating a multi-porous metal sheet provided as a thin sheet according to the third embodiment in the fusion sheet for electromagnetic wave absorption and shielding and high heat radiation of the electronic device according to the present invention.

First, referring to the fusion sheet for the absorption and shielding of electromagnetic waves, as shown in the drawing is a sheet member formed by forming a pore hole by punching, laser, and etching method in a thin plate of copper, tin, zinc, aluminum, and stainless steel. The voids have curved surfaces and curved surfaces that form curved surfaces with respect to one surface to which the pseudo graphite sheet is attached so that the crystal structure is not broken while the pseudo graphite sheet is attached by pressing. The porous metal sheet, which is a metal sheet sheet 23, is formed by forming an inclined surface portion whose diameter gradually decreases while moving inward from the portion.

Next, referring to the fusion sheet for high heat dissipation of the electronic device, the drawing shows pores having a size of 0.001 mm to 3.0 mm by punching, laser, and etching methods on a thin sheet of copper, tin, zinc, aluminum, and stainless steel. A sheet member formed by forming a hole, wherein the void hole has a surface and a curved surface based on one surface to which the caustic graphite sheet is attached so that the crystal structure is not broken while the caustic graphite sheet is attached by pressing. A multi-porous metal sheet, which is a metal thin sheet 23, is formed by forming a curved surface portion and an inclined surface portion which gradually decreases in diameter while proceeding inward from the curved portion.

FIG. 5 is a schematic view illustrating a multi-porous metal sheet provided as a net sheet 24 sheet according to a fourth embodiment in the electromagnetic wave absorbing extinction and shielding and high heat dissipation fusion sheet according to the present invention. .

First, referring to the fusion sheet for electromagnetic wave absorption extinction and shielding, in the drawing, the pores 20a are interwoven between the vertical wires 24a and the horizontal wires 24b made of a metal wire having a circular cross section so as to cross each other. The multi-porous metal sheet is shown is a net sheet 24 is formed, the present invention is not only using a single metal wire to the vertical wire (24a) and the horizontal wire (24b) of the metal wire, It is also possible to weave more than one strand in the form of a net.

Subsequently, in the drawing, the net in which the pores 20a having a size of 0.001 mm to 3.0 mm are formed between the vertical wires 24a and the horizontal wires 24b made of a metal wire having a circular cross section so as to cross each other. A multi-porous metal sheet, which is a sheet 24, is shown, and the present invention uses two or more strands in addition to using a single metal wire for the vertical wire 24a and the horizontal wire 24b which are the metal wire. It will be possible to weave in the form of a twisted net.

6 is a cross-sectional view for explaining an application example of the electromagnetic wave absorbing extinction and shielding and high heat dissipation fusion sheet according to the present invention.

First, referring to the fusion sheet for electromagnetic wave absorption extinction and shielding, in the drawings, the porous metal sheet 20 made of a porous metal made of a metal having excellent thermal conductivity is used as a base, and the porous metal sheet 20 is formed as a base. In a state in which a pseudo-graphite graphite sheet made of graphite substrate having an incomplete crystal structure is laminated on one surface of the sheet, pressurizing at a high pressure by using a press device such as a press or a roller to infiltrate the inside of the porous metal sheet 20 To form an impregnated state and to form an insulating material or an adhesive component formed by coating an insulating resin composition having one or more of PVC, PC, urethane, silicone, ABS, and UV on the other surface of the porous metal sheet 20. Pressure-bonding the adhesive or the thin plate made of aluminum or aluminum alloy by applying a resin or a double-sided tape The electromagnetic wave absorbing extinction and shielding fusion sheet is formed by forming a heat radiation film layer 30 made of any one or one of the metal thin films formed therein, and an insulator 40 formed on the outer surface of the heat radiation film layer to contact an electric heat source. .

Next, referring to the fusion sheet for high heat dissipation of the electronic device, in the drawing, the porous base metal sheet 20 made of a porous metal made of a metal having excellent thermal conductivity is used as a base, and In a state in which a pseudo-graphite graphite sheet made of a graphite substrate having an incomplete crystal structure is laminated on one surface and pressed at high pressure by using a press device such as a press or a roller, part of the sheet penetrates into the porous metal sheet 20. It has an insulator or adhesive component formed in the impregnated state, and coated with an insulating resin composition of any one or more of PVC, PC, urethane, silicone, ABS, UV to the other surface of the porous metal sheet 20 Resin-coated adhesives or double-sided tapes are adhered to each other or pressure-bonded thin plates made of aluminum or aluminum alloy The heat dissipation layer for an electronic device is shown, which forms a heat dissipation layer 30 made of any one or one of the formed metal thin plates, and an insulator 40 for contacting an electric heat source on the outer surface of the heat dissipation layer 30 is shown. .

Figure 7 is an exemplary view for explaining the characteristics of the electromagnetic wave absorbing extinction and shielding and high heat dissipation fusion sheet according to the present invention.

First, referring to the electromagnetic wave absorption extinction and shielding fusion sheet as a reference, the drawing shows a configuration example in which the heat source is located on the lower side and the display is located on the lower side of the electromagnetic wave absorption extinction and shielding fusion sheet of the present invention. The transferred heat is a state in which the heat is diffused in the horizontal direction in the graphite sheet portion without being transferred to the upper side, and the fused sheet of the present invention is a net form in which a thin plate, wire, etc. are woven by sintering, metal electroforming, punching, etc. The multi-porous metal sheet 20, and the caustic graphite sheet 10 is attached to the upper portion around the multi-porous metal sheet 20 integrally by pressure molding, and a part of the crystal grains is It is impregnated through the surface side voids 15 of the porous metal sheet 20, the lower portion of the porous metal sheet 20 is an insulator of an insulating composition or A heat dissipation film layer 30 made of any one of a complex or a soft metal thin plate is formed, and the lower surface of the heat dissipation film layer 30 includes an electromagnetic wave absorbing extinction and shielding fusion sheet composed of an insulator 40 for contacting an electric heat source. Is shown.

Subsequently, referring to the electronic device high heat dissipation fusion sheet, the drawing shows a configuration example in which a heat source is located on the lower side of the high heat dissipation fusion sheet for electronic devices of the present invention and a display is positioned on the upper side. Silver is not transmitted to the upper side and the heat dissipation in the horizontal direction in the graphite sheet portion is a state showing the heat dissipation, the fusion sheet of the present invention is provided in the form of a net, a thin plate, a wire by weaving, such as sintering, metal electroforming, punching The multi-porous metal sheet 20 and the pseudo-molded graphite sheet 10 are integrally attached to the upper portion centered around the multi-porous metal sheet 20 by pressure molding, and a part of the crystal grains is formed by the multi-porous metal. It is impregnated through the surface side voids 15 of the sheet 20, the lower portion of the multi-porous metal sheet 20 is an insulator or adhesive of an insulating composition or Query the metal heat-radiating film 30 is formed by any one of the thin plate, the lower face of the heat dissipating film layer 30 is made of insulating material and electronic device 40 for contact with the electric heat source thermally fused sheet is shown.

8 to 11 are block diagrams for explaining a method for manufacturing a fusion sheet for electromagnetic wave absorption and shielding and heat radiation of the electronic device according to the present invention.

FIG. 8 illustrates the provision of a pseudo-graphite graphite sheet 10 made of gparite substrate with an incomplete crystal structure and placing the metal powder on one surface of the multi-porous metal sheet 20 formed through a sintering process. The present invention shows a method for manufacturing an electromagnetic wave absorption extinction and shielding and high heat dissipation fusion sheet using a multi-porous metal sheet prepared by attaching the metal sheet. The multi-porous metal sheet 20 is heat dissipated for contact with a heating source on the other side. The process of forming the membrane layer 30 is shown, wherein the heat dissipation membrane layer 30 is formed on the fused sheet formed by pressing the pseudo-molded graphite sheet 10 and the porous metal sheet 20, or caustic The graphite sheet 10, the porous metal sheet 20, and the heat dissipation layer 30 may be laminated and integrally press-molded.

Fig. 9 is a moldable graphite sheet 10 made of a graphite substrate with an incomplete crystal structure having a density ranging from 0.1 g / cm 3 to 1.5 g / cm 3, and a plate-shaped mold formed of a resin vaporized or liquefied at high temperature. Applying a conductive solution to the outer surface to form a conductive layer, and then immersed and energized it in the electrolytic bath to electrodeposit the metal, and then heated the mold to remove the resin to form the porous metal sheet 20 formed through the electroforming process Each process is prepared, and a process of forming a fusion sheet by attaching them to each other by integrally arranging them by pressing molding is illustrated, and the fused sheet is a porous metal sheet 20 to which the pseudo-molded graphite sheet 10 is not attached. The process of forming the heat dissipation film layer 30 for contact with the heat generating source on the other side of FIG. On the other hand, the heat dissipation layer 30 is formed on the fusion sheet formed by pressing the pseudo-molded graphite sheet 10 and the porous metal sheet 20 or the flexible graphite sheet 10 and the porous metal sheet 20 And it can be formed by stacking the heat radiation film layer 30 and integrally press molding.

Fig. 10 shows a hole in which a pore hole is formed in a thin graphite plate made of a graphite substrate and a pseudo-type graphite sheet having an incomplete crystal structure having a density ranging from 0.1 g / cm 3 to 1.5 g / cm 3. It consists of a multi-porous metal sheet 20 made of a thin sheet consisting of a curved surface portion 23a formed to form a smooth surface with a silver surface and an inclined surface portion 23b extending from the curved surface portion 23a. The multi-porous metal sheet of the graphite substrate is a crystal structure of the graphite substrate by the smooth curved portion 23a of the void 20a in the process of integrally attaching by pressing molding in a state in which the laminated sheet is laminated on one surface It is configured so as not to be broken and to increase the impregnation density by the inclined surface portion 23b.

Fig. 11 is a pseudo-graphite graphite sheet made of graphite substrate having an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3, and a vertical wire 24a and a horizontal wire 24b having a circular or elliptical cross section. ) Is composed of a multi-porous metal sheet 20 made of a net sheet (24) sheet woven in a net form to cross each other, wherein the porous metal sheet 20 is a pseudo-graphite according to the use of a wire having a circular cross section In the process of integrally molding with the sheet 10, the crystal structure of the graphite substrate is not broken and is impregnated between the nets forming the voids 20a to be integrally attached and bonded to form a fusion sheet.

With reference to the drawings, the electromagnetic wave absorbing extinction and shielding fusion sheet and the high heat dissipation fusion sheet of the electronic device according to the present invention will be described first, and then the electromagnetic wave absorption extinction and shielding fusion sheet will be described, and then for high heat radiation of the electronic device The fusion sheet will be described.

The electromagnetic wave absorbing extinction and shielding fusion sheet 1 according to the present invention is a porous metal sheet made of a metal material formed by forming a void 15 to have a curved surface without forming an edge so that the graphite crystal structure is not broken during pressurization (10) and being laminated on one surface of the multi-porous metal sheet 20 to form a graphite substrate in the form of a sheet but having a density of 0.1 to 1.5 g / cm 3, in a state in which the crystal structure is formed in an incomplete state. It is laminated on one surface of the porous metal sheet 20 and is integrally attached to the surface of the porous sheet by the pressurizing process, and is provided on the other surface of the porous metal sheet 20 by pressing or coating or impregnation. It is integrally formed and impregnated to the side of the pseudo-graphite graphite sheet 10 on the opposite side through the gap formed in the surface of the porous metal sheet 20. It consists of a heat-radiating film 30 to the resin of the metal and the inorganic binding control sequences. The present invention can be manufactured in two ways according to the physical properties of the heat radiation film layer 30, when the heat radiation film layer 30 is provided in a resin-based coating on one surface of the porous metal sheet 20 In the case of attaching in a shape, the multi-porous metal may be integrally formed by press molding in a state in which the dummy graphite sheet 10 is laminated on one surface of the multi-porous metal sheet 20 on which the plurality of voids 20a are formed. A method of integrally attaching a resin-based composition constituting the heat dissipation layer 30 to the other surface of the sheet 20 through a coating, spraying, or impregnation method, and the heat dissipation layer 30 is made of aluminum or an aluminum alloy. In the case where it is provided as the laminated porous sheet 10 and the heat-radiating film layer 30 on one side and the other surface of the multi-porous metal sheet 20, respectively, to form them integrally by pressing molded at once There is a way.

Caustic graphite sheet 10 is a pseudo-molded graphite substrate having a sheet form, wherein the graphite substrate is one of the allotropes of carbon, compression-molded graphite or graphite powder produced in nature or artificially produced, or A mixture using graphite composition in which any one or at least one of organic, inorganic, and ceramic is formed in graphite, or a mixture of heat-dissipating resin in which at least one of organic, inorganic, and ceramic is formed in graphite. It may be provided in any one of. The caustic graphite sheet 10 is formed by forming the sheet metal sheet 23 in the form of a sheet, and has a density of 0.1 to 1.5 g / cm 3, so that the crystal structure is not completely bonded and has an incomplete state. . This is to allow the crystal structure to be densely pressed by press molding in a state of being laminated on one surface of the porous metal sheet 20 to be described later. If the pseudo-molded graphite sheet 10 has a dense structure state, that is, a density of 1.6 g / cm 3 or more, it is determined by the pressing force when it is integrally pressed in a state laminated on the porous metal sheet 20 to be described later. Since the structure is broken, the thermal conductivity and thermal diffusivity in the plane direction of the graphite sheet are poor.

Multi-porous metal sheet 20 is a sheet material having a thickness of 0.01 ~ 0.5mm, formed by forming a gap (20a) consisting of fine holes or gaps connected to the upper and lower surfaces, the void 20a at this time is even It is distributed and has a size of 0.01mm ~ 3.0mm connected to upper and lower surfaces. The multi-porous metal sheet 20 is preferably provided as a metal material having good thermal conductivity and elasticity against external force as a metal, and the metal has an absorbing and extinguishing function for electromagnetic waves when pores are formed. As the shielding performance can be secured in the low frequency band, the present invention proposes that the size of the pores 20a connected to the upper and lower surfaces of the multi-porous metal sheet 20 is 0.01 mm to 3.0 mm. It was. When the size of the pore 20a is less than 0.01 mm, the impregnation rate of the graphite substrate, which is a high-performance electromagnetic wave shielding material, is too low due to the micropores, and as a result, there is a closed end that the electromagnetic wave shielding performance is also lowered, and the size of the pore 20a is 3 mm. If it exceeds, the graphite substrate is impregnated to maintain a solid binding state and the closed end is removed or peeled off from the porous metal sheet 20. Therefore, the present invention proposes that the size of the pores 20a of the multi-porous metal sheet 20 is 0.01 mm to 3 mm, more preferably 0.05 mm to 1.0 mm. The multi-porous metal sheet 20 may be a metal sheet of various forms as long as it has a feature of being provided with a metal sheet formed with a gap 20a formed of fine holes or gaps, but a pseudo-ply laminated on one surface. The voids 20a to which the pseudo-graphite sheet 10 is in contact with the graphite sheet 10 so as not to break the crystal structure of the pseudo-graphite sheet 10 during pressurization have a rounded shape without a corner, that is, a smooth curved surface. It should be formed to have.

Meanwhile, the multi-porous metal sheet 20 according to the present invention is manufactured by drilling a hole in the sintered sheet 21 manufactured by the sintering process, the metal electroplated sheet 22 manufactured by the metal electroforming method, and the metal thin plate. Metal sheet sheet 23, which is to be provided as a net sheet 24 is produced by weaving a wire in the form of a net, and will be described briefly below the various manufacturing methods of the porous metal sheet 20.

First, as shown in FIG. 2, the sintered sheet 21 is sintered so that the powders are connected to each other without being completely melted by heating a metal powder having a particle size of 1 μm to 200 μm at a temperature lower than the melting temperature. It is a sheet | seat material formed by pressing. That is, the sintered sheet 21 is a metal powder of copper, tin-based, zinc-based, aluminum-based, stainless-based, such as copper having a melting temperature of 300 ℃ ~ 1800 ℃ while having a size of 1 ~ 200 ㎛, outside And then sintered by heating it at a temperature of about 10% to 30% lower than the melting temperature for 10 minutes to 300 minutes and then using a press or a pressurizing equipment such as a roller at a pressure of 30 MPa to 300 MPa once to several times It is manufactured in the form of a sheet by pressing and forming a plurality of pores (20a) having a size of 0.01mm to 3.0mm connected to the upper and lower surfaces having a thickness of 0.01 ~ 0.5mm.

Second, as shown in FIG. 3, the metal electrolytic aid sheet 22 is immersed in an electrolytic bath by immersing a plate-shaped mold formed of a resin that is vaporized or liquefied at a high temperature in an electrolytic bath to electrodeposit metal to form an electrodeposition layer. The mold for forming the electrodeposition layer was heated to remove the resin to form the voids 20a. If necessary, the electrode was pressurized 1 to 10 times to provide a metal electroforming sheet 22 formed in a sheet form with a thickness of 0.01 mm to 50 mm. .

Third, the metal sheet 23 is a sheet member formed by forming a hole in the thin plate made of copper, tin, zinc, aluminum, stainless-based metal material by punching, laser, etching method as shown in FIG. The pore hole is a curved portion and a curved portion that forms a curved surface with the surface on one side to which the pseudo-graphite graphite sheet is attached so that the crystal structure is not broken while the pseudo-graphite sheet is attached by press molding. It is provided as a multi-porous metal sheet, which is a metal sheet sheet 23 formed by forming an inclined surface portion which gradually decreases in diameter while advancing inward.

Fourth, as shown in FIG. 5, as shown in FIG. 5, the space | gap 20a is formed between the vertical wire | line wire 24a and the horizontal wire | wire 24b which are made of the metal wire of a circular cross section so that they may cross each other. There is shown a multi-porous metal sheet is a net sheet 24, the present invention is a plurality of strands or more in addition to using a single metal wire for the vertical wire (24a) and the horizontal wire (24b) of the metal wire It is also possible to weave the vertical wires and the horizontal wires in the form of a twisted strand of wire.

As described above, the multi-porous metal sheet 20 manufactured by various manufacturing methods may be adjusted by pressing one or several times by using a pressing device such as a press or a roller.

The heat dissipation layer 30 is provided in a laminated form on the other side of the multi-porous metal sheet 20 opposite to the pseudo-molded graphite sheet 10 and is integrally formed by pressing, coating, or impregnation. A part of the metal and organic-inorganic resin is impregnated to the opposite side of the graphite sheet 10 through the gap formed on the surface of the multi-porous metal sheet 20 to generate a binding force. The heat dissipation layer 30 is formed integrally attached to the surface of the multi-porous metal sheet 20, by coating an insulating resin composition of any one or more of PVC, PC, urethane, silicon, ABS, UV Either the formed insulating material or an adhesive formed by applying a resin having an adhesive component or an adhesive formed by attaching a double-sided tape, or a part thereof by pressure bonding with the porous metal sheet 20 while improving heat dissipation characteristics. Any one of the metal thin plates formed by attaching a thin plate made of soft aluminum or an aluminum alloy impregnated into the surface pores 20a of the multi-porous metal sheet 20 may be used or may be composed of a plurality of layers. That is, the heat dissipation film layer 30 in the present invention is arranged in a stacked form on the lower surface side where a heat source (not shown) is located around the porous metal sheet 20, as shown in FIG. 30 may be provided in the form of a single layer of the resin-based insulator or adhesive or adhesive or aluminum sheet, as shown in Figure 6 and 7 as the lower surface of the porous metal sheet 20, the heat source is located A heat insulating film layer 30 made of a resin series or a thin aluminum sheet is laminated, and an insulating material layer 40 formed by coating an insulating resin composition having one or more of PVC, PC, urethane, silicone, ABS, and UV on the bottom surface thereof. It is also possible to comprise a multilayer.

Hereinafter, various manufacturing methods of the electromagnetic wave absorbing extinction and shielding fusion sheet according to the present invention will be described.

First Embodiment-Referring to FIG. 8, a method of manufacturing a fusion sheet for absorbing and shielding electromagnetic waves according to a first embodiment of the present invention includes a caustic graphite sheet preparation step (s10) and a sintered sheet 21. The multi-porous metal sheet forming step (s20), the fusion sheet forming step (s30), the heat dissipation thin film forming step (s40).

The caustic graphite sheet preparing step (s10) is a graphite-based graphite or graphite powder is compression-molded, or the graphite composition or graphite in which any one or more of organic, inorganic, ceramic-based to graphite, or organic-based, A graphite substrate composed of a mixture obtained by mixing a heat-dissipating resin of one or more of inorganic and ceramic series is prepared, and the crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3 is incomplete. Caustic in sheet form. In this case, the caustic molding method may be manufactured by various known methods, and thus detailed description thereof will be omitted.

In the multi-porous metal sheet forming step (s20), first, a copper-based, tin-based, zinc-based, aluminum-based, stainless-based metal powder having a melting temperature of 300 ° C. to 1800 ° C. is prepared, but the particle size of the metal powder is The thing which has the magnitude | size of 1 micrometer-200 micrometers is prepared. Subsequently, the prepared metal powder is filled into a mold providing a molding space for forming a thin film material of a flat plate, and heated for 10 minutes to 300 minutes at a temperature 10% to 30% lower than the melting point for each melting characteristic of the material of the metal powder. And sinter molding to manufacture the sintered sheet 21. In the sintered sheet 21, the interface surfaces of the metal powders are stably fused to each other to form a uniform gap 20a.

In the forming of the fused sheet (s30), the graphite crystals constituting the graphite sheet are pressed by pressing the dummy graphite sheet 10 on one surface of the multi-porous metal sheet 20 so that the polycrystalline metal is Impregnated and bonded integrally while being impregnated into the surface voids of the sheet, while being press-molded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3, it is molded to have a size of 0.01 mm to 0.5 mm. That is, by pressurizing the multi-porous metal sheet 20, which is the sintered sheet 21, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressurizing device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, it is pressed to a thickness of 0.01mm ~ 50mm to form a fusion sheet. Here, various pressing apparatuses may be used as a pressing method for the laminated structure of the multi-porous metal sheet 20 and the caustic graphite sheet 10, which is the sintered sheet 21, and in the present invention, a press machine or a roller pressing method It is suggested that rolling and rolling mills be used, and may be repeated 1 to 20 times depending on the requirements of the resultant and the performance of the press. Meanwhile, the fusion sheet press-molded by the press or roller pressing / rolling press is preferably pressed to flatten the upper and lower surfaces. As the sintered density increases during the pressing process, the bonding force between the metal powders increases. As a result, durability and elasticity are increased. In addition, the process may be performed at room temperature, but is preferably performed at a low temperature of 40% or less based on the sintering temperature of the metal powder.

On the other hand, the amorphous metal sheet forming process of heating and amorphous for 10 to 40 minutes at 500 ℃ to 600 ℃ in the process before attaching the caustic graphite sheet 10 to the multi-porous metal sheet 20 of the sintered sheet 21 It is also possible to perform a further, it may be possible to be carried out by attaching the pseudo-molded graphite sheet to the amorphous metal sheet after the molding process by compression molding.

The heat radiation film layer forming step (s40) is a process of stacking the heat radiation film layer on the other surface of the multi-porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally. Meanwhile, the heat dissipation layer may be a composition comprising one or more of organic, inorganic, and ceramic, a graphite composition mixed with some graphite, or a thin sheet of soft aluminum or aluminum alloy. In accordance with the properties of the material used, it can be integrally formed in the multi-porous metal sheet through the method of coating, impregnation, spray, pressure.

In addition, the present embodiment illustrates that the heat-resistant film layer 30 is formed on the fusion sheet integrally bonded by pressing the multi-porous metal sheet 20 and the caustic graphite sheet 10 which are the sintered sheets 21 to each other. However, the present invention is not limited thereto, and the multi-porous metal sheet 20, the pseudo-graphite sheet 10, and the heat dissipation layer 30, which are the sintered sheet 21, may be laminated and integrally formed through a pressing process. It will be possible.

Second Embodiment-Referring to FIG. 9, a method of manufacturing a fusion sheet for absorbing and shielding electromagnetic waves according to a second embodiment of the present invention includes a step of preparing a pseudo-graphite graphite sheet (s11) and an electroforming sheet (22). It consists of a multi-porous metal sheet forming step (s21), a fusion sheet forming step (s31), a heat radiation thin film forming step (s41).

The provisional type graphite sheet preparing step (s11) is similar to the configuration of the first embodiment described above. That is, the graphite-based graphite or graphite powder is press-molded, or the graphite composition or graphite-based organic composition, inorganic series, ceramic series, or any one or more of organic series, inorganic group, ceramic series, or graphite. A graphite substrate made of a mixture obtained by mixing at least one heat-dissipating resin is prepared, and this is temporarily molded in the form of a sheet having an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3. In this case, the caustic molding method may be manufactured by various known methods, and thus detailed description thereof will be omitted.

In the forming of the multi-porous metal sheet (s21), a completed multi-porous metal sheet is manufactured by molding a caustic multi-porous metal sheet of a metal electroforming method and then pressing it several times through a pressing process. That is, when the multi-porous metal sheet forming step in the present embodiment will be described in detail, first, a current-carrying layer is formed by applying a current-carrying fluid to the outer surface of a plate-shaped mold formed from a resin that is vaporized or liquefied at a high temperature, thereby forming an electric current layer. Dip the mold into the electrolytic tank. Then, when the mold is formed with the conductive layer immersed in the electroforming tank, the metal is electrodeposited to form the electrodeposition layer. Subsequently, when the mold for which the electrodeposition layer is formed is taken out of the electroforming tank and heated to a predetermined temperature, the mold for molding of resin is removed while melting, resulting in a caustic porous metal sheet composed of an electrodeposition layer having voids formed thereon. Thereafter, by pressing the caustic multi-porous metal sheet by using a pressurizing device such as a roller or a press about 1-10 times to form a thickness of 0.01 mm to 50 mm, the molding of the multi-porous metal sheet is completed.

The fusion sheet forming step (s31) is a graphite constituting the graphite sheet by pressing in a state in which the dummy graphite sheet 10 is laminated on one surface of the multi-porous metal sheet 20 manufactured by the electroforming method The crystals are integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet, and are molded to have a size of 0.01 mm to 0.5 mm while being press-molded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3. . That is, the pressure is applied to the multi-porous metal sheet 20, which is the electroformed cast sheet 22, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressurizing device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, the resultant is pressurized to have a thickness of 0.01 mm to 50 mm to form a fusion sheet. Here, various pressing apparatuses may be used as a pressing method for the laminated structure of the multi-porous metal sheet 20 and the caustic graphite sheet 10 of the electroforming sheet 22, and in the present invention, a pressing machine or a roller pressing method. It is suggested that the in-rolling and rolling mill be used, and may be repeated 1 to 20 times depending on the requirements of the resultant and the performance of the press.

Meanwhile, the fusion sheet press-molded by the press or roller pressing / rolling press is preferably pressed to flatten the upper and lower surfaces. As the pore density increases during the pressing process, the bonding force between the metal powders increases. As a result, durability and elasticity are increased. In addition, the process may be performed at room temperature, but is preferably performed at a low temperature of 40% or less based on the sintering temperature of the metal powder. In addition, an amorphous metal sheet is formed by heating the amorphous porous sheet 10, which is the electroformed cast sheet 22, to an amorphous state by heating at 500 ° C to 600 ° C for 10 to 40 minutes in a process before attaching the pseudo-molded graphite sheet 10. It is also possible to perform the process further, it may also be carried out by attaching the pseudo-moulded graphite sheet to the amorphous metal sheet after the molding process by compression molding.

The heat dissipation layer forming step (s41) is a process of stacking the heat dissipation layer on the other surface of the porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally. On the other hand, the heat dissipation layer is a composition of any one or more of organic, inorganic, ceramic-based, or a graphite composition in which some of the graphite is mixed in such a composition, or a thin plate made of soft aluminum or aluminum alloy. It can be used, and is integrally formed in the porous metal sheet through the method of coating, impregnation, spray, pressure depending on the physical properties of the material used.

In addition, in this embodiment, the multi-porous metal sheet 20 and the pseudo-graphite graphite sheet 10, which are the electro-forming sheets 22, are formed by forming a heat-dissipating film layer 30 on the fusion sheet which is integrally bonded to each other by pressing the primary. Exemplary embodiments of the present invention are not limited thereto, but the multi-porous metal sheet 20, the pseudo-graphite sheet 10, and the heat dissipation layer 30, which are the electroforming sheets 22, are laminated and integrally formed through a pressing process. It would be possible.

Third Embodiment-Referring to FIG. 10, a method of manufacturing a fusion sheet for absorbing and shielding electromagnetic waves according to a third embodiment of the present invention includes a caustic graphite sheet preparing step (s12) and a metal thin sheet (23). It consists of a multi-porous metal sheet forming step (s22), a fusion sheet forming step (s32), a heat radiation thin film forming step (s42).

The caustic graphite sheet preparation step (s12) is a compression-molded graphite or graphite powder as a substrate, or an organic series, inorganic to a graphite composition or graphite formed of one or more of organic, inorganic, and ceramic based on graphite. A graphite substrate composed of a mixture of heat dissipating resins in which any one or more of the series and the ceramic series is formed is prepared, and the sheet having an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3 is prepared. Prune in shape. In this case, the caustic molding method may be manufactured by various known methods, and thus detailed description thereof will be omitted.

In the multi-porous metal sheet forming step (s22), a metal sheet sheet 23 formed by forming a hole in a metal sheet is used, and the metal sheet sheet 23 is made of copper, tin, zinc, aluminum, stainless-based metal materials. It is a sheet member formed by molding a hole for forming voids using any one of a punching, laser, and etching method on a thin plate made of steel. In this case, the voids 25, which are holes formed in the metal thin sheet 23, should be provided so that their crystal structures are not broken in a state in which the caustic graphite sheet 10 is attached by pressure molding. The curved portion 23a which forms a curved surface with the surface based on one surface to which the caustic graphite sheet 10 is attached, and an inclined surface that gradually decreases in diameter while proceeding to the inside of the hole in the curved portion 23b. It was proposed to form part 23b. That is, the metal thin sheet 23 may be used as a sheet metal sheet formed of a metal sheet having a gap (20a) formed of fine holes or gaps may be used in various forms, but only one surface Connected to the voids 20a and the voids 25 in which the pseudo-graphite sheet 10 is in contact with each other so as not to break the crystal structure of the pseudo-graphite sheet 10 in the pressurized process with the pseudo-type graphite sheet 10 laminated thereon. The faces to be formed should be formed to have a rounded shape without a corner as a whole, that is, a smooth curved surface.

In the forming of the fusion sheet (s32), the graphite sheet is pressed by pressing the temporary graphite sheet 10 on one surface of the porous metal sheet 20 provided as the metal sheet 23. The graphite crystals are integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet, and have a size of 0.01 mm to 0.5 mm while being press-molded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3. It is molded to have. That is, the pressure is applied to the multi-porous metal sheet 20, which is the metal thin sheet 23, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressure device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, the resultant is pressurized to have a thickness of 0.01 mm to 50 mm to form a fusion sheet. Here, various pressing apparatuses may be used as a pressing method for the laminated structure of the multi-porous metal sheet 20 and the caustic graphite sheet 10, which are the metal thin sheets 23, and in the present invention, a press machine or a roller pressing method. It is suggested that the in-rolling and rolling mill be used, and may be repeated 1 to 20 times depending on the requirements of the resultant and the performance of the press. Meanwhile, the fusion sheet press-molded by the press or roller pressing / rolling press is preferably pressed to flatten the upper and lower surfaces. As the pore density increases during the pressing process, the bonding force between the metal powders increases. As a result, durability and elasticity are increased. In addition, the process may be performed at room temperature, but is preferably performed at a low temperature of 40% or less based on the sintering temperature of the metal powder. In addition, the amorphous metal sheet forming process of heating the amorphous metal sheet for 10 to 40 minutes at 500 ° C. to 600 ° C. in the step before attaching the pseudo-molded graphite sheet 10 to the multi-porous metal sheet that is the metal thin sheet 23 is further performed. The amorphous metal sheet may be attached to the amorphous graphite sheet after the molding process, and may be carried out by compression molding.

The heat dissipation layer forming step (s42) is a process of stacking the heat dissipation layer on the other surface of the multi-porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally. On the other hand, the heat dissipation layer is a composition of any one or more of organic, inorganic, ceramic, or a ceramic composition, or a graphite composition in which some of the graphite is mixed in such a composition, or a thin plate made of soft aluminum or aluminum alloy. It can be used, and is integrally formed in the porous metal sheet 20 through the method of coating, impregnation, spray, pressure depending on the physical properties of the material used.

In addition, in the present embodiment, the multi-porous metal sheet 20, which is the metal thin sheet 23, and the pseudo-molded graphite sheet 10 are primarily formed by forming a heat dissipation film layer 30 in a fusion sheet integrally bonded to each other. Exemplary embodiments of the present invention are not limited thereto, but the multi-porous metal sheet 20, the pseudo-graphite sheet 10, and the heat dissipation layer 30, which are the metal thin sheet 23, are laminated and integrally formed through a pressing process. It would be possible.

Fourth Embodiment-Referring to FIG. 11, a method of manufacturing a fusion sheet for absorbing and shielding electromagnetic waves according to a fourth embodiment of the present invention includes a step of preparing a caustic graphite sheet (s13) and a metal thin sheet (23). It consists of a multi-porous metal sheet forming step (s23), a fusion sheet forming step (s33), a heat radiation thin film forming step (s43).

The caustic graphite sheet preparation step (s13) is a compression-molded graphite or graphite powder as a base material, or an organic series, inorganic to a graphite composition or graphite formed of any one or more of organic, inorganic, and ceramic based on graphite. A graphite substrate composed of a mixture of heat dissipating resins in which any one or more of the series and the ceramic series is formed is prepared, and the sheet having an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3 is prepared. Prune in shape. In this case, the caustic molding method may be manufactured by various known methods, and thus detailed description thereof will be omitted.

The multi-porous metal sheet forming step (s23) is made by weaving the vertical wire 24a and the horizontal wire 24b made of a metal having a circular cross section to cross each other, between the vertical wire 24a and the horizontal wire 24b. A net sheet 24 in the form of a net or net in which voids are formed is used. Meanwhile, in addition to using a single metal wire, the vertical wire 24a and the horizontal wire 24b, which are the metal wires, may also be braided into each other using a twisted wire made by twisting two or more strands together. It will be possible. In addition, the net sheet 24 may further perform a pressing process using a roller or a press machine to reduce the thickness thereof.

In the forming of the fused sheet (s33), the graphite sheet 10 is formed by pressing the dummy graphite sheet 10 on a surface of the multi-porous metal sheet 20 provided as the net sheet 24 in a state of being laminated. The graphite crystals are impregnated in the surface pores of the multi-porous metal sheet to be integrally attached and bonded, and pressurized to have a density of 1.6 g / cm 3 to 6.0 g / cm 3 while having a size of 0.01 mm to 0.5 mm. Molded. That is, by pressurizing the porous sheet metal sheet 20, which is the net sheet 24, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressurizing device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, it is pressed to a thickness of 0.01mm ~ 50mm to form a fusion sheet. Here, various pressing apparatuses may be used as a pressing method for the laminated structure of the multi-porous metal sheet 20 and the caustic graphite sheet 10, which is the net sheet 24, and in the present invention, a pressing machine or a roller pressing method may be used. It is suggested that rolling and rolling mills be used, and may be repeated 1 to 20 times depending on the requirements of the resultant and the performance of the press. Meanwhile, the fusion sheet press-molded by the press or roller pressing / rolling press is preferably pressed to flatten the upper and lower surfaces. As the pore density increases during the pressing process, the bonding force between the metal powders increases. As a result, durability and elasticity are increased. In addition, the process may be performed at room temperature, but is preferably performed at a low temperature of 40% or less based on the sintering temperature of the metal powder. In addition, the amorphous metal sheet forming process of heating the amorphous metal sheet 20 to 10-40 minutes at 500 ° C to 600 ° C in the process before attaching the pseudo-molded graphite sheet 10 to the multi-porous metal sheet 20 that is the net sheet 24 It is also possible to perform a further, it may be possible to be carried out by attaching the pseudo-molded graphite sheet to the amorphous metal sheet after the molding process by compression molding.

The heat dissipation layer forming step (s42) is a process of stacking the heat dissipation layer on the other surface of the multi-porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally. On the other hand, the heat dissipation layer 30 may be a composition of any one or more of organic, inorganic, and ceramic, or a graphite composition in which some of the graphite is mixed into the composition, or a soft aluminum or aluminum alloy. The thin plate may be used, and is integrally formed with the multi-porous metal sheet 20 by applying, impregnating, spraying, or pressing according to the properties of the material used. In addition, in the present embodiment, an example in which the heat dissipation layer 30 is formed on the fusion sheet integrally bonded by pressing the multi-porous metal sheet 20 and the caustic graphite sheet 10 which are the net sheets 24 to each other is primarily illustrated. However, the present invention is not limited thereto, and the multi-porous metal sheet 20, the pseudo-graphite sheet 10, and the heat dissipation film layer 30, which are the net sheets 24, may be laminated and integrally formed through a pressing process. It will be possible.

The manufacturing method of the electromagnetic wave absorption extinction and shielding fusion sheet applying the multi-porous metal sheet 20 manufactured by various manufacturing processes as described above is simple in the manufacturing process, and economical production is possible through mass production, In the process of forming the fused sheet by pressing together with the porous metal sheet 20 in the crystal structure of the graphite sheet 10 to form a fused sheet, the graphite crystals constituting the temporary graphite sheet 10 may be formed of the porous metal sheet 20. Impregnated with voids 25) to maintain a solid binding force and to improve the absorption and shielding performance of electromagnetic waves, and is formed on the other surface of the porous metal sheet 20 opposite to the temporary graphite sheet 10. The heat dissipation layer 30 is also impregnated to the pseudo-graphite sheet 10 side through the air gap 25 so that the physically solid integration is achieved do.

Hereinafter, with reference to FIGS. 1 to 11 will be described in connection with the electronic device high heat dissipation fusion sheet according to the present invention and a method for manufacturing the same, the electromagnetic wave absorption extinction and shielding fusion sheet and the method of manufacturing the same Since only the size of the space | gap formed in the sheet differs, the same structure is attached | subjected and demonstrated, and the overlapping description was abbreviate | omitted.

The electronic device high heat dissipation fusion sheet 1 according to the present invention is a multi-porous metal sheet made of a metal material formed by forming a void 15 to have a curved surface without forming an edge so that the graphite crystal structure is not largely broken in the pressing process ( 10) to be laminated on one surface of the multi-porous metal sheet 20 to form a graphite substrate in the form of a sheet to have a density of 0.1 ~ 1.5g / cm 3 in the crystal structure is formed in an incomplete state in the state It is laminated on one surface of the metal sheet 20 and is integrally attached through a pressurizing process, and is provided with a pressurized graphite sheet 10 and optionally provided by being laminated on the other surface of the multi-porous metal sheet 20. Alternatively, the impregnated graphite is formed integrally by impregnation, and a part thereof is formed on the surface of the multi-porous metal sheet 20 through the pores formed on the opposite side. It consists of the heat radiation film layer 30 which consists of a metal and organic-inorganic series resin impregnated and bound by the sheet | seat 10 side. Wherein the multi-porous metal sheet 20 is integrally attached and bonded so as to have a density 1.6g / cm 3 ~ 6.0g / cm 3 with the pseudo-molded graphite sheet to form a plurality of 0.001mm ~ 0.05mm pores connected to the upper and lower surfaces Has characteristics. The present invention can be manufactured in two ways according to the physical properties of the heat radiation film layer 30, when the heat radiation film layer 30 is provided in a resin-based coating on one surface of the porous metal sheet 20 In the case of attaching in a shape, the multi-porous metal may be integrally formed by press molding in a state in which the dummy graphite sheet 10 is laminated on one surface of the multi-porous metal sheet 20 on which the plurality of voids 20a are formed. A method of integrally attaching a resin-based composition constituting the heat dissipation layer 30 to the other surface of the sheet 20 through a coating, spraying, or impregnation method, and the heat dissipation layer 30 is made of aluminum or an aluminum alloy. In the case where it is provided as the laminated porous sheet 10 and the heat-radiating film layer 30 on one side and the other surface of the multi-porous metal sheet 20, respectively, to form them integrally by pressing molded at once There is a way.

Caustic graphite sheet 10 is similar to the configuration of the above-described fusion sheet for absorbing and extinguishing electromagnetic waves, detailed description thereof will be omitted.

The multi-porous metal sheet 20 is a sheet member having a thickness of 0.01 mm to 50 mm, and is formed by forming a gap 20a formed of minute holes or gaps connected to the upper and lower surfaces, and the voids 20a at this time are evenly formed. It is distributed and has a size of 0.001mm ~ 3.0mm connected to the top and bottom. The multi-porous metal sheet 20 is preferably provided as a metal material having good thermal conductivity and elasticity against external force as a metal, and the metal has an absorption and extinction function for electromagnetic waves when pores are formed, in particular, heat dissipation characteristics in the voids. The smaller the superior graphite substrate is, the more excellent the shielding performance can be secured in the low frequency band. Thus, in the present invention, the size of the pores 20a connected to the upper and lower surfaces of the multi-porous metal sheet 20 is increased. It proposed that it is 0.001mm-3.0mm.

If the size of the pore 20a is less than 0.001mm, not only is it difficult to process due to micropores, but also the impregnation rate of the graphite substrate, which is a heat-dissipating material, is too low, and as a result, the heat dissipation performance is lowered. If the size exceeds 3mm, the graphite substrate is impregnated, and thus, a closed end may be caused to fall off or peel off from the porous metal sheet 20 without maintaining a solid binding state. Therefore, the present invention proposes that the size of the pore 20a of the multi-porous metal sheet 20 is 0.001 mm to 3 mm. The multi-porous metal sheet 20 may be a metal sheet of various forms as long as it has a feature of being provided with a metal sheet formed with a gap 20a formed of fine holes or gaps, but a pseudo-ply laminated on one surface. The voids 20a to which the pseudo-graphite sheet 10 is in contact with the graphite sheet 10 so as not to break the crystal structure of the pseudo-graphite sheet 10 during pressurization have a rounded shape without a corner, that is, a smooth curved surface. It should be formed to have.

First, as shown in FIG. 2, the sintered sheet 21 is sintered so that the powders are connected to each other without being completely melted by heating a metal powder having a particle size of 1 μm to 200 μm at a temperature lower than the melting temperature. It is a sheet | seat material formed by pressing. That is, the sintered sheet 21 is a metal powder of copper, tin-based, zinc-based, aluminum-based, stainless-based, such as copper having a melting temperature of 300 ℃ ~ 1800 ℃ while having a size of 1 ~ 200 ㎛, outside And then sintered by heating it at a temperature of about 10% to 30% lower than the melting temperature for 10 minutes to 300 minutes and then using a press or a pressurizing equipment such as a roller at a pressure of 30 MPa to 300 MPa once to several times It is manufactured in the form of a sheet by pressing and forming a plurality of voids (20a) having a size of 0.001mm ~ 3.0mm connected to the upper and lower surfaces having a thickness of 0.01mm ~ 50mm.

Second, as shown in FIG. 3, the metal electrolytic aid sheet 22 is immersed in an electrolytic bath by immersing a plate-shaped mold formed of a resin that is vaporized or liquefied at a high temperature in an electrolytic bath to electrodeposit metal to form an electrodeposition layer. The mold was formed by heating the mold in which the electrodeposition layer was formed to remove the resin to form a void 20a having a size of 0.001 mm to 3.0 mm. Shown is a porous metal sheet provided as electroforming sheet 22.

Third, as shown in FIG. 4, the metal sheet 23 is a hole having a size of 0.001 mm to 3.0 mm by punching, laser, and etching in a thin sheet of copper, tin, zinc, aluminum, or stainless steel based metal material. Wherein the pore hole is formed on the surface and curved surface of the void based on one surface to which the pseudo-graphite graphite sheet is attached so that the crystal structure is not broken while the pseudo-graphite sheet is attached by pressing. The perforated metal sheet, which is a metal sheet sheet 23, is formed by forming a curved surface portion and an inclined surface portion which gradually decreases in diameter while proceeding inward from the curved portion.

Fourth, as shown in Fig. 5, the net sheet 24 has a length of 0.001 mm to 3.0 mm between the vertical wire 24a and the horizontal wire 24b made of a metal wire having a circular cross section so as to cross each other. A multi-porous metal sheet is shown, which is a net sheet 24 in which a pore 20a having a size is formed. The present invention uses a single metal wire for the vertical wire 24a and the horizontal wire 24b, which are the metal wires. In addition to the two or more strands in the form of twisted vertical wires and horizontal wires may be intertwined in the form of a net. As described above, the multi-porous metal sheet 20 manufactured by various manufacturing methods may be pressurized once or several times using a pressing device such as a press or a roller to adjust the thickness and the size of the pores.

The heat dissipation layer 30 is provided in a laminated form on the other surface opposite to the pseudo-molded graphite sheet 10 stacked on one surface of the porous metal sheet 20 to be integrally attached and formed by pressure, coating, impregnation, etc. A part of the metal and organic-inorganic resin is impregnated to the opposite side of the graphite sheet 10 through the gap formed on the surface of the multi-porous metal sheet 20 to generate a binding force. The heat dissipation layer 30 is formed integrally attached to the surface of the multi-porous metal sheet 20, by coating an insulating resin composition of any one or more of PVC, PC, urethane, silicon, ABS, UV Either the formed insulating material or an adhesive formed by applying a resin having an adhesive component or an adhesive formed by attaching a double-sided tape, or a part thereof by pressure bonding with the porous metal sheet 20 while improving heat dissipation characteristics. Any one of the metal thin plates formed by attaching a thin plate made of soft aluminum or an aluminum alloy impregnated into the surface pores 20a of the multi-porous metal sheet 20 may be used or may be composed of a plurality of layers.

Hereinafter, various manufacturing methods of the electronic device high heat dissipation fusion sheet according to the present invention will be described, but are manufactured through a process very similar to the manufacturing method of the electromagnetic wave absorption extinction and shielding fusion sheet described above, the same reference numerals for the same process In addition, overlapping detailed description is abbreviate | omitted.

First Embodiment - Referring to FIG. 8, the method for manufacturing a high heat dissipation fusion sheet for an electronic device according to a first embodiment of the present invention includes a caustic graphite sheet preparation step (s10) and a sintered sheet 21. It consists of a porous metal sheet forming step (s20), a fusion sheet forming step (s30), a heat radiation thin film forming step (s40).

The caustic graphite sheet preparing step (s10) is a graphite-based graphite or graphite powder is compression-molded, or the graphite composition or graphite in which any one or more of organic, inorganic, ceramic-based to graphite, or organic-based, A graphite substrate composed of a mixture obtained by mixing a heat-dissipating resin of one or more of inorganic and ceramic series is prepared, and the crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3 is incomplete. Caustic in sheet form.

In the multi-porous metal sheet forming step (s20), first, a copper-based, tin-based, zinc-based, aluminum-based, stainless-based metal powder having a melting temperature of 300 ° C. to 1800 ° C. is prepared, but the particle size of the metal powder is The thing which has the magnitude | size of 1 micrometer-200 micrometers is prepared. Subsequently, the prepared metal powder is filled into a mold providing a molding space for forming a thin film material of a flat plate, and heated for 10 minutes to 300 minutes at a temperature 10% to 30% lower than the melting point for each melting characteristic of the material of the metal powder. And sinter molding to manufacture the sintered sheet 21. The sintered sheet 21 is stably fused to each other the boundary surfaces of the metal powder to form a void 20a having a uniform size of 0.001mm ~ 3.0mm.

In the forming of the fused sheet (s30), the graphite crystals constituting the graphite sheet are pressed by pressing the dummy graphite sheet 10 on one surface of the multi-porous metal sheet 20 so that the polycrystalline metal is Impregnated and bonded integrally while being impregnated into the surface voids of the sheet, the pressure is molded to have a range of density 1.6g / cm 3 ~ 6.0g / cm 3 while being molded to have a size of 0.001mm ~ 0.05mm of the voids. That is, by pressurizing the multi-porous metal sheet 20, which is the sintered sheet 21, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressurizing device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, it is pressed to a thickness of 0.01mm ~ 50mm to form a fusion sheet.

The heat radiation film layer forming step (s40) is a process of stacking the heat radiation film layer on the other surface of the multi-porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally.

Second Embodiment -Referring to FIG. 9, the method for manufacturing a high heat dissipation sheet for an electronic device according to a second embodiment of the present invention includes a caustic graphite sheet preparation step (s11) and an electroforming sheet 22. It is composed of a multi-porous metal sheet forming step (s21), a fusion sheet forming step (s31), a heat radiation thin film forming step (s41).

In the forming of the multi-porous metal sheet (s21), a completed multi-porous metal sheet is manufactured by molding a caustic multi-porous metal sheet of a metal electroforming method and then pressing it several times through a pressing process. That is, when the multi-porous metal sheet forming step in the present embodiment will be described in detail, first, a current-carrying layer is formed by applying a current-carrying fluid to the outer surface of a plate-shaped mold formed from a resin that is vaporized or liquefied at a high temperature, thereby forming an electric current layer. Dip the mold into the electrolytic tank. Then, when the mold is formed with the conductive layer immersed in the electroforming tank, the metal is electrodeposited to form the electrodeposition layer. Subsequently, when the mold for which the electrodeposition layer was formed was removed from the electroforming tank and heated to a predetermined temperature, the mold for molding was removed while the resin mold was melted, and as a result, a pseudo mold comprising an electrodeposition layer formed with voids having a size of 0.001 mm to 3.0 mm. The perforated metal sheet is completed. Thereafter, by pressing the caustic multi-porous metal sheet by using a pressurizing device such as a roller or a press about 1-10 times to form a thickness of 0.01 mm to 50 mm, the molding of the multi-porous metal sheet is completed.

The fusion sheet forming step (s31) is a graphite constituting the graphite sheet by pressing in a state in which the dummy graphite sheet 10 is laminated on one surface of the multi-porous metal sheet 20 manufactured by the electroforming method The crystals are integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet, and are molded to have a size of 0.001 mm to 0.05 mm while being press-molded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3. . That is, the pressure is applied to the multi-porous metal sheet 20, which is the electroformed cast sheet 22, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressurizing device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, the resultant is pressurized to have a thickness of 0.01 mm to 50 mm to form a fusion sheet.

The heat dissipation layer forming step (s41) is a process of stacking the heat dissipation layer on the other surface of the porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally.

Third Embodiment -Referring to FIG. 10, a method of manufacturing a high heat dissipation fusion sheet of an electronic device according to a third embodiment of the present invention includes a caustic graphite sheet preparing step (s12) and a metal thin sheet (23). The multi-porous metal sheet forming step (s22), the fusion sheet forming step (s32), the heat dissipation thin film forming step (s42).

In the multi-porous metal sheet forming step (s22), a metal sheet sheet 23 formed by forming a hole in a metal sheet is used, and the metal sheet sheet 23 is made of copper, tin, zinc, aluminum, stainless-based metal materials. It is a sheet member formed by forming a hole for forming a void having a size of 0.001mm to 3.0mm by using any one of a punching, laser, and etching method on a thin plate made of a thin plate.

In the forming of the fusion sheet (s32), the graphite sheet is pressed by pressing the temporary graphite sheet 10 on one surface of the porous metal sheet 20 provided as the metal sheet 23. The graphite crystals are integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet, and the size of the pores is 0.001 mm to 0.05 mm while being press-molded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3. It is molded to have. That is, the pressure is applied to the multi-porous metal sheet 20, which is the metal thin sheet 23, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressure device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, the resultant is pressurized to have a thickness of 0.01 mm to 50 mm to form a fusion sheet.

The heat dissipation layer forming step (s42) is a process of stacking the heat dissipation layer on the other surface of the multi-porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin plate made of aluminum or an aluminum alloy is used to attach to the opposite graphite sheet to generate a binding force integrally.

Fourth Embodiment -Referring to FIG. 11, a method of manufacturing a high heat dissipation fusion sheet of an electronic device according to a fourth embodiment of the present invention includes a caustic graphite sheet preparation step (s13) and a metal thin sheet (23). The multi-porous metal sheet forming step (s23), the fusion sheet forming step (s33), the heat radiation thin film forming step (s43).

The multi-porous metal sheet forming step (s23) is made by weaving the vertical wire 24a and the horizontal wire 24b made of a metal having a circular cross section to cross each other, between the vertical wire 24a and the horizontal wire 24b. A net sheet 24 in the form of a net or net in which voids are formed is used.

In the forming of the fused sheet (s33), the graphite sheet 10 is formed by pressing the dummy graphite sheet 10 on a surface of the multi-porous metal sheet 20 provided as the net sheet 24 in a state of being laminated. The graphite crystals are impregnated in the surface pores of the multi-porous metal sheet to be integrally attached to each other, and pressurized to have a density of 1.6 g / cm 3 to 6.0 g / cm 3 while having a size of 0.001 mm to 0.05 mm pore. Molded. That is, by pressurizing the porous sheet metal sheet 20, which is the net sheet 24, and the pseudo-molded graphite sheet 10 laminated on one surface thereof using a pressurizing device 1 to 20 times at a pressure of 30 MPa to 300 MPa. As a result, it is pressed to a thickness of 0.01mm ~ 50mm to form a fusion sheet.

The heat dissipation layer forming step (s42) is a process of stacking the heat dissipation layer on the other surface of the multi-porous metal sheet 20, that is, on the opposite side to which the caustic graphite sheet 10 is not attached. The heat dissipation layer 30 is integrally formed by pressing or applying or impregnating in the state of being laminated on the other surface of the multi-porous metal sheet 20, and part of the heat-radiating layer 30 is impregnated with a gap formed on the surface of the multi-porous metal sheet. An organic-inorganic resin or a thin sheet of aluminum or aluminum alloy is used, which is attached to the graphite sheet on the opposite side to create a binding force integrally.

As described above, the manufacturing method of the electronic device high heat dissipation fusion sheet using the multi-porous metal sheet 20 manufactured by various manufacturing processes can be economically produced through mass production due to the simple manufacturing process. In the process of forming the fused sheet by pressing together with the multi-porous metal sheet 20 in a state in which the crystal structure of the sheet 10 is unfinished, the graphite crystals constituting the pseudo-graphite sheet 10 are formed of the porous metal sheet 20. Impregnated with the voids 25 of the to maintain a solid binding force can be eliminated the end of the heat dissipation characteristics deteriorated due to the heat radiation interference phenomenon caused by the use of the resin or binder material having an adhesive component can be ensured excellent heat dissipation performance.

In particular, the heat dissipation film layer 30 formed on the other surface of the multi-porous metal sheet 20 opposite to the caustic graphite sheet 10 also has its components impregnated toward the caustic graphite sheet 10 through the pores 25. As a result, physically solid integration is achieved, thereby improving elasticity and durability, and as a result, sheet production of a large area is possible.

While the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive.

Claims

A moldable graphite sheet formed of a graphite substrate in the form of a sheet but having a density of 0.1 to 1.5 g / cm 3 in a crystal structure in an incomplete state; The pseudo-molded graphite sheet is laminated on one surface and is integrally attached and bonded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3 by pressure molding, thereby forming a plurality of 0.01 mm to 0.5 mm pores connected to the upper and lower surfaces. Electromagnetic wave absorption extinction and shielding fusion sheet, characterized in that the configuration comprising a.
The graphite sheet according to claim 1, wherein the graphite sheet is formed by compression-molding graphite or graphite powder, using a graphite composition in which one or more of organic, inorganic, and ceramic groups are formed in graphite, or organic series in graphite, Electromagnetic wave absorption extinction and shielding fusion sheet, characterized in that formed into any one of a mixture made by mixing any one or more of the inorganic series, ceramic series heat dissipation resin.
The method of claim 1, wherein the multi-porous metal sheet is a copper, tin, zinc, aluminum, stainless-based metal powder having a particle size of 1㎛ ~ 200㎛ by heating at a temperature of 10-30% lower than the melting temperature Electromagnetic wave absorption extinction and shielding fusion sheet, characterized in that the sintered sheet made by sintering and pressing it.
The molding die according to claim 1, wherein the multi-porous metal sheet is formed by immersing and energizing a molding die made of a resin that is vaporized or liquefied at a high temperature in an electroforming bath to electrodeposit metal to form an electrodeposition layer. Electromagnetic wave absorption extinction and shielding fusion sheet, characterized in that the heating sheet to remove the resin.
The sheet member according to claim 1, wherein the multi-porous metal sheet is a sheet member formed by forming a hole in a thin plate made of copper, tin, zinc, aluminum, or stainless-based metal by punching, laser, or etching. In order to prevent the crystal structure from being broken in the state in which the pseudo-molded graphite sheet is attached by press molding, the curved portion forming the surface and the curved surface with respect to the surface on which the pseudo-graphite graphite sheet is attached, and proceeding inward from the curved portion Electromagnetic wave absorption extinction and shielding fusion sheet, characterized in that the configuration comprising a slope surface portion is reduced gently.
[Claim 2] The fusion sheet of claim 1, wherein the multi-porous metal sheet is a net sheet woven so as to cross a vertical wire and a horizontal wire made of a metal having a circular cross section.
The method of claim 1, wherein the multi-porous metal sheet is integrally formed by pressing or applying or impregnating to the other surface to which the graphite sheet is not attached, the portion of the multi-porous metal sheet on the opposite side through the pores formed on the surface of the multi-porous metal sheet A heat dissipation layer is further provided with a metal and organic-inorganic resin impregnated and bound to the graphite sheet side, wherein the heat dissipation layer is any one of PVC, PC, urethane, silicon, ABS, UV on the surface of the multi-porous metal sheet Or an insulating material formed by coating one or more insulating resin compositions or an adhesive formed by applying a resin having an adhesive component, an adhesive formed by attaching a double-sided tape, or a thin metal plate formed by attaching a thin plate made of aluminum or an aluminum alloy. Electromagnetic wave absorption extinction and shielding melting, characterized in that one or more laminated Ply sheet.
A method for manufacturing an electromagnetic wave absorption extinction and shielding fusion sheet, the method comprising: preparing a pseudo-graphite graphite sheet having a graphite substrate having a shape of an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3; Copper, tin-based, zinc-based, aluminum-based, stainless-based metal powders having a melting temperature of 300 ° C. to 1800 ° C., wherein the metal powder has a particle size of 1 μm to 200 μm that is higher than the melting temperature. Forming a multi-porous metal sheet which is a porous porous sintered body having a pore of 0.05 mm to 3.0 mm by heating 10 minutes to 300 minutes under a condition of ˜30% low temperature; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and pressure-molded so that the graphite crystals constituting the graphite sheet are integrally attached and bonded to each other while being impregnated into the surface pores of the multi-porous metal sheet. Manufacture of a fusion sheet for electromagnetic wave absorption and shielding characterized in that it comprises a; fusion sheet forming step having a size of 0.01mm ~ 0.5mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 Way.
A method for manufacturing an electromagnetic wave absorption extinction and shielding fusion sheet, the method comprising: preparing a pseudo-graphite graphite sheet having a graphite substrate having a shape of an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3; Applying a conductive solution to the outer surface of the plate-shaped molding frame formed of a resin that is vaporized or liquefied at a high temperature to form a conductive layer, and immersed and energized it in an electroforming tank to electrodeposit metal to form an electrodeposition layer, and then heating the mold. Forming a pseudo-porous multi-porous metal sheet formed by removing resin; Forming the multi-porous metal sheet by pressing the caustic multi-porous metal sheet once to 10 times so as to have a thickness of 0.01 mm to 50 mm; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Method for producing an electromagnetic wave absorption and shielding fusion sheet characterized in that it comprises a; forming a fusion sheet having a size of 0.01mm ~ 0.5mm pore while pressure-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 .
A method for manufacturing an electromagnetic wave absorption extinction and shielding fusion sheet, the method comprising: preparing a pseudo-graphite graphite sheet having a graphite substrate having a shape of an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3; A sheet member in which a pore hole is formed by punching, laser, and etching methods on a thin plate made of copper, tin, zinc, aluminum, or stainless steel, wherein the pore hole is formed in a state in which a caustic graphite sheet is attached by pressing. In order to prevent the crystal structure from being broken, a curved portion forming a curved shape with the surface on the one surface to which the pseudo-molded graphite sheet is attached, and an inclined surface portion that gradually decreases in diameter while proceeding from the curved portion to the inside of the hole are formed. Forming a porous metal sheet; The pseudo-molded graphite sheet is laminated on one surface of the porous metal sheet and press-molded so that the graphite crystals constituting the graphite sheet are integrally attached and bonded to each other while being impregnated into the surface voids of the porous metal sheet, and having a density of 1.6. Method for producing a fusion sheet for electromagnetic wave absorption and shielding, characterized in that consisting of; forming a fusion sheet having a size of 0.01mm ~ 0.5mm pore while being press-molded to have a range of g / cm 3 ~ 6.0g / cm 3.
A method for manufacturing an electromagnetic wave absorption extinction and shielding fusion sheet, the method comprising: preparing a pseudo-graphite graphite sheet having a graphite substrate having a shape of an incomplete crystal structure having a density in the range of 0.1 g / cm 3 to 1.5 g / cm 3; Forming a multi-porous metal sheet having a net shape in which a void is formed between the vertical wire and the horizontal wire in such a way that the vertical wire and the horizontal wire made of a metal having a circular cross section cross each other; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and then press-molded so that the graphite crystals constituting the graphite sheet are integrally attached and bonded together while being impregnated into the surface pores of the multi-porous metal sheet. Manufacture of a fusion sheet for electromagnetic wave absorption and shielding characterized in that it comprises a; fusion sheet forming step having a size of 0.01mm ~ 0.5mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 Way.
The amorphous metal sheet forming step of any one of claims 8 to 11, wherein the amorphous metal sheet forming step is performed after the forming step of the multi-porous metal sheet by heating at 500 ° C. to 600 ° C. for 10 to 40 minutes to be amorphous; Method of manufacturing a fusion sheet for electromagnetic wave absorption and shielding further comprising the step of attaching the pseudo-molded graphite sheet to the metal sheet by compression molding.
The multi-porous metal sheet according to any one of claims 8 to 11, wherein the caustic graphite sheet is integrally attached to the other surface of the multi-porous metal sheet attached to one surface by pressing, applying, or impregnating. Forming a heat dissipation film layer made of an organic-inorganic resin that is impregnated with voids formed on the surface of the sheet and attached to the graphite sheet on the opposite side to integrally generate a binding force; Or aluminum is formed by attaching integrally to the other surface of the multi-porous metal sheet attached to one side by pressing, applying or impregnated to one side is impregnated into the air gap formed on the surface of the multi-porous metal sheet to create a binding force Or forming a heat dissipation layer formed of a thin plate made of aluminum alloy.
A moldable graphite sheet formed of a graphite substrate in the form of a sheet but having a density of 0.1 to 1.5 g / cm 3 in a crystal structure in an incomplete state; The pseudo-molded graphite sheet is laminated on one surface to be integrally attached and bonded to have a density of 1.6 g / cm 3 to 6.0 g / cm 3 by pressure molding, thereby forming a plurality of 0.001 mm to 0.05 mm pores connected to the upper and lower surfaces. Porous metal sheet; fusion sheet for high heat dissipation of the electronic device, characterized in that comprising a.
15. The method of claim 14, wherein the multi-porous metal sheet is integrally formed by pressing or applying or impregnating on the opposite surface to which the graphite sheet is attached, the part of the graphite on the opposite side through the pores formed on the surface of the multi-porous metal sheet The heat dissipation layer of the metal and organic-inorganic-based resin impregnated and bound to the sheet side; High heat dissipation sheet for electronic equipment characterized in that it comprises a configuration.
15. The graphite sheet according to claim 14, wherein the graphite sheet is formed by compression-molding graphite or graphite powder, or using a graphite composition in which one or more of organic, inorganic, and ceramic groups are formed on graphite, or organic series on graphite. One or more of the mixtures formed by mixing heat-dissipating resins of any one or more of inorganic and ceramic series are formed. The multi-porous metal sheet is made of copper, tin, zinc, aluminum, or stainless-based metal powder of 1 μm. A sintered sheet for high heat dissipation of electronic equipment, characterized in that a sintered sheet is formed by heating and sintering at a temperature of 10 to 30% lower than a melting temperature with a particle size of ˜200 μm.
15. The mold according to claim 14, wherein the multi-porous metal sheet is formed by immersing and energizing a molding die formed of a resin that is vaporized or liquefied at a high temperature in an electroforming bath to electrodeposit metal to form an electrodeposition layer. High heat dissipation sheet for electronic devices, characterized in that the sheet is a metal electrolytic sheet made by removing the resin by heating.
15. The method of claim 14, wherein the multi-porous metal sheet is a sheet member formed by forming a hole in the thin plate made of copper, tin, zinc, aluminum, stainless-based metal material by punching, laser, etching method, the pore hole is In order to prevent the crystal structure from being broken in the state in which the pseudo-molded graphite sheet is attached by press molding, the curved portion forming the surface and the curved surface with respect to the surface on which the pseudo-graphite graphite sheet is attached, and proceeding inward from the curved portion High heat dissipation fusion sheet, characterized in that comprising an inclined surface portion is gently reduced in diameter.
15. The method of claim 14, wherein the multi-porous metal sheet is a fused sheet for high heat dissipation of the electronic device, characterized in that the net sheet woven to cross the vertical wire and the horizontal wire made of a metal having a circular cross section.
The method of claim 15, wherein the heat dissipating layer has an insulating material or an adhesive component formed by coating an insulating resin composition of any one or more of PVC, PC, urethane, silicone, ABS, UV on the surface of the porous metal sheet High temperature fusion for electronic devices, characterized in that any one or one or more of a metal thin film formed by attaching a resin-coated adhesive or a double-sided tape or a thin metal plate made of aluminum or aluminum alloy is laminated. Sheet.
Claims [1] A method for manufacturing a heat dissipation sheet for an electronic device, the method comprising: preparing a pseudo-graphite sheet having a graphite substrate having a sheet structure having an incomplete crystal structure having a density of 0.1 g / cm 3 to 1.5 g / cm 3; Copper, tin-based, zinc-based, aluminum-based, stainless-based metal powders having a melting temperature of 300 ° C. to 1800 ° C., wherein the metal powder has a particle size of 1 μm to 200 μm that is higher than the melting temperature. Forming a multi-porous metal sheet, which is a porous porous sintered body having a pore of 0.001 mm to 3.0 mm by heating 10 minutes to 300 minutes under a condition of ˜30% low temperature; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Method for producing a high-fusion fusion sheet of electronic equipment, characterized in that it comprises a; forming a fusion sheet having a size of 0.001mm ~ 0.05mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 .
Claims [1] A method for manufacturing a heat dissipation sheet for an electronic device, the method comprising: preparing a pseudo-graphite sheet having a graphite substrate having a sheet structure having an incomplete crystal structure having a density of 0.1 g / cm 3 to 1.5 g / cm 3; Applying a conductive solution to the outer surface of the plate-shaped molding frame formed of a resin that is vaporized or liquefied at a high temperature to form a conductive layer, and immersed and energized it in an electroforming tank to electrodeposit metal to form an electrodeposition layer, and then heating the mold. Forming a pseudo-porous multi-porous metal sheet formed by removing resin; Forming the multi-porous metal sheet by pressing the caustic multi-porous metal sheet once to 10 times so as to have a thickness of 0.01 mm to 50 mm; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Method for producing a high-fusion fusion sheet of electronic equipment, characterized in that it comprises a; forming a fusion sheet having a size of 0.001mm ~ 0.05mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 .
Claims [1] A method for manufacturing a heat dissipation sheet for an electronic device, the method comprising: preparing a pseudo-graphite sheet having a graphite substrate having a sheet structure having an incomplete crystal structure having a density of 0.1 g / cm 3 to 1.5 g / cm 3; A sheet member in which a pore hole is formed by punching, laser, or etching in a thin plate made of copper, tin, zinc, aluminum, or stainless steel, wherein the pore hole is attached to the pseudo-graphite sheet by pressing. In order to prevent the crystal structure from being broken, a curved portion forming a curved shape with the surface is formed on the one surface to which the caustic graphite sheet is attached, and an inclined surface portion that gradually decreases in diameter while proceeding from the curved portion to the inside of the hole. Forming a porous metal sheet; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and press-molded to allow the graphite crystals constituting the graphite sheet to be integrally attached and bonded while being impregnated into the surface pores of the multi-porous metal sheet. Method for producing a high-fusion fusion sheet of electronic equipment, characterized in that it comprises a; forming a fusion sheet having a size of 0.001mm ~ 0.05mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 .
Claims [1] A method for manufacturing a heat dissipation sheet for an electronic device, the method comprising: preparing a pseudo-graphite sheet having a graphite substrate having a sheet structure having an incomplete crystal structure having a density of 0.1 g / cm 3 to 1.5 g / cm 3; Forming a multi-porous metal sheet having a net shape in which a void is formed between the vertical wire and the horizontal wire by crossing the vertical wire and the horizontal wire made of a metal having a circular cross section; The pseudo-molded graphite sheet is laminated on one surface of the multi-porous metal sheet and then press-molded so that the graphite crystals constituting the graphite sheet are integrally attached and bonded together while being impregnated into the surface pores of the multi-porous metal sheet. Method for producing a high-fusion fusion sheet of electronic equipment, characterized in that it comprises a; forming a fusion sheet having a size of 0.001mm ~ 0.05mm void while press-molded to have a range of 1.6g / cm 3 ~ 6.0g / cm 3 .
25. The amorphous metal sheet forming method according to any one of claims 21 to 24, wherein the amorphous metal sheet forming step is performed after the forming step of the multi-porous metal sheet by heating at 500 ° C to 600 ° C for 10 to 40 minutes to be amorphous. Method of manufacturing a high heat-dissipating fusion sheet of the electronic device characterized in that it further comprises the step of attaching the molded graphite sheet to the sheet by compression molding.
25. The porous metal sheet according to any one of claims 21 to 24, wherein the caustic graphite sheet is integrally attached to the other surface of the multi-porous metal sheet attached to one surface by pressing, coating, or impregnation. Forming a heat dissipation film layer made of an organic-inorganic resin that is impregnated with voids formed on the surface of the sheet and attached to the graphite sheet on the opposite side to integrally generate a binding force; Or aluminum is formed by attaching integrally to the other surface of the multi-porous metal sheet attached to one side by pressing, applying or impregnated to one side is impregnated into the air gap formed on the surface of the multi-porous metal sheet to create a binding force Or forming a heat dissipation layer formed of a thin plate made of an aluminum alloy. 2.