KR100958891B1 - Thin film type gasket usign for a display, having excellent conductivity and elastic property and method of producing the same - Google Patents

Abstract

PURPOSE: A display thin film gasket and a manufacturing method thereof are provided to improve the elasticity and the conductivity by forming a conductive elastic layer in one side of a multi-layered thin film. CONSTITUTION: A multi-layered thin film comprises a conductive fabric layer(110) and an ATU(Anti-Tarnish Urethane) coating layer(120). The conductive fabric layer has the thickness of 0.25mm or 0.03mm. The ATU coating layer is formed in one side of the conductive layer. A conductive elastic layer(130) is formed in the upper side, lower side or both sides of the multi-layered thin film. The conductive elastic layer comprises the silicon fluid, the conductivity powder, and the silicon oil. The conductive elastic layer has the thickness of 20um or 80um.

Description

Heat-resistant thin film gasket for display with excellent conductivity and elasticity and manufacturing method thereof {THIN FILM TYPE GASKET USIGN FOR A DISPLAY, HAVING EXCELLENT CONDUCTIVITY AND ELASTIC PROPERTY AND METHOD OF PRODUCING THE SAME}

The present invention relates to a heat-resistant thin film gasket for display having excellent conductivity and elasticity, and a method of manufacturing the same. More particularly, the present invention relates to excellent cushioning properties even in the form of a thin film. The present invention relates to a heat-resistant thin film gasket for a display having excellent heat resistance and a method of manufacturing the same.

 Conventional plated sponge cushion material has a problem that the shielding efficiency is lowered due to the peeling of the plated metal powder during the cutting process, and the electrical pattern of the conductive pattern or electronic components formed on the printed circuit board (PCB) inside the device, There is a big problem in adhesion with the adherend because of the property of the sponge having porosity.

In addition, in the past, a sponge cushion material for electromagnetic wave shielding was prepared by simply impregnating a porous sponge with an electrically conductive polymer resin solution and then squeezing and drying. In this case, not only the pores on the surface of the cushioning material can be covered but also the cushioning material itself becomes hard. There is a disadvantage in that elasticity (cushionability) is reduced.

In addition, a high-density foam sponge is drilled in a predetermined shape for up and down conduction, and then a conductive material (for example, conductive carbon black, graphite, gold, silver, copper, nickel or aluminum fine powder) is applied to the perforated holes and the surface. In the case of filling and coating, there are problems in that the process increases and the product cost increases. In addition, the elastic recovery power of the cushioning material is lowered by the metal coating agent filled in the perforated hole, and the metal is removed from the sheet when the sheet is moved or distorted due to the physical property difference between the hardened metal and the sheet due to penetration or impregnation. There is a problem.

As described above, the heat-resistant thin film gasket for display having excellent conductivity and elasticity has various problems and thus requires continuous research.

The present invention can be used for electromagnetic shielding, it is excellent in cushioning properties in the form of a thin film, excellent in both vertical (up and down) or horizontal direction, heat resistance thin film gasket for excellent conductivity and elasticity, particularly having excellent heat resistance It is to provide.

According to a first embodiment of the present invention, a multilayer thin film including a conductive fabric layer and an ATU coating layer formed on at least one surface of the conductive fabric layer; And a heat-resistant thin film gasket having excellent conductivity and elasticity, which is formed on top, bottom, or top and bottom of the multilayer thin film, and includes a conductive elastic layer including liquid silicon, conductive powder, and silicone oil.

According to a second embodiment of the present invention, a multilayer thin film is formed on at least one surface of a conductive fabric layer and the conductive fabric layer, and includes a conductive elastic layer including liquid silicon, conductive powder, and silicone oil; And it provides a heat-resistant thin film gasket for excellent conductivity and elasticity comprising an ATU coating layer formed on the top, bottom, or top and bottom of the multilayer thin film.

The heat-resistant thin film gasket for display having excellent conductivity and elasticity according to the present invention has excellent cushioning properties even in the form of a thin film, has excellent conductivity in the vertical (vertical) or horizontal direction, has particularly excellent heat resistance, and has an electromagnetic shielding ratio of more than ordinary levels. Indicates.

Hereinafter, a heat-resistant thin film gasket for excellent display and elasticity according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, in adding reference numerals to the elements of each drawing, it should be noted that the same reference numerals are used to refer to the same elements even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

1 to 5 are perspective views of a heat resistant thin film gasket for a display according to a first embodiment of the present invention.

1 to 5, the heat-resistant thin film gasket for display includes a multilayer thin film including a conductive fabric layer 110 and an ATU coating layer 120 formed on at least one surface of the conductive fabric layer; And a conductive elastic layer 130 formed on the upper, lower, or upper and lower portions of the multilayer thin film, and including liquid silicone, conductive powder, and silicone oil.

The display heat-resistant thin film gasket is excellent in cushioning properties, especially heat resistance, even in the form of a thin film compared to a gasket using a conventional fabric or a urethane.

The conductive fabric layer 110 may be manufactured by processing a conductive metal on the fabric, such as plating, coating, and impregnation. Preferred examples of the conductive metal may include nickel, copper, gold, silver, tin, cobalt, and combinations thereof, but are not limited thereto.

The fabric may be a fiber fabric or mesh (usually means the fabric of the net structure). At this time, the fiber fabric can be used both woven and non-woven fabric, and most preferably, it is preferable to use a DTY fabric manufactured using draw textured yarn (DTY).

The conductive fabric layer preferably has a thickness of 0.03 to 0.25 mm. When the thickness of the conductive fabric layer is within the above range, the resistance is low and excellent in electrical conductivity, and may be thin enough to be applied to a heat-resistant thin film gasket for display having excellent conductivity and elasticity, but may exhibit excellent durability.

The ATU coating layer 120 is formed on at least one surface of the conductive fabric layer, and prevents contamination due to foreign substances such as fingerprints, and prevents burrs from occurring in the fabric of the conductive layer. In addition, the ATU coating layer 120 may prevent the composition for forming the conductive elastic layer 130 penetrate into the conductive fabric layer 110. In addition, the adhesion between the conductive elastic layer 130 and the conductive fabric layer 110 may be further improved.

The ATU coating layer 120 is generally manufactured using a composition for forming an ATU coating layer including a urethane resin, which is well known in the art, so detailed description thereof will be omitted.

In addition, the ATU coating layer may be formed on both the top and bottom of the conductive fabric layer.

The conductive elastic layer 130 is formed on the upper, lower, or upper and lower portions of the multi-layered thin film including the conductive fabric layer 110 and the ATU coating layer 120, the cushioning material having elasticity to absorb shock from the outside It can function, and it has electrical conductivity by including electroconductive powder.

The conductive elastic layer 130 is formed by coating a composition for forming a conductive elastic layer including liquid silicon, conductive powder, and silicon oil on top, bottom, or top and bottom of the multilayer thin film and curing the coating.

The conductive powder is a silver coated copper powder of dendritic type and a silver coated copper powder of granular type (Granular type) in a weight ratio of 2: 1 to 3: 1 Copper powder; Alternatively, 10 to 50 parts by weight of nickel powder may be added to the total amount of the two silver coated copper powders. When the two kinds of silver coated copper powder is used as the conductive powder, there is an economical effect than silver powder, and there is an advantage that it can exhibit shielding characteristics as silver powder. Rather, it is economical to reduce the amount of expensive silver-coated copper powder and achieve the same level of effect, and is particularly preferable because the conductivity can be further improved.

As the liquid silicone, two or more liquid silicone resins may be used. Preferably, the liquid silicone is an addition type two-component liquid silicone resin that is cured through crosslinking of a vinyl group-containing polysiloxane and a polysiloxane having a Si—H bond. 1.05-1.10 and hardness of 30-50 Shore A can be used.

More preferably, the addition type two-component liquid silicone resin is crosslinked and cured in accordance with the addition reaction of siloxane containing Si—H in the presence of a platinum catalyst. Examples of the platinum catalyst include a fine platinum powder, a thermoplastic black containing a platinum black or a platinum component, and the like. On the other hand, the additive two-component liquid silicone resin may include aerosol silica, quartz powder, precipitated silica, diatomaceous earth powder and the like, and may further include additives such as a curing rate regulator, adhesion promoter and the like.

 The liquid silicone functions as a binder and imparts heat resistance and moisture resistance to the conductive elastic layer including the same.

The liquid silicone may be used in an amount of 30 to 65 parts by weight based on 100 parts by weight, and preferably 45 to 65 parts by weight. If the liquid silicone is added below 30 as the content, it is difficult to manufacture the solution itself, and when added to 65 or more, a phenomenon occurs in which conductivity is not expressed.

remind As the silicone oil, one having a molecular structure in which silicon, to which an organic group is bonded, is connected by a siloxane bond (Si—O—Si) may be used. Preferably, C ₆ -C ₂₀ It is possible to use an organic group (orgacic group) selected from the group consisting of chloroalkyl groups such as alkyl groups, chloropropyl groups or trichloropropyl groups, arylalkyl groups such as phenylethyl groups, epoxy groups and cyano groups, and volatile ones. It is preferable that the said silicone oil has a viscosity of 3.7-4.5 centipoise (cP).

In addition, the silicone oil may be used by mixing two or more kinds, preferably a volatile oil and a non-volatile oil can be used as appropriately mixed, in this case, to improve the dispersibility of the solution and excellent residual oil after sheet making It is preferable because it has advantages in appearance and tensile strength improvement.

The silicone oil is preferably used in 5 to 20 parts by weight based on 100 parts by weight of the total. This is because when silicone oil is used below 5, the dispersibility of the liquid is lowered and the sheet is difficult to produce, whereas when it is used above 20, oil may appear after the sheet is produced or the tensile force may be decreased.

The silicone oil functions as a solvent and improves the dispersibility of the conductive powder when used in combination with the liquid silicone, thereby improving the conductivity of the conductive elastic layer including the same, and making the surface smoother.

The conductive elastic layer is prepared from a composition of a liquid silicone and a silicone oil, thereby having excellent heat resistance and moisture resistance by the liquid silicone, and improving the dispersibility of the liquid by the silicone oil to have improved conductivity, tensile strength, and beautiful appearance. In addition, even a thin film can exhibit high cushioning properties, and in particular, an effect of increasing dispersibility can be obtained.

Preferably, the conductive elastic layer has a thickness of 20 to 80 μm, and when the thickness of the conductive elastic layer is within the above range, the conductive elastic layer may be a thin film that can be used as a display gasket and absorbs shock from the outside. This is because sufficient cushioning properties can be exhibited.

The heat-resistant thin film gasket for a display including the conductive fabric layer, the ATU coating layer, and the conductive elastic layer has an acrylic pressure sensitive adhesive, a vinyl acetate pressure sensitive adhesive, a polyvinyl alcohol pressure sensitive adhesive, a polyvinyl pressure sensitive adhesive, a polyvinyl acetate pressure sensitive adhesive, It may further include a conductive adhesive layer containing a component selected from the group consisting of a polyamide-based adhesive, a polyethylene-based adhesive, and combinations thereof.

6 and 7 are perspective views of a heat resistant thin film gasket for display according to a second embodiment of the present invention.

6 and 7, the heat-resistant thin film gasket for display is formed on at least one surface of the conductive fabric layer 110 and the conductive fabric layer and includes a conductive elastic layer 130 including liquid silicone, conductive powder, and silicone oil. A multi-layered thin film comprising: And an ATU coating layer 120 formed on the top, bottom, or top and bottom of the multilayer thin film.

Next, a method of manufacturing the heat-resistant thin film gasket 100 for a display according to a third embodiment of the present invention will be described.

8 is a flowchart illustrating a method of manufacturing a heat-resistant thin film gasket for display according to a third embodiment of the present invention, which will be described below with reference to FIG. 8.

Referring to Figure 8, the manufacturing method of the heat-resistant thin film gasket for display, the step of forming a conductive fabric layer by including a conductive metal in the fabric using any one of the treatment method of plating, coating and impregnation (S1), Forming an ATU coating layer on at least one surface of the conductive fabric layer to form a multilayer thin film having an ATU coating layer (S2), including liquid silicon, conductive powder, and silicone oil on the upper, lower, or upper and lower portions of the multilayer thin film; Forming a conductive elastic layer (S3).

First, the fabric layer 110 is formed by including a conductive metal in a fiber or mesh fabric through any one of plating, coating, and impregnation (S1).

Preferably, when the conductive metal is plated on the fiber or mesh fabric, it is preferable to precede the chemical interface treatment process. In the chemical interfacial process, the surface roughness is formed on the fabric by the etching process and the palladium ions are adsorbed.

 9 is a process chart showing an example of a chemical surface treatment process of a heat-resistant thin film gasket for display. Referring to FIG. 9, specifically, the chemical interface treatment process includes caustic soda etching / ultrasonic cleaning (hydrophilicity), water washing, acid treatment (neutralization), water washing, palladium catalysis (palladium ion adsorption), water washing, sulfuric acid activation. , Water washing may be performed. First, the fiber or mesh fabric is passed through an etching bath at a concentration of 10 to 15% by weight of 80 ℃ caustic soda and then washed with water (S10). Then, neutralized and washed with an aqueous solution of 50 to 70 ℃ hydrochloric acid 15 to 25% by weight concentration (S20). Thereafter, a palladium catalyst bath composed of a mixture of palladium chloride and tin chloride is passed through to adsorb and wash the palladium ions on the fabric (S30). Thereafter, in order to remove tin ions adsorbed together with palladium ions, it is deposited in 15 to 20% by weight sulfuric acid activator and washed with water to form only palladium ions in the fabric (S40).

As described above, when the conductive metal is chemically grown on the palladium catalyst formed on the fabric, the plating process may be more stably obtained. In addition, it is advantageous to reduce costs by adding post-treatment by impregnation with water-soluble polyurethane to prevent contamination by foreign matters and to improve corrosion resistance after conductive metal plating, and may not adversely affect greatly improved electrical conductivity.

After the chemical interface treatment process, the plating process of the conductive metal is performed. Plating of the conductive metal is preferably carried out by any one of electrolytic, electroless, substitutional, vacuum deposition, sputtering, more preferably electrolessly. For example, nickel metal sulfate is deposited in an electroless nickel plating bath mixed with 25 to 35 g / l of sodium hypophosphite and 35 to 45 g / l of sodium citrate to precipitate nickel metal to precipitate the surface of the fabric and the hole. The nickel plating layer was first formed on the plate and washed with water, and then copper was deposited in an electroless copper plating bath containing 3.5 to 4.5 g / l copper sulfate, 8 to 12 g / l caustic soda and 5.5 to 6.0 g / l formalin for copper plating. A metal is precipitated and a copper plating layer is formed secondary, and it washes with water. Since copper is rapidly oxidized, the nickel plating layer is deposited by electroless nickel plating bath containing 25 to 35 g / l nickel sulfate, 15 to 25 g / l sodium hypophosphite and 35 to 45 g / l sodium citrate to prevent oxidation. There is a method of forming and washing with a car, but is not limited thereto.

Hereinafter, it will be described with reference to FIG. 8 again.

After the step S1, the ATU coating layer 120 is formed on at least one surface of the conductive fabric layer 110, thereby forming a multi-layer thin film on which the ATU coating layer 120 is formed (S2).

In this case, the ATU coating layer 120 may be formed on both sides of the conductive fabric layer.

Thereafter, the conductive powder, the liquid silicone, and the silicone oil are mixed and dispersed at an appropriate ratio to prepare a composition for forming a conductive elastic layer, and the conductive elastic layer 130 is applied by applying it to the upper, lower, or upper and lower portions of the multilayer thin film. To form a heat-resistant thin film gasket for display having excellent conductivity and elasticity.

Subsequently, an acrylic adhesive, a vinyl acetate-based adhesive, a polyvinyl alcohol-based adhesive, a polyvinyl-based adhesive, a polyvinylacetate-based adhesive, a polyamide-based adhesive, and a polyethylene-based adhesive film on the upper or lower portion of the heat-resistant thin film gasket having excellent conductivity and elasticity. A conductive adhesive layer containing a component selected from the group consisting of an adhesive and a combination thereof can be further formed.

In addition, the manufacturing method of the heat-resistant thin film gasket 100 for a display according to a fourth embodiment of the present invention will be described. FIG. 10 is a flowchart illustrating a method of manufacturing a heat-resistant thin film gasket for a display according to a fourth embodiment of the present invention, which will be described below with reference to FIG. 10.

Referring to FIG. 10, the method of manufacturing a heat-resistant thin film gasket for display includes forming a conductive fabric layer by including a conductive metal in the fabric using any one of plating, coating, and impregnation processing methods (S11). Forming a conductive elastic layer including liquid silicon, conductive powder, and silicone oil on at least one surface of the conductive fabric layer (S12), and forming an ATU coating layer on the upper, lower, or upper and lower portions of the multilayer thin film. Step S13 is included.

FIG. 11 is a flowchart illustrating a method of manufacturing a heat resistant thin film gasket for display according to a fifth embodiment of the present invention. Hereinafter, a method of manufacturing a thin film cushion adhesive tape will be described with reference to FIG. 11.

In the manufacturing method of the thin-film cushion adhesive according to the fifth embodiment of the present invention, the conductive fabric layer is formed by including the conductive metal in the fabric using any one of the treatment methods of plating, coating, and impregnation (S110). Forming a multi-layered thin film by forming an ATU coating layer on at least one surface of the conductive fabric layer (S120), a composition for forming a conductive elastic layer comprising a conductive elastic layer comprising a liquid silicone, a conductive powder, and a silicone oil on a release film After coating and drying, thermal lamination with the multilayer thin film, to form a conductive fabric layer having an ATU coating layer and a conductive elastic layer (S130). It does not form a conductive elastic layer by directly applying a composition for forming a conductive elastic layer on the conductive fabric layer on which the ATU coating layer is formed, and after coating and drying the composition for forming a conductive elastic layer on a release film, the multilayer thin film and heat Since it is a method of laminating, the phenomenon which the composition for elastic layer formation seeps into the back surface of an electroconductive fabric layer can be prevented.

Hereinafter, the present invention will be described in more detail with reference to experimental examples of the present invention, but the following experimental examples are for the purpose of explanation of the present invention and the scope of the present invention should not be construed as limited by the following experimental examples.

Experimental Example

The DTY fabric having a thickness of 130 μm was passed through a caustic soda solution etching bath at 80 ° C. and 12 wt% concentration, washed with water, and then neutralized and washed with 60 wt% and 20 wt% aqueous hydrochloric acid solution. Subsequently, the fabric was passed through a palladium catalyst bath prepared by mixing palladium chloride and tin chloride at a concentration of 0.8% by weight, and the palladium ions were adsorbed onto the fabric, washed with water, and then immersed in an 18 wt% sulfuric acid activating tank and washed with water. Only palladium ions were formed.

Subsequently, the fabric was immersed in an electroless nickel plating bath containing 30 g / l nickel sulfate, 20 g / l sodium phosphate, and 40 g / l sodium citrate to precipitate nickel metal to form a nickel plated layer on the fabric and pores and washed with water. . Thereafter, a copper metal was deposited by depositing an electroless copper plating bath containing 4.0 g / l of copper sulfate, 10 g / l of caustic soda, and 6.0 g / l of formalin, thereby depositing a copper metal layer. Thereafter, a nickel plating layer was formed by depositing 25 g / l nickel sulfate, 20 g / l sodium phosphate, and 40 g / l sodium citrate in an electroless nickel plating bath to prepare a conductive fabric layer.

Subsequently, the polyurethane resin was diluted in an organic solvent containing isopropanol and ethanol (volume ratio of 50:50) at a concentration of 40% by weight to prepare a composition for forming an ATU coating layer. After coating to a thickness and dried to form an ATU coating layer.

Thereafter, the dendritic type silver coated copper powder and the granular type silver coated copper powder were mixed with a conductive powder, two-liquid liquid silicone, and cyclic methyl silicone in a weight ratio of 2: 1. A composition for forming a conductive elastic layer was prepared by mixing a volatile silicone oil having excellent spreadability and lubricity and a non-volatile silicone oil having high compatibility and stability as an intermediate raw material for producing silicon at a weight ratio of 45:35:20. The coating layer was coated with a thickness of 50 μm to form a conductive elastic layer.

Thereafter, a conductive acrylic adhesive was transferred to the opposite side of the conductive elastic layer on which the ATU coating layer was formed, thereby manufacturing a heat resistant thin film gasket having excellent conductivity and elasticity.

For the heat-resistant thin film gasket for display manufactured as described above, the electromagnetic shielding rate was measured according to the measuring method of ASTM D4935-99. As a result, the heat resistant thin film gasket for display having excellent conductivity and elasticity of Example 1 exhibited electromagnetic shielding performance of 70 dB or more.

In addition, high temperature and high humidity test at 85 ° C, 85% RH, and 100hr resulted in resistance change that increased only about 10% after the test, and 20% compression, 85 ° C / 85%, and 200Hr cushioning test results. min95% results were obtained.

Therefore, the heat-resistant thin film gasket for display according to the present invention has excellent cushioning properties, vertical and horizontal energization as well as excellent electromagnetic shielding performance, in particular excellent heat resistance.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

1 to 5 are perspective views of a heat resistant thin film gasket for a display according to a first embodiment of the present invention.

6 and 7 are perspective views of a heat resistant thin film gasket for display according to a second embodiment of the present invention.

8 is a flowchart illustrating a method of manufacturing a heat-resistant thin film gasket for a display according to a third embodiment of the present invention.

9 is a process chart showing an example of a chemical surface treatment process of a heat-resistant thin film gasket for display.

10 is a flowchart illustrating a method of manufacturing a heat-resistant thin film gasket for a display according to a fourth embodiment of the present invention.

11 is a flowchart illustrating a method of manufacturing a heat-resistant thin film gasket for a display according to a fifth embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: heat resistant thin film gasket for display

110: fabric layer

120: ATU coating layer

130: conductive elastic layer

Claims (8)

A multilayer thin film including a conductive fabric layer and an anti-tarnish urethane (ATU) coating layer formed on at least one surface of the conductive fabric layer; And And a conductive elastic layer formed on top, bottom, or top and bottom of the multilayer thin film, the conductive elastic layer including liquid silicon, conductive powder, and silicone oil. A multilayer thin film formed on at least one surface of the conductive fabric layer and the conductive fabric layer and including a conductive elastic layer including liquid silicon, conductive powder, and silicone oil; And The heat-resistant thin film gasket for display, comprising a; anti-tarnish urethane resin (Anti-tarnish urethane, ATU) coating layer formed on the top, bottom, or top and bottom of the multilayer thin film. The method according to claim 1 or 2, The conductive powder is two kinds of silver coated copper powder consisting of dendritic type silver coated copper powder and granular type silver coated copper powder or two kinds of silver coated copper powder and Heat-resistant thin film gasket for display, characterized in that the mixture of nickel powder. The method according to claim 1 or 2,  The liquid silicone is an additive two-component liquid silicone resin cured through crosslinking of a vinyl group-containing polysiloxane and a polysiloxane having an Si—H bond, and has a specific gravity of 1.05 to 1.10 and a hardness of 35 to 45 Shore A. Heat Resistant Thin Film Gaskets. The method according to claim 1 or 2, The silicone oil is C ₆ -C ₂₀ Silicon having an organic group selected from the group consisting of an alkyl group, a chloropropyl group, a trichloropropyl group, a phenylethyl group, an epoxy group and a cyano group is a polymer resin connected by a siloxane bond (Si-O-Si). Heat-resistant thin film gasket for display. The method according to claim 1 or 2, The conductive elastic layer is a heat-resistant thin film gasket for display, characterized in that it comprises 30 to 65 parts by weight of liquid silicone and 5 to 20 parts by weight of silicone oil with respect to 100 parts by weight of the conductive powder. The method according to claim 1 or 2, The conductive elastic layer is a heat-resistant thin film gasket for display, characterized in that having a thickness of 20 to 80㎛. The method according to claim 1 or 2, The heat-resistant thin film gasket for the display is an acrylic adhesive, a vinyl acetate-based adhesive, a polyvinyl alcohol-based adhesive, a polyvinyl-based adhesive, a polyvinylacetate-based adhesive, a polyamide-based adhesive, a polyethylene-based adhesive, and a combination thereof at the top or the bottom thereof. The heat-resistant thin film gasket for display, further comprising; a conductive adhesive layer formed of a component selected from the group consisting of.

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