KR20070088230A - Conductivity sheet and fabricating method thereof - Google Patents

Abstract

A conductivity sheet and a method for manufacturing the same are provided to prevent a short circuit which is not wanted from being generated by preventing the metal thread of a conductive net forming a conductive layer from disentangling. A conductivity sheet includes a supporting layer(31), a first conductivity adhesion layer(37), a conductive net, and a second conductivity adhesion layer(47). The supporting layer is electrically formed with a release paper as a non-conducting substance. The first conductivity adhesion layer(37) is formed with a first conductive powder(33) and a first adhesive(35). The conductive net is used as a conductive layer and is attached to the first conductivity adhesion layer(37) by forming a metal thread in a shape of a net having conductivity. The second conductivity adhesion layer(47) is formed on the conductive net having the same structure as the first conductivity adhesion layer(37) by being formed with a second adhesive(45) and a second conductive powder(43).

Description

Conductive sheet and manufacturing method thereof

1 is a cross-sectional view of a conductive sheet according to an embodiment of the prior art.

2 is a cross-sectional view of a conductive sheet according to another embodiment of the prior art.

3 is a cross-sectional view of the conductive sheet according to the first embodiment of the present invention.

4 is a plan view of the conductive network shown in FIG.

5 is a cross-sectional view of a conductive sheet according to a second embodiment of the present invention.

6 is a plan view of the conductive network shown in FIG.

7 is a plan view of a conductive network of a conductive sheet according to a third embodiment of the present invention.

8 is a plan view of a conductive network of a conductive sheet according to a fourth embodiment of the present invention.

9A to 9C are process drawings for manufacturing the conductive sheet according to the first embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

31: support layer 33: first conductive powder

35: first adhesive 37: first conductive adhesive layer

39: conductive network 41: metal yarn

42: synthetic fiber yarn 43: second conductive powder

45: second adhesive 47: second conductive adhesive layer

49: carrier layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive sheet and a method of manufacturing the same, and more particularly, to a conductive sheet and a method of manufacturing the same, in which the conductive layers on both surfaces of the support layer as well as the horizontal direction may be electrically connected and vertically energized along the cross-sectional direction.

The conductive sheet has a conductive layer formed by plating or vapor deposition on one or both surfaces of a support layer made of synthetic resin, synthetic fiber, or the like, or a metal foil is attached to have conductive properties.

In the above, the conductive sheet not only shields the electromagnetic waves generated from the electronic products, but also uses a large-scale shielding such as an automated factory control room, a hospital operating room and an intensive care unit, and the building itself. It is used to make space.

In addition, the conductive sheet may be used to electrically connect a circuit of the printed circuit board and the electronic component when the electronic component is mounted on a printed circuit board (PCB) or the like without soldering adjacent printed circuit boards. .

In order to electrically connect the adjacent printed circuit boards without soldering, a conductive sheet coated with a conductive layer and a conductive adhesive may be used on one surface.

However, in order to electrically connect and mount electronic components on a printed circuit board, both surfaces are vertically energized along the cross-sectional direction, that is, conductive layers formed on both surfaces of the support layer are energized with each other or metal foil. A conductive sheet coated with a conductive adhesive or a conductive adhesive should be used on both surfaces of the sheet. Thereby, the electronic component may be mounted on the printed circuit board without being soldered by the conductive sheet which is applied with the conductive adhesive or the conductive adhesive on both surfaces where the conductive layer is formed and is vertically energized along the cross-sectional direction. .

1 is a cross-sectional view of a conductive sheet according to an embodiment of the prior art.

In the conductive sheet according to the exemplary embodiment of the related art, an adhesion layer 13 is formed on both surfaces of the conductive layer 11 made of a metal foil. The conductive layer 11 is formed of a metal foil such as aluminum, copper, nickel, zinc, tin, gold or silver having conductive properties, and the adhesion layer 13 is formed by applying a conductive adhesive or a conductive adhesive. The conductive layer 11 is well adhered to other materials. In addition, the adhesion layer 13 may be formed only on one surface as well as on both surfaces of the conductive layer 11.

The conductive sheet having the above-described configuration has good conductive properties because the conductive layer 11 is formed of a metal foil. In addition, the conductive sheet is interposed between mounting the electronic component (not shown) on the printed circuit board (not shown) to fix the electronic component to the printed circuit board along the cross-sectional direction, that is, the attachment layer 13. ) And the conductive layer 11 and the adhesion layer 13 can be electrically connected. Therefore, the electronic component can be mounted to be electrically connected on the printed circuit board without soldering.

However, the conductive sheet of the above-described configuration has a problem in that the metal foil constituting the conductive layer has a weak mechanical strength and poor tearing or weak bending strength.

2 is a cross-sectional view of a conductive sheet according to another embodiment of the prior art.

In the conductive sheet according to another embodiment of the prior art, the conductive layer 23 is formed on both surfaces of the support layer 21 made of fibers including synthetic fibers. The conductive layer 23 is formed by plating a conductive metal such as aluminum, copper, nickel, zinc, tin, gold, or silver. And the adhesion layer 25 which electroconductive adhesive or electroconductive adhesive was apply | coated to the surface of any one or all of the conductive layers 23 formed in the both surface of the support layer 21 is formed.

In the conductive sheet having the above-described structure, since the support layer 21 is made of fiber, the conductive layer 23 formed on both surfaces of the support layer 21 by plating is also electrically connected and electrically energized vertically as well. Mechanical strength is improved, such as bending strength being improved without tearing.

However, since the conductive sheet according to another embodiment of the prior art is plated with each of the fibers constituting the support layer, the plated portion is released on the cut or cut portion at the time of cutting or cutting, and the adjacent circuits or electrons are separated by the pulled ol. There was a problem that a short circuit occurs in contact with the component. In addition, since the plating and washing with water are repeated a plurality of times during the manufacture of the conductive sheet, the process is complicated and the productivity is lowered.

It is therefore an object of the present invention to provide a conductive sheet which may be energized vertically along the cross-sectional direction as well as in the horizontal direction.

Another object of the present invention is to provide a conductive sheet capable of preventing unwanted short circuits from occurring when mounting an electronic component on a printed circuit board or when electrically connecting adjacent printed circuit boards.

Still another object of the present invention is to provide a conductive sheet which can be restored to its original form even when deformation such as bending occurs.

Still another object of the present invention is to provide a method for manufacturing a conductive sheet which can prevent environmental pollution since no toxic wastewater is generated.

Still another object of the present invention is to provide a method for manufacturing a conductive sheet which can improve productivity due to a simple manufacturing process.

The conductive sheet according to the present invention for achieving the above object is a first conductive adhesive layer formed by dispersing a first adhesive made of a synthetic resin and a plurality of first conductive powders on a support layer formed of an electrically non-conductive release paper, and the first A conductive net comprising a conductive metal yarn on a conductive adhesive layer, the conductive net being woven into a net form and attached to the first adhesive, wherein the metallic yarn is in contact with the first conductive powder and electrically connected in a cross-sectional direction; And a second conductive adhesive layer formed of a synthetic resin on a network and formed of a plurality of second conductive powders dispersed in contact with the conductive network and the metal yarn and electrically connected in a cross-sectional direction.

In the above, the first and second adhesives are formed by applying a thickness of about 1 to 100 μm with a synthetic resin having good flowability and adhesiveness of polyurethane, polyethylene, acrylic or polyester.

In the above, the first and second conductive powders are formed of powder particles of a conductive metal of copper, nickel, zinc, tin, aluminum, gold or silver having a spherical, plate-like or amorphous form.

In the above, the first and second conductive powders are formed of a conductive metal having powder particles having a size of 1 to 120 µm.

In the above, the conductive net is woven into a net form only with a metal yarn having conductivity.

In the above, the conductive network is woven by replacing synthetic fibers instead of metal yarns every two to five rows of lateral and / or longitudinal fibers, or woven by replacing synthetic yarns instead of metal yarns.

The metal yarn is formed of a single material or a mixture of two or more metals having excellent conductivity, such as copper, gold, silver, zinc, and tin, or carbide having a conductivity such as tungsten, titanium, molybdenum, tantalum, or cobalt. It is formed of containing stainless steel.

In the above, the synthetic fiber yarn is formed of a synthetic resin of polyurethane, polyethylene, acrylic, polyester, polyimide or nylon.

In the above, the conductive network has a diameter of 0.005 to 0.5 mm, preferably 0.01 to 0.2 mm, and the mesh is formed to have 40 to 250 mesh.

Method for producing a conductive sheet according to the present invention for achieving the above another object is a first conductive powder and a conductive metal powder particles of the first adhesive of a liquid synthetic resin with good flowability and adhesion on a support layer made of a release paper And forming the first conductive adhesive layer with the conductive paste, and attaching the conductive mesh woven in the form of a mesh with the first adhesive to the first conductive adhesive layer by using the first adhesive. Attaching the second conductive powder in contact with the first conductive powder so as to be electrically connected in the cross-sectional direction, and forming the second adhesive and the second conductive powder in the same manner as forming the first conductive adhesive layer on a carrier layer made of a release paper separate from the support layer. Forming a second conductive adhesive layer with a conductive paste; And bonding the conductive network formed on the layer and the second conductive adhesive layer formed on the carrier layer to be in contact with the second conductive powder while being attached by the second adhesive so as to be electrically connected in the cross-sectional direction.

In the above, the first and the second conductive adhesive layer is coated with a conductive paste having a size of 1 to 120 μm of powder particles of the conductive metal so that the first adhesive made of the liquid synthetic resin has a thickness of 1 to 100 μm, It is formed by applying by the method of comma coating, offset coating or gravure coating.

In the above, the conductive network formed on the support layer and the second conductive adhesive layer formed on the carrier layer are bonded to each other by thermocompression bonding.

And bonding the conductive network formed on the support layer to the second conductive adhesive layer formed on the carrier layer, and then removing the carrier layer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view of the conductive sheet according to the first embodiment of the present invention, and FIG. 4 is a plan view of the conductive network 39 shown in FIG.

The conductive sheet according to the first embodiment of the present invention is composed of the first conductive adhesive layer 37, the conductive network 39, and the second conductive adhesive layer 47 formed on the support layer 31.

In the above, the support layer 31 may be formed of an electrically non-conductive release paper, and using a conductive sheet composed of the first conductive adhesive layer 37, the conductive network 39, and the second conductive adhesive layer 47 according to the present invention. It is intended to be stored safely so that it will not be damaged or attached to other materials until it is removed.

The first conductive adhesive layer 37 is formed of the first conductive powder 33 and the first adhesive 35 on the support layer 31. In the above, the first adhesive 35 is formed by coating a synthetic resin having good flowability and adhesiveness such as polyurethane, polyethylene, acrylic or polyester to a thickness of about 1 to 100 μm, and forming the first conductive powder 33. Powder particles of a conductive metal such as silver copper, nickel, zinc, tin, aluminum, gold, or silver are formed in a spherical, plate-like or amorphous form such that a plurality of particles are distributed in the first adhesive 35. In the above, the first conductive powder 33 is formed larger than the thickness of the first adhesive 35 in a size of about 1 to 120㎛.

In the above-described first conductive adhesive layer 37, the first conductive powder 33 is applied to a liquid synthetic resin having good flow and adhesive properties, such as polyurethane, polyethylene, acrylic or polyester, which forms the first adhesive 35. By applying a paste in which powder particles of conductive metals such as copper, nickel, zinc, tin, aluminum, gold or silver to be formed are applied onto the support layer 31 by a method such as knife coating, comma coating, offset coating or gravure coating. Is formed.

If the adhesive 35 is formed thicker than 100 μm, the first conductive adhesive layer 37 is likely to generate cracks when dried or used. In addition, since the powder particles of the conductive metal forming the first conductive powder 33 are larger than the thickness of the first adhesive 35, each of the particles of the first conductive powder 33 is applied to the first adhesive 35. Exposed without being covered.

The conductive net 39 is used as a conductive layer, and as shown in FIG. 4, a conductive metal yarn 41 is formed in a woven net form to be attached onto the first conductive adhesive layer 37. In the above-described conductive network 39 while the electricity flows in the horizontal direction by the metal yarn 41, the metal yarn 41 is in contact with the first conductive powder 33 is electrically connected in the cross-sectional direction, that is, the vertical direction .

In the above, the metal yarn 41 may be formed of any metal having conductivity. In particular, the metal yarn 41 is formed of a single material or a mixture of two or more metals having excellent conductivity, such as copper, gold, silver, zinc, and tin, or carbide having a conductivity such as tungsten, titanium, molybdenum, tantalum, or cobalt. It may be formed of stainless steel containing a metal. The metal yarn 41 has a diameter of about 0.005 to 0.5 mm, preferably about 0.01 to 0.2 mm. In addition, the conductive mesh 39 woven from the above-described metal yarn 41 is such that the mesh is about 40 to 250 mesh.

The second conductive adhesive layer 47 is formed of the second adhesive 45 and the second conductive powder 43, has the same structure as the first conductive adhesive layer 37, and is formed on the conductive network 39. The second adhesive 45 and the second conductive powder 43 forming the second conductive adhesive layer 47 also have the same material and the same thickness as the first adhesive 35 and the first conductive powder 33. And particle size. In the above, the second conductive adhesive layer 47 is attached to the conductive network 39 by the second adhesive 45 and in contact with the metal yarn 41 by the second conductive powder 43 so as to have a cross-sectional direction, that is, a vertical direction. Is electrically connected to the Therefore, the conductive sheet is electrically connected not only in the horizontal direction but also in the cross-sectional direction, that is, in the vertical direction by the first conductive adhesive layer 37, the conductive network 39, and the second conductive adhesive layer 47.

The conductive sheet having the above-described configuration may be used to make the first or second conductive adhesive layers 37 and 47 separated from the support layer 31 made of the release paper attached to the first conductive adhesive layer 37 in the electronic products and the automated state. It is attached to a large-scale shielded space such as a control room of a factory or a place using electronic products such as an operating room and an intensive care unit of a hospital and the building itself. Accordingly, the generated electromagnetic waves are absorbed by the second or first conductive adhesive layers 47 and 37 and grounded through the conductive network 39 to shield them.

In addition, the conductive sheet having the above-described configuration has a first conductive adhesive layer 37 and conductive material between the printed circuit board and the electronic component or between adjacent printed circuit boards when the electronic component is mounted on a printed circuit board (PCB) or the like. The network 39 and the second conductive adhesive layer 47 may be electrically connected in a cross-sectional direction, that is, in a vertical direction. When the electronic component is mounted on a printed circuit board (PCB) or the like using the conductive sheet, the first and second conductive adhesive layers 37 and 47 may be attached to the printed circuit board and the electronic component. Although it may be used, the conductive sheet may be bent and formed into a desired shape according to the use.

In addition, since the conductive sheet 39 used as the conductive layer has a high mechanical strength, the above-described conductive sheet is prevented from being damaged during use, and the metal thread 41 is released from the cut or cut portion even when cut or cut. It is suppressed and the short circuit is prevented from coming into contact with adjacent circuits or electronic components.

FIG. 5 is a cross-sectional view of the conductive sheet according to the second embodiment of the present invention, and FIG. 6 is a plan view of the conductive network 39 shown in FIG.

The conductive sheet according to the second embodiment of the present invention is also composed of the first conductive adhesive layer 37, the conductive network 39, and the second conductive adhesive layer 47 formed on the support layer 31. However, the conductive sheet according to the second embodiment of the present invention is configured differently from the conductive sheet according to the first embodiment.

As shown in FIG. 6, the conductive network 39 of the conductive sheet according to the second embodiment of the present invention is formed by being woven into a mesh form of the metal yarn 41 and the synthetic fiber yarn 42. In the above, the conductive net 39 is woven through the synthetic fiber yarn 42 instead of the metal yarn 41 every two to five rows of horizontal and vertical. Synthetic fiber yarn 42 is formed of a synthetic resin such as polyurethane, polyethylene, acrylic, polyester, polyimide or nylon, and the metal yarn 41 is melted during the thermocompression process, which is the final process in the manufacturing process. 2 forms a body with the conductive adhesive layers 37 and 47 to prevent expansion and contraction by heat to prevent deformation of the conductive sheet.

7 is a plan view of the conductive network 39 of the conductive sheet according to the third embodiment of the present invention.

In the conductive sheet according to the third embodiment of the present invention, the conductive network 39 is woven through the synthetic fiber yarn 42 instead of the metal yarn 41 every two to five rows of horizontal or vertical. Synthetic fiber yarn 42 is formed of a synthetic resin such as polyurethane, polyethylene, acrylic, polyester, polyimide or nylon, and the metal yarn 41 is melted during the thermocompression process, which is the final process in the manufacturing process. 2 forms a body with the conductive adhesive layers 37 and 47 to prevent expansion and contraction by heat to prevent deformation of the conductive sheet.

8 is a plan view of a conductive network of a conductive sheet according to a fourth embodiment of the present invention.

In the conductive sheet according to the fourth embodiment of the present invention, the conductive network 39 is woven by using synthetic fiber yarns 42 instead of metal yarns 41 both horizontally and vertically. When the conductive sheet is formed into a desired shape, when the pressure applied to the vertical synthetic fibers 42 rather than the metal yarns 41 of the conductive mesh 39 is bent, the conductive sheet is in its original shape. Is restored.

9A to 9C are balls for manufacturing the conductive sheet according to the first embodiment of the present invention.

Referring to FIG. 9A, a conductive paste is applied to a thickness of about 1 to 100 μm by a method such as knife coating, comma coating, offset coating, or gravure coating on a support layer 31 such as a release paper, to form a first conductive adhesive layer 37. To form. The conductive paste forming the first conductive adhesive layer 37 may include a first adhesive 35 made of a liquid synthetic resin having a good flowability and adhesion such as polyurethane, polyethylene, acrylic or polyester, and copper and nickel. A conductive metal such as zinc, tin, aluminum, gold or silver is composed of a first conductive powder 33 made of powder particles such as spherical, plate-like or amorphous. At this time, the powder of the conductive metal forming the first conductive powder 33 is about 1 to 120㎛ size so as to be exposed without being covered by the first adhesive (35).

Then, the conductive net 39 is mounted on the first conductive adhesive layer 37 and thermally compressed to bond the conductive net 39. The conductive net 39 is formed by being woven in the form of a net with a conductive metal yarn 41. The metallic yarn 41 is contacted with the first conductive powder 33 while being bonded by the first adhesive 35. And electrically connected in the cross-sectional direction, ie in the vertical direction.

The metal yarn 41 is formed of a single material or a mixture of two or more metals having excellent conductivity such as copper, gold, silver, zinc, and tin, or cemented carbide having conductivity such as tungsten, titanium, molybdenum, tantalum, or cobalt. It may be formed of stainless steel comprising a. The metal yarn 41 has a diameter of about 0.005 to 0.5 mm, preferably about 0.01 to 0.2 mm. In addition, the conductive mesh 39 woven from the above-described metal yarn 41 is such that the mesh is about 40 to 250 mesh.

Although the conductive net 39 is formed of only the metal yarn 41, the conductive wire 39 may be formed of the metal yarn 41 and the synthetic fiber yarn 42 as in the second and third exemplary embodiments of the present invention. It may be formed by weaving in the form of a net. Accordingly, the conductive network 39 may be woven by replacing the synthetic fiber yarn 42 instead of the metal yarn 41 every two to five rows of the horizontal and vertical, and horizontal or vertical. The synthetic fiber yarn 42 may be formed of a synthetic resin, such as polyurethane, polyethylene, acrylic, polyester, polyimide or nylon, which is the same as the first conductive adhesive 35.

In addition, as in the fourth embodiment, which is another embodiment of the present invention, the conductive network 39 may be woven by using synthetic fiber yarns 42 instead of metal yarns 41 both horizontally and vertically. Accordingly, the conductive sheet may be restored to its original shape even when the synthetic fiber yarn 42, not the metal yarn 41, is bent.

In addition, since the conductive network 39 is thermocompression-bonded onto the first conductive adhesive layer 37, no toxic wastewater is generated, and thus, environmental pollution is prevented, and a separate washing process is not required, so the manufacturing process is simple and productivity is improved. Can be improved.

Referring to FIG. 9B, the second conductive adhesive layer 47 including the second adhesive 45 and the second conductive powder 43 is formed on the carrier layer 49 formed of release paper or the like apart from the support layer 31. The second adhesive 45 and the second conductive powder 43 constituting the second conductive adhesive layer 47 may include the first adhesive 35 and the first conductive powder 33 constituting the first conductive adhesive layer 37. Is formed identically.

9C, the conductive network 39 formed on the support layer 31 and the second conductive adhesive layer 47 formed on the carrier layer 49 are bonded to each other by thermocompression bonding or the like. Accordingly, the metal yarn 41 forming the conductive net 39 is attached by the second adhesive 45 to be in contact with the second conductive powder 35 and electrically connected in the cross-sectional direction, that is, in the vertical direction. Accordingly, the first conductive adhesive layer 37, the conductive network 39, and the second conductive adhesive layer 47 are electrically conductive in the cross-sectional direction, that is, in the vertical direction.

Thereafter, the carrier layer 49 attached to the second conductive adhesive layer 47 may be removed to reduce the volume when storing the conductive sheet manufactured as described above.

As described above, the conductive sheet according to the present invention is suppressed from being loosened even when the conductive sheet is cut or cut by using a conductive network as the conductive layer between the first and second conductive adhesive layers, and used as the conductive layer. Since the conductive network is attached to the first conductive adhesive layer by thermocompression, no generation of toxic wastewater and no separate washing process are necessary. Further, the conductive network may be woven in every two to five rows of horizontal and / or vertical, or both horizontal and vertical as synthetic fiber yarns instead of metal yarns.

Therefore, the present invention is suppressed from loosening the metal thread of the conductive network constituting the conductive layer even when the conductive sheet is cut or cut, so that when mounting the electronic component on the printed circuit board or electrically connected between adjacent printed circuit boards. This has the advantage of preventing unwanted short circuits from occurring. In addition, since the conductive network is attached to the first conductive adhesive layer by thermocompression bonding, toxic wastewater is not generated, and environmental pollution is not only prevented, and since the washing process is not required, the manufacturing is simple and the productivity can be improved. have. In addition, when thermally compressing the conductive network, the synthetic fiber yarn becomes one body with the first and second conductive adhesive layers to prevent expansion and contraction due to heat of the metal yarn, thereby preventing deformation of the conductive network. The conductive sheet may be restored to its original shape even when the conductive network is woven using synthetic fibers instead of metal yarns in both horizontal and vertical directions so that the synthetic fiber yarns other than the metal yarns are bent.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

Claims (22)

A first conductive adhesive layer formed by dispersing a first adhesive made of a synthetic resin and a plurality of first conductive powders on a support layer formed of an electrically nonconductive release paper, A conductive network woven in a mesh form on the first conductive adhesive layer, the conductive wire being woven in a mesh form and attached to the first adhesive and electrically connected to the first conductive powder in the cross-sectional direction; , A conductive sheet comprising a second conductive adhesive layer formed of a synthetic resin on the conductive network and formed of a plurality of second conductive powders dispersed in contact with the conductive network and the metal yarn and electrically connected in a cross-sectional direction. . The conductive sheet according to claim 1, wherein the first and second adhesives are formed of a synthetic resin having a good flowability and adhesiveness of polyurethane, polyethylene, acrylic or polyester, and applied with a thickness of about 1 to 100 µm. The conductive sheet of claim 1, wherein the first and second conductive powders are formed of powder particles of a conductive metal of copper, nickel, zinc, tin, aluminum, gold, or silver having a spherical shape, a plate shape, or an amorphous form. The conductive sheet according to claim 3, wherein the first and second conductive powders are formed of a conductive metal having powder particles having a size of 1 to 120 µm. The conductive sheet according to claim 1, wherein the conductive network is woven in a mesh form only with a metal yarn having conductivity. The conductive sheet according to claim 1, wherein the conductive network is woven by replacing synthetic fibers with every two to five rows of horizontal and / or vertical lines. The conductive sheet of claim 1, wherein the conductive net is woven by replacing synthetic fibers in both horizontal and vertical directions instead of metal yarns. The method of claim 5, 6 or 7, wherein the metal yarn is formed of a single material or a mixture of two or more of a metal having excellent conductivity such as copper, gold, silver, zinc and tin, or tungsten, titanium, molybdenum, tantalum or cobalt A conductive sheet formed of stainless steel containing a cemented carbide metal having conductivity. The conductive sheet of claim 6 or 7, wherein the synthetic fiber yarn is formed of a synthetic resin of polyurethane, polyethylene, acrylic, polyester, polyimide, or nylon. The conductive sheet according to claim 1, wherein the conductive network has a diameter of 0.005 to 0.5 mm, preferably 0.01 to 0.2 mm. The conductive sheet according to claim 1, wherein the conductive network has a mesh of 40 to 250 mesh. Forming a first conductive adhesive layer with a conductive paste composed of a first adhesive of a liquid synthetic resin and a first conductive powder of conductive metal powder particles on a support layer made of a release paper; The metal yarn is in contact with the first conductive powder and electrically connected in the cross-sectional direction while attaching the conductive network woven in the form of a net to the first conductive adhesive layer by the first adhesive. The process of attaching Forming a second conductive adhesive layer with a conductive paste composed of a second adhesive and a second conductive powder in the same manner as forming the first conductive adhesive layer on a carrier layer made of a release paper separate from the support layer; And bonding the conductive network formed on the support layer and the second conductive adhesive layer formed on the carrier layer to be in contact with the second conductive powder and electrically connected in the cross-sectional direction while the metal yarn is attached by the second adhesive. The manufacturing method of an electroconductive sheet. The conductive paste according to claim 12, wherein the first and second conductive adhesive layers are formed of a conductive paste having a powder particle size of 1 to 120 µm so that the first adhesive made of the liquid synthetic resin has a thickness of 1 to 100 µm. The manufacturing method of the electrically conductive sheet formed by apply | coating and forming by the method of knife coating, comma coating, offset coating, or gravure coating. The method of manufacturing a conductive sheet as set forth in claim 12, wherein the conductive network is woven in a mesh form using only metal yarns having conductivity. The method of manufacturing a conductive sheet of claim 12, wherein the conductive network is woven from synthetic fiber yarns woven with synthetic fiber yarns instead of metal yarns every two to five rows of horizontal and / or vertical wires. The method of manufacturing a conductive sheet of claim 12, wherein the conductive network is woven from synthetic fiber yarns woven by synthetic fiber yarns instead of metal yarns both horizontally and vertically. The metal yarn of claim 12, wherein the metal yarn comprises a single material or a mixture of two or more materials having excellent conductivity of copper, gold, silver, zinc and tin, or a cemented carbide having a conductivity of tungsten, titanium, molybdenum, tantalum or cobalt. The manufacturing method of the electroconductive sheet formed from the metal yarn which consists of stainless steel. The method of manufacturing a conductive sheet according to claim 15 or 16, wherein the synthetic fiber yarn is formed of a synthetic resin of polyurethane, polyethylene, acrylic, or polyester. The method according to claim 12, wherein the conductive network has a diameter of 0.005 to 0.5 mm, preferably 0.01 to 0.2 mm. The method for producing a conductive sheet according to claim 12, wherein the conductive network is formed so that the mesh becomes 40 to 250 mesh. The method for manufacturing a conductive sheet according to claim 12, wherein the conductive network formed on the support layer and the second conductive adhesive layer formed on the carrier layer are bonded to each other by thermocompression bonding. The method of manufacturing a conductive sheet according to claim 12, further comprising the step of removing the carrier layer after bonding the conductive network formed on the support layer and the second conductive adhesive layer formed on the carrier layer.

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