KR20110090399A

KR20110090399A - Touch panel and method of manufacturing the touch panel

Info

Publication number: KR20110090399A
Application number: KR1020100010141A
Authority: KR
Inventors: 송영일; 안종현; 홍병희
Original assignee: 삼성테크윈 주식회사; 성균관대학교산학협력단
Priority date: 2010-02-03
Filing date: 2010-02-03
Publication date: 2011-08-10

Abstract

PURPOSE: A touch panel and a method for manufacturing the same are provided to regularly maintain the gap between conduction layers. CONSTITUTION: A second substrate(130) is placed facing a first substrate. A first conduction layer(120) is placed one or more sides of the first substrate. A second conductive layer(140) is placed at one or more sides of the second substrate. The second conductive layer is made of a graphene. The first electrode is electrically connected with the first conduction layer. The second electrode is electrically connected to the second conduction layer.

Description

Touch panel and method of manufacturing the same {Touch panel and method of manufacturing the touch panel}

The present invention relates to a touch panel and a method for manufacturing the same, and more particularly, to a touch panel and a method for manufacturing the conductive film formed of graphene.

A touch panel is a device which inputs two-dimensional coordinate data by pressing the surface of the display panel with which a electronic telephone, such as a mobile telephone, a portable game machine, a portable information terminal (PDA), is equipped with a hand or a pen.

In particular, since the touch panel can be superimposed on screens of display devices such as LCD (liquid crystal display), OLED (organic light emitting device), PDP (plasma display panel), CRT (brown tube) and the like, its use is increasing dramatically.

In the resistive touch panel, which is a form of the touch panel device, the transparent upper substrate and the lower substrate are arranged to be spaced apart from each other. Each substrate is provided with a transparent conductive film, and the conductive films are formed to face each other. When the user presses the upper substrate by applying a force, the upper substrate is bent to come into contact with the inner conductive layers, and the coordinates of the pressing position are detected according to the change amount of resistance, voltage, etc. generated at this time.

Meanwhile, in the conventional touch panel, materials such as indium tin oxide (ITO) and thiophene-based polymers have been used as the conductive film, and conductive films of various materials are continuously used to improve the characteristics of the touch panel. It is being developed.

It is an object of the present invention to provide a touch panel and a method of manufacturing the same, by which a gap between conductive films can be kept constant by using a conductive film formed of graphene.

According to an aspect of the invention, the first substrate, the second substrate disposed to face the first substrate, the first conductive film disposed on at least one surface of the first substrate, the second substrate is disposed on at least one surface of the graphene A second conductive film, a first electrode electrically connected to the first conductive film, a second electrode electrically connected to the second conductive film, and positioned between the first conductive film and the second conductive film, A touch panel is provided having an intermediate material for maintaining the separation distance of the second conductive film.

Here, the first conductive film may be made of a conductive inorganic material exhibiting a repulsive force with respect to graphene.

And the above-mentioned intermediate material may be a liquid or a gas, the gas may be an inert gas.

The touch panel may further include an intermediate member disposed between the first substrate and the second substrate.

The intermediate member may be a double-sided adhesive member.

The touch panel may further include a first conductor electrically connected to the first electrode and a second conductor electrically connected to the second electrode.

The touch panel may further include a passivation layer covering the second conductive layer.

The protective film may include at least one of PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT / PSS, urethane cured resin or organic silicate compound, thiophene polymer, polypyrrole, polyaniline, ferroelectric polymer, ferroelectric inorganic material.

According to another aspect of the present invention, in the method of manufacturing a touch panel comprising a first substrate on which a first conductive film is disposed and a second substrate on which a second conductive film facing the first conductive film is disposed, (a A) preparing a first substrate and a second substrate, (b) forming a first conductive film on the first substrate, (c) forming a second conductive film of graphene on the second substrate, (d) Forming a first electrode electrically connected with the first conductive film, (e) forming a second electrode electrically connected with the second conductive film, (f) between the first conductive film and the second conductive film A method of manufacturing a touch panel is provided, which is performed by bonding a first substrate and a second substrate so that an intermediate material interposed therebetween maintains a separation distance between the first conductive film and the second conductive film.

Here, step (c) may be performed by transferring graphene to the second substrate using a wet transfer method or a dry transfer method.

The dry transfer method may be a method of performing transfer using a tape.

In addition, the first conductive layer may be made of a conductive inorganic material exhibiting a repulsive force against the graphene.

And (f) may be performed by disposing an intermediate member between the first substrate and the second substrate.

And the intermediate member may be a double-sided adhesive member.

The first electrode and the second electrode may be formed by a screen printing method using a paste containing silver (Ag).

In addition, a step of forming a protective film on the second conductive film may be further performed between steps (c) and (f).

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to an embodiment of the present invention, by forming a conductive film using graphene and injecting an intermediate material exhibiting a predetermined pressure between the conductive films, a distance between the conductive films can be kept constant without spacers.

1 is a schematic exploded perspective view of a touch panel according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a touch panel according to an embodiment of the present invention.
3 is a schematic perspective view illustrating a state in which a second conductive film is disposed on a second substrate of a touch panel according to an embodiment of the present invention.
Figure 4 is a schematic cross-sectional view showing a pressing force acting on the touch panel according to an embodiment of the present invention.
5 is a flowchart illustrating a manufacturing process of a touch panel according to an exemplary embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are only used to distinguish one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, an embodiment of a touch panel and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals, and Duplicate explanations will be omitted.

1 is a schematic exploded perspective view of a touch panel according to an embodiment of the present invention, Figure 2 is a schematic partial cross-sectional view of a touch panel according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is a schematic perspective view showing a state in which a second conductive film is disposed on a second substrate of a touch panel.

The touch panel 100 according to the present embodiment is a resistive touch panel, and includes a first substrate 110, a first conductive layer 120, a second substrate 130, a second conductive layer 140, and a connector. 150, an intermediate member 160.

The first substrate 110 may be made of a transparent glass material.

The first conductive film 120 is disposed on the upper surface of the first substrate 110 and may be made of a conductive inorganic material. The conductive inorganic material may be an indium tin oxide (ITO) material used as a conductive film of a touch panel.

A pair of first electrodes 121 are disposed at the edge of the first conductive layer 120 in the x-axis direction.

Here, the first electrodes 121 perform a function of supplying a voltage to the first conductive film 120 to determine the pressing position, and pastes containing a conductive material such as silver (Ag) and gold (Au). It is formed to have a predetermined pattern shape by using.

The first conductor 111 electrically connecting the first electrodes 121 and the connector 150 to the top surface of the first substrate 110 and the second conductor 112 electrically connected to the second electrode 141. ) Is formed.

Meanwhile, the second substrate 130 may be made of a polymer material that is light transmissive and flexible. For example, the material of the second substrate 130 may be polyethylene terephthalate (PET, polyethyeleneterepthalate), polycarbonate, acrylic, cyclo olefin (cyclo olefin) and the like.

As shown in FIGS. 1 to 3, the second conductive layer 140 is disposed on the inner surface of the second substrate 130 and is made of graphene. The second conductive film made of graphene may be formed by a transfer method.

Graphene is a two-dimensional carbon allotrope, a material that is being studied rapidly in recent years.

Graphene has very useful properties that differ from conventional materials. One notable feature is that when electrons move in graphene, they flow as if the mass of the electrons is zero. This means that the electrons flow at the speed at which light in the vacuum moves, ie at the speed of light. Graphene has an electron mobility of up to 200,000 cm2 / Vs. Graphene exhibits an unusual half-integer quantum Hall effect on electrons and holes, and a fractional quantum Hall effect when suspended in the air.

In addition, since the graphene has an electrical characteristic that changes according to the crystal orientation of the graphene having a given thickness, the user can express the electrical characteristic in a selection direction and thus can easily design the device. The electrical properties of these graphenes are in contrast to carbon nanotubes (CNTs), in which the metallic and semiconducting electrical properties vary depending on chirality and diameter. In the case of CNTs, the process of separating the CNTs in order to use specific semiconductor and metal properties is difficult. In addition, graphene is advantageous in terms of economics as compared to CNTs that undergo purification after synthesis. Therefore, graphene may be effectively used for carbon-based electrical or electromagnetic devices.

Graphene has excellent impact resistance and flexibility than oxide transparent electrodes such as ITO materials, and has high transparency and high electrical conductivity.

The protective film 196 may be formed on the entire surface of the second conductive film 140.

The protective film 196 is to increase the reliability of the touch panel 100 by protecting the second conductive film 140 made of a graphene material, and is a conductive material PEDOT (poly (3,4-ethylenedioxythiophene)) or PEDOT. / PSS, urethane cured resins or organic silicate compounds, thiophene-based polymers, polypyrroles, polyaniline, ferroelectric polymers, ferroelectric inorganics may optionally be used. PEDOT not only has a high visible light transmittance but also an organic material and has a strong affinity with graphene.

In this embodiment, PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT / PSS, urethane cured resin or organosilicate compound, thiophene polymer, polypyrrole, polyaniline, ferroelectric polymer, ferroelectric inorganic material are used as the material of the protective film 196. Although used, the present invention is not limited thereto. That is, the material of the protective film 196 which concerns on this invention should just be a material which is electroconductive and has high visible light transmittance, There are no other special restrictions. For example, as the material of the protective film 196, various kinds of conductive polymers such as thiophene-based polymers, polypyrrole, polyaniline, or the like may be used.

In this embodiment, the protective film 196 is formed on the entire surface of the second conductive film 140, but the present invention is not limited thereto. That is, according to the present invention, the protective film 196 may not be formed at all on the surface of the second conductive film 140. In addition, the passivation layer 196 may not be formed only at a portion of the surface of the second conductive layer 140 where the second electrodes 141 are disposed.

Meanwhile, as shown in FIG. 3, the pair of second electrodes 141 are disposed in the y-axis direction at portions corresponding to the edges of the second conductive layer 140.

Here, the arrangement direction of the second electrodes 141 is disposed to be orthogonal to the arrangement direction of the first electrodes 121. The second electrodes 141 supply a voltage to the second conductive layer 140 and have a predetermined pattern shape by using a paste including a conductive material such as silver (Ag) or gold (Au). It is formed to.

In the present exemplary embodiment, the second electrodes 141 may be formed on the surface of the passivation layer 140a by a screen printing method using a paste-type conductive material such as silver (Ag) or gold (Au).

In the present embodiment, the first conductive film 120 is made of ITO material which is a conductive inorganic material, and the second conductive film 140 is made of graphene material. As such, when the first conductive film is formed of a conductive inorganic material and the second conductive film is formed of graphene, which is a conductive organic material, the graphene organic material of the second substrate and the ITO inorganic material of the first substrate have mutually different repulsive forces. To have.

In addition, in this embodiment, as shown in FIG. 2, an intermediate material 190 for maintaining the separation distance between the first conductive film and the second conductive film at a predetermined pressure is injected between the first conductive film and the second conductive film. . The injected intermediate material 190 is interposed between the first conductive film and the second conductive film to be sealed at an appropriate pressure, and may be a predetermined liquid or gas. This liquid or gas is sealed inside the touch panel to prevent unintended contact from being caused by sagging of the conductive films 120 and 140. And the intermediate material must maintain a constant pressure and volume. Therefore, in the intermediate material, an inert gas may be used that is not sensitive to thermal changes and does not react well with the material used in the touch panel so as to continuously maintain a constant volume. As an inert gas, nitrogen (N 2), argon (Ar), helium (He) gas, or the like may be used.

As described above, the external pressure is not applied to the first conductive film and the second conductive film by adjusting the difference between the physical properties of the first conductive film 120 and the second conductive film 140 and the pressure of the injected intermediate material 190. If not, the predetermined distance can be kept constant. In addition, it is possible to solve the problem of failure caused by sagging of the first conductive film or the second conductive film by the load.

In the related art, a gap between the conductive films is maintained by using a spacer on the conductive film. In this embodiment, by controlling the pressure and volume of the injection gas or liquid and using the different physical properties of the first conductive film and the second conductive film, the problem of unintended short circuits was solved. Therefore, one embodiment of the present invention does not have to perform the conventional screen screen printing process and curing process of the dot spacer (Dot Spacer), it is possible to greatly reduce the cost and manufacturing time when manufacturing a touch panel have.

Meanwhile, the connector 150 may include a first conductive wire 111 electrically connected to the first electrode 121 and a second conductive wire 112 electrically connected to the second electrode 141. It performs the function of connecting, and consists of a flexible circuit board (Flexible circuit board).

The intermediate member 160 has a shape of a rectangular ring having an opening 160a formed therebetween, and is disposed between the first substrate 110 and the second substrate 130 to thereby form the first substrate 110 and the second substrate 130. ) Is fixed to each other at predetermined intervals.

As the intermediate member 160, a double-sided adhesive member having a predetermined thickness may be used. The first substrate 110 and the second substrate 130 are fixed to each other by the adhesive portion of the double-sided adhesive member, and the gap between the first substrate 110 and the second substrate 130 is formed by the thickness of the double-sided adhesive member. do. In addition, the intermediate member 160 performs a function of preventing movement of air between the inside and the outside of the touch panel 100. In this embodiment, the intermediate material 190 interposed between the first conductive film 120 and the second conductive film 140 may be sealed by the intermediate member to maintain a constant pressure.

In this embodiment, the double-sided adhesive member is used as the intermediate member 160, but the present invention is not limited thereto. That is, the intermediate member 160 according to the present invention may be used after curing the adhesive material after applying the adhesive material.

A conductive portion 161 is disposed on the intermediate member 160. The conductive portion 161 includes one end 141a of the second electrode 141 disposed on the surface of the second substrate 130 and the first substrate 110. And electrically connect the second conductor 112 disposed on the surface of the substrate.

Hereinafter, referring to FIG. 4, the operation of the touch panel 100 having the above structure will be described.

4 is a schematic cross-sectional view showing a state in which a pressing force is applied to the touch panel according to the exemplary embodiment of the present invention.

The control device 180 alternately applies a predetermined voltage to the first electrodes 121 and the second electrodes 141 of the touch panel 100. In this state, as shown in FIG. 4, when a desired position of the outer surface of the second substrate 130 is pressed with a pen or a finger, the first conductive layer 120 and the second conductive layer 140 at the pressing point P are pressed. ) Are in contact with each other to flow electricity. At that time, the voltage is detected at the electrode on which the voltage is not applied, and the position on one axis (for example, the x axis) corresponding to the pressing point P is calculated. By alternately performing these processes, the position on the other axis (for example, the y axis) corresponding to the pressing point P is also calculated, thereby detecting the two-dimensional coordinates corresponding to the pressing point P.

As described above, the touch panel 100 includes the second conductive film 140 made of graphene, and thus has the characteristics of high impact resistance, excellent flexibility (flexibility), high transparency, and electrical conductivity of graphene. There is an advantage. That is, the touch panel 100 including graphene is more resistant to external impact, has excellent flexibility, becomes more transparent, and has a faster response speed and use reliability than a touch panel using only conventional ITO electrodes.

Hereinafter, a method of manufacturing a touch panel according to an embodiment of the present invention will be described with reference to FIG. 5. 5 is a flowchart illustrating a manufacturing process of a touch panel according to an exemplary embodiment of the present invention.

The worker prepares the glass, which is the raw material of the first substrate 110, in a predetermined size (step S101).

Next, a first conductive film 120 made of a conductive inorganic material is formed on the first substrate 110 (step S102). The first conductive film 120 may be made of a conductive inorganic material. The first conductive film may be formed of an ITO material by using a thin film forming technique such as vacuum deposition or sputtering.

In addition, the operator may form the first electrodes 121 on the edge of the first conductive layer 120 to have a predetermined pattern by a screen printing method, and further, the first conductor 111 on the first substrate 110. ), The second conductive wire 112 is formed by screen printing or the like (step S103). In this case, the screen printing method uses a paste containing silver (Ag), and curing is performed for about 5 minutes at about 150 ° C to 180 ° C after screen printing.

The worker prepares a flexible polymer such as polyethylene terephthalate (PET, polyethyeleneterepthalate), polycarbonate, cycloolefin, and the like, as the raw material of the second substrate 130 to a predetermined size (step S201).

Next, a second conductive film 140 is formed on the second substrate 130 (step S202).

The second conductive layer 140 is made of graphene, and an operator may transfer the graphene to the second substrate 130 to form the second conductive layer 140.

The conductive inorganic material constituting the first conductive film and the graphene constituting the second conductive film are materials having different physical properties as described above, and have mutually repulsive force. According to the present embodiment, the repulsive force is used as a force for keeping the first conductive film and the second conductive film at a predetermined interval constant.

An example of a method for forming graphene is to form by chemical vapor deposition. Specific methods of forming graphene using chemical vapor deposition are as follows.

First, a silicon wafer having a silicon oxide (SiO 2) layer is prepared. Subsequently, a metal catalyst such as Ni, Cu, Al, Fe, or the like is deposited on the prepared silicon oxide (SiO 2) layer using a sputtering apparatus, an e-beam evaporator, or the like to form a metal catalyst layer. do.

Next, a silicon wafer and a carbon-containing gas (CH 4, C 2 H 2, C 2 H 4, CO, etc.) having a metal catalyst layer formed thereon for thermal chemical vapor deposition and inductively coupled plasma chemical vapor deposition (ICP-CVD). By heating in the reactor, carbon is absorbed into the metal catalyst layer. Then, graphene is grown by rapidly cooling to separate carbon from the metal catalyst layer to crystallize it.

The grown graphene is subjected to separation and transfer for use. For this purpose, a method such as etching is usually used for separation.

The graphene formed by the above method is transferred to the second substrate 130 using a wet transfer method or a dry transfer method to form a second conductive film 140. Here, the dry transfer method may be an indirect transfer method using a UV tape, a temperature-responsive adhesive release tape, or a direct transfer method of directly transferring graphene to the second substrate 130. have.

Next, a protective film 196 is formed on the surface of the second conductive film 140 (step S203). As described above, the material of the protective film 196 of the present embodiment is PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT / PSS, urethane cured resin or organic silicate compound, thiophene polymer, polypyrrole, polyaniline, ferroelectric polymer At least one of the ferroelectric inorganic materials may be selectively used. An operator may form the protective film 196 on the surface of the second conductive film 140 by spin coating, spraying, gravure printing, or the like.

Next, second electrodes 141 are formed in a portion of the passivation layer 196 corresponding to the edge of the second conductive layer 140 (step S204). In this case, the second electrodes 141 are formed by a screen printing method using a paste containing silver (Ag). After screen printing, the second electrodes 141 are cured at about 150 ° C. to 180 ° C. for about 5 minutes. do.

By the above method, the first substrate 110, the first conductor 111, the second conductor 112, the first conductive layer 120, the first electrodes 121, the second substrate 130, and the second substrate After the conductive film 140 and the second electrodes 141 are formed, the connector 150 is connected to one end of the first conductive wire 111 and the second conductive wire 112 (step S301).

Then, the first substrate 110 and the second substrate 130 are bonded using the intermediate member 160 (step S302). That is, since the intermediate member 160 is formed of a double-sided adhesive member, the first substrate 110 and the second substrate 130 may be bonded to each other.

In the present embodiment, the intermediate substrate 190 which maintains the separation distance between the first conductive layer 120 and the second conductive layer 140 in the process of bonding the first substrate and the second substrate to the first substrate 110. Is injected between the second substrate 130 and the second substrate 130. The injected intermediate material is interposed between the first conductive film and the second conductive film while maintaining a predetermined pressure, and is sealed by the joint by the intermediate member. As described above, the intermediate material may be a liquid or a gas, wherein the gas may be an inert gas such as nitrogen (N 2), argon (Ar), helium (He) gas, or the like, and may not be pressurized by the user. The first conductive film and the second conductive film are prevented from sticking together.

The conductive portion 161 formed on the intermediate member 160 includes one end 141a of the second electrode 141 formed on the second conductive film 140 and a second conductive line formed on the first substrate 110. The touch panel 100 is completed by aligning and bonding the positions of the intermediate members 160 to electrically connect the 112.

In the present embodiment, first, the connector 150 is connected to the first substrate 110, and then the first substrate 110 and the second substrate 130 are bonded to each other. However, the present invention is not limited thereto. That is, according to the present invention, after the first substrate 110 and the second substrate 130 are bonded, the connector 150 may be connected to the first substrate 110, in which case the first substrate 110 The part in which the connector 150 is disposed is a structure in which the connector 150 can be connected even after the first substrate 110 and the second substrate 130 are joined (for example, a shape structure protruding to the outside). Must have

In the description of the exemplary embodiment of the present invention, the first substrate and the second substrate refer to the lower substrate and the upper substrate, respectively, in the drawings, but the first and second terms define the position of the lower or upper layer. It is not meant to mean one substrate and the other substrate to be bonded. Therefore, a structure in which the positions of the first substrate and the second substrate are opposite to those of the accompanying drawings in the description of the present invention will also belong to the scope of the present invention. The first conductive film and the second conductive film are also the same.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

100: touch panel 110: first substrate
111: first conductor 112: second conductor
120: first conductive film 121: first electrode
130: second substrate 140: second conductive film
141: second electrode 150: connector
160: intermediate member 180: controller
190: intermediate 196: protective film

Claims

First substrate;
A second substrate disposed to face the first substrate;
A first conductive film disposed on at least one surface of the first substrate;
A second conductive film disposed on at least one surface of the second substrate and made of graphene;
A first electrode electrically connected to the first conductive film;
A second electrode electrically connected to the second conductive film; And
And an intermediate material positioned between the first conductive layer and the second conductive layer to maintain a separation distance between the first conductive layer and the second conductive layer.

The method of claim 1,
The first conductive layer is made of a conductive inorganic material exhibiting a repulsive force with respect to the graphene, the touch panel

The method of claim 1,
Wherein said intermediate material is a liquid or a gas.

The method of claim 3,
The gas is an inert gas, the touch panel.

The method of claim 1,
The touch panel further comprises an intermediate member disposed between the first substrate and the second substrate.

The method of claim 5,
And the intermediate member is a double-sided adhesive member.

The method of claim 1,
A first lead electrically connected to the first electrode; And
The touch panel further comprises a second lead electrically connected to the second electrode.

The method of claim 1,
The touch panel further includes a passivation layer covering the second conductive layer.

The method of claim 8,
The protective layer may include at least one of PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT / PSS, urethane cured resin or organic silicate compound, thiophene polymer, polypyrrole, polyaniline, ferroelectric polymer, ferroelectric inorganic material. .

In the manufacturing method of a touch panel comprising a first substrate on which a first conductive film is disposed, and a second substrate on which a second conductive film facing the first conductive film is disposed;
(a) preparing the first substrate and the second substrate;
(b) forming a first conductive film on the first substrate;
(c) forming a second conductive film made of graphene on the second substrate;
(d) forming a first electrode electrically connected to the first conductive film;
(e) forming a second electrode electrically connected to the second conductive film;
(f) bonding the first substrate to the second substrate so that an intermediate material interposed between the first conductive layer and the second conductive layer to maintain a separation distance between the first conductive layer and the second conductive layer is interposed therebetween. Method of manufacturing a touch panel comprising the step.

The method of claim 10,
The step (c) is performed by transferring the graphene to the second substrate using a wet transfer method or a dry transfer method, a touch panel manufacturing method.

The method of claim 11,
The dry transfer method is a method of manufacturing a touch panel, the transfer using a tape.

The method of claim 10,
The first conductive film is made of a conductive inorganic material exhibiting a repulsive force with respect to the graphene, the manufacturing method of the touch panel.

The method of claim 10,
And the intermediate material is a liquid or a gas.

The method of claim 14,
The gas is an inert gas, a method for producing a touch panel.

The method of claim 10,
The step (f) is performed by disposing an intermediate member between the first substrate and the second substrate.

The method of claim 16,
And the intermediate member is a double-sided adhesive member.

The method of claim 10,
And the first electrode and the second electrode are formed by a screen printing method using a paste containing silver (Ag).

The method of claim 10,
Between step (c) and step (f),
Forming a protective film on the second conductive film further comprising the manufacturing method of the touch panel.

The method of claim 19,
The protective layer may include at least one of PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT / PSS, urethane cured resin or organic silicate compound, thiophene polymer, polypyrrole, polyaniline, ferroelectric polymer, ferroelectric inorganic material. Manufacturing method.