KR20150105538A - Touch panel and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a touch panel and a manufacturing method thereof. According to an embodiment of the present invention, the touch panel includes: a transparent substrate; a supporting layer formed on one side of the transparent substrate; a plurality of concave grooves formed on one side of the supporting layer; and a sensing electrode formed as filling the concave groove with a conductive material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a touch panel,

The present invention relates to a touch panel and a method of manufacturing the same, and more particularly, to a touch panel in which a support layer having a plurality of recesses is formed on a surface of a transparent substrate, a sensing electrode is formed by a conductive material filled in the recess, And a manufacturing method thereof.

2. Description of the Related Art In recent years, the use of computers has been gradually expanded in accordance with the rapid progress of the information society. As a result, it is difficult to efficiently operate a product using only a keyboard and a mouse. Therefore, there is an increasing need for a device that is simple and less error-prone, and that allows anyone to easily input information.

In addition, the technology related to the input device is shifting beyond the level that meets general functions, and attention is shifting to high reliability, durability, innovation, design and processing related technology, etc. In order to achieve this purpose, As a possible input device, a touch panel has been developed.

The touch panel is provided on the display surface of a flat display device such as an electronic notebook, a liquid crystal display device (LCD), a plasma display panel (PDP), and an electroluminescence (EL) device and an image display device such as a CRT (Cathode Ray Tube) And is used to allow the user to select desired information while viewing the image display device.

Such a touch panel may be a resistive type, a capacitive type, an electro-magnetic type, a SAW type (Surface Acoustic type), and an infrared type Respectively. These various types of touch panels are employed in electronic products in consideration of problems of signal amplification, differences in resolution, difficulty in design and processing technology, optical characteristics, electrical characteristics, mechanical characteristics, environmental characteristics, input characteristics, durability and economical efficiency Currently, the most widely used methods are resistive touch panels and capacitive touch panels.

1 is a view showing a structure of a touch panel disclosed in Korean Patent Laid-Open Publication No. 10-2011-0111222 (published on October 10, 2011).

The conventional touch panel 1 shown in Fig. 1 has a film layer 4 on which an OCA layer 3 is formed on at least one side and a film layer 4 is formed on the transparent substrate 2 by using the OCA layer 3. [ A transparent electrode 4 such as ITO or the like is formed on the upper surface of the film layer 4 so that the sensing electrode 5 is formed on the surface facing the transparent substrate 2 with respect to the film layer 4, The sensing electrode 5 is formed using a conductive material.

In the conventional touch panel 1 having the above configuration, the thickness of the touch panel 1 increases as the OCA layer 3 and the film layer 4 are sequentially formed on the transparent substrate 2 , The sensitivity of the touch panel 1 is deteriorated.

Further, in manufacturing the conventional touch panel 1, a step of attaching the film layer 4 using the OCA layer 3 as an adhesive layer is added to the upper surface of the transparent substrate 2, And the quality control is difficult due to the inflow of bubbles and foreign substances generated in the process of attaching the film layer 4. In addition, Such a problem is a factor that makes it difficult to manufacture a large area touch panel in particular.

KR 10-2011-0111222 A (October 10, 2011 open)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and one embodiment of the present invention is a touch panel having a thin thickness, excellent conductivity, .

According to an embodiment of the present invention, there is provided a liquid crystal display comprising: a transparent substrate; A supporting layer formed on one surface of the transparent substrate; A plurality of grooves formed on one surface of the support layer; And a sensing electrode formed by filling the groove with a conductive material.

Here, the touch panel according to an embodiment of the present invention may further include a coating layer coated on the bottom surface of the groove.

At this time, the coating layer may be formed of a carbon nanostructure.

At this time, it is preferable that the carbon nanostructure is carbon nanotube (CNT) or graphene.

The display device may further include a print layer formed along one edge of the transparent substrate.

The sensing electrode forms a mesh pattern on one side of the supporting layer.

The support layer is made of an ultraviolet curing resin.

The conductive material includes any metal or alloy thereof selected from the group consisting of silver, copper, zinc, gold, aluminum, titanium, palladium, and chromium.

Preferably, the conductive material is a conductive metal paste.

(A) preparing a transparent substrate; (b) forming a supporting layer on one surface of the transparent substrate; (c) forming a plurality of grooves on one surface of the support layer; And (d) filling the groove with a conductive material to form a sensing electrode.

The step (a) includes the steps of: (a-1) forming a print layer along one edge of the transparent substrate.

In the step (b), an ultraviolet curable resin is applied to one surface of the transparent substrate to form the support layer.

In the step (c), a mold having a plurality of protrusions at the lower end of the step (c-1) is pressed against the support layer to form recesses corresponding to the protrusions on one surface of the support layer. And (c-2) irradiating ultraviolet light for curing the support layer.

The step (c) may further include the step of (c-3) coating the carbon nanostructure on the bottom surface of the groove to form a coating layer.

At this time, it is preferable that the carbon nanostructure is carbon nanotube (CNT) or graphene.

In the step (d), the sensing electrode is formed by filling the groove with a conductive metal paste.

At this time, the conductive metal paste is filled in the groove by a dot blade, and the conductive metal paste leaked to the outside of the groove is removed using an organic solvent.

The mold may further include: (cc-1) forming, by a photoresist, a first pre-mold having a photoresist portion corresponding to the protrusion at a bottom of a transparent body; (cc-2) forming a second pre-mold formed on one surface of the plurality of grooves corresponding to the photoresist portion by a transfer process using the first pre-mold; And (cc-3) forming the mold by a transfer process using the second pre-mold.

According to the touch panel and the manufacturing method thereof according to an embodiment of the present invention, the conventional OCA layer and the film layer are eliminated, thereby reducing the thickness of the touch panel and improving the conductivity.

Also, conventionally, a process of incorporating an OCA layer and a film layer is required. In addition, a large-area touch panel is difficult to be combined with the touch panel, and defects arise due to bubble generation in the coalescing process. However, Since the OCA layer and the film layer are removed, a separate coalescing process is not required, and therefore quality control is easy.

In addition, since the sensing electrode is embedded in the groove of the supporting layer, the sensing electrode can be prevented from being separated and the durability of the touch panel can be improved.

In addition, since the preformed mold is pressed against one surface of the support layer to form the groove, the manufacturing process can be simplified and the cost can be reduced.

1 is a cross-sectional view showing a structure of a conventional touch panel.
2 is a cross-sectional view illustrating the structure of a touch panel according to an embodiment of the present invention.
3 is a cross-sectional view illustrating the structure of a touch panel according to another embodiment of the present invention.
4 to 8 are flow charts showing a manufacturing process of a touch panel according to an embodiment of the present invention.
9 to 14 are process flow diagrams illustrating a process for manufacturing a mold according to an embodiment of the present invention.

Hereinafter, preferred embodiments of a touch panel and a manufacturing method thereof according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

For example, where a layer is referred to herein as being "on" another layer or substrate, it may be formed directly on another layer or substrate, or a third layer may be interposed therebetween. In the present specification, directional expressions of the upper side, the upper side (upper side), the upper side, and the like can be understood to mean lower, lower (lower), lower side and the like. That is, the expression of the spatial direction should be understood in a relative direction, and it should not be construed as definitively as an absolute direction.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

Example

2 is a cross-sectional view illustrating the structure of a touch panel according to an embodiment of the present invention.

2, a touch panel 10 according to an exemplary embodiment of the present invention includes a transparent substrate 20, a support layer 30 formed on one surface (upper side in the drawing) of the transparent substrate 20, A plurality of recesses 40 formed on one surface (upper side in the drawing) of the support layer 30 and sensing electrodes 50 formed by filling the recesses 40 with a conductive material.

The touch panel 10 according to an exemplary embodiment of the present invention may further include a print layer 60 formed along one edge of the transparent substrate 20.

The transparent substrate 20 should have transparency to such an extent that the image of an image display device (not shown) such as an LCD can be visually recognized. Therefore, the transparent substrate 20 can be made of a material having high light transmittance such as glass, acrylic resin, etc., or a material such as PET (polyethylene terephthalate), PC (polycarbonate), PES (polyether sulfone) but are not limited to, polymethly methacrylate, sapphire glass, tempered glass, and the like.

On the other hand, one side of the transparent substrate 20 may be divided into an active region and a non-active region. Here, the active area refers to an area capable of visually confirming an image of the image display device and capable of sensing a touch operation by contact of a conductive object such as a user's body or a stylus pen. The inactive region refers to a region extending to a predetermined width along the rim of the transparent substrate 20 so as to surround the active region, and the printing layer 60 described later is formed to correspond to the inactive region.

At this time, in order to prevent damage or breakage of the transparent substrate 20 during use of the touch panel 10, a film-like protective layer (not shown) is formed on the other surface Can be formed. The protective layer protects the transparent substrate 20 from an external impact or a scratch, and can be selectively attached as required by an adhesive or the like.

Here, the term " contact " by the touch operation, which is generally used herein, does not only mean a direct contact with the contact receiving surface but also includes a case where a conductive object But also includes a meaning of approaching the contact receiving surface by a considerable distance. That is, the touch panel 10 according to an embodiment of the present invention should be interpreted as a panel having a function of recognizing direct contact of a conductive object or recognizing proximity to a distance within a considerable distance.

The print layer 60 is formed along the rim of one surface of the transparent substrate 20 in a predetermined width and thickness (for example, 10 mu m to 20 mu m) in a region corresponding to the inactive region. At this time, the print layer 60 may be formed by various printing methods such as a screen printing method and a spin coating method using black, white, or color ink.

The printed layer 60 functions as a frame surrounding the screen of the image display device on which the touch panel 10 is mounted and the wiring 70 connecting the sensing electrode 50 and a control unit Thereby helping to improve the appearance design. The print layer 60 may also be used as an area for displaying product information such as a logo, a brand name, and a model name of a manufacturer or a sales company.

The support layer 30 is formed on one side of the transparent substrate 20, and the print layer 60 is accommodated in the support layer 30. That is, the thickness of the support layer 30 is thicker than the thickness of the print layer 60 and is formed so as to cover the active region of the transparent substrate 20 and the print layer 60 at the same time. At this time, one side (upper side in the drawing) of the support layer 30 opposite to the transparent substrate 20 is preferably formed as a flat surface without a change in thickness.

The support layer 30 is preferably formed of an acrylic resin having excellent strength because it needs to have a predetermined strength in order to prevent the groove 40, which will be described later, from being deformed by heat or external force. The support layer 30 is preferably formed of an ultraviolet curing resin in order to easily form the groove 40 by a transfer process to be described later.

A plurality of grooves (40) are formed on one side of the support layer (30). At this time, a plurality of grooves 40 form a grid-like mesh pattern on one surface of the support layer 30. The distance (for example, 2 탆 to 4 탆, preferably 3 탆) or the distance between the grooves 40 (for example, 1 탆 to 3 탆, preferably 2 탆) For example, 80 占 퐉 to 120 占 퐉, preferably 100 占 퐉) and the like can be suitably selected as needed.

The groove 40 may be formed by a method such as machining or etching. In order to apply the touch panel 10 to the mass production of the touch panel 10, a mold having a plurality of protrusions corresponding to the groove 40 It is preferable to press the support layer 30 to form a groove 40 and then to separate the mold and to harden the support layer 30 with the groove 40 so that the shape of the groove 40 is maintained.

The sensing electrode 50 is formed on one surface of the support layer 30 by filling the plurality of grooves 40 forming the grid-like mesh pattern with the conductive material. At this time, the conductive material may include any one metal selected from the group consisting of silver, copper, zinc, gold, aluminum, titanium, palladium, and chromium or an alloy thereof, but is not limited thereto. Are all included.

Preferably, the sensing electrode 50 is formed by filling the conductive grooves 40 with the conductive metal paste prepared by forming the conductive material in the form of a paste. At this time, since the sensing electrode 50 is formed as a grid-like mesh pattern, the light transmittance of the touch panel 10 can be ensured despite the opacity of the metal.

Since the sensing electrode 50 according to the embodiment of the present invention is embedded on one surface of the supporting layer 30, the sensing electrode 50 is formed on the surface of the film or the transparent substrate 20 by printing or the like, The effect of reducing the thickness of the substrate 10 can be seen. In addition, since the sensing electrode 50 is firmly supported in the groove 40, it is possible to prevent peeling due to heat or an external force during use, thereby improving the durability of the touch panel 10.

The touch panel 10 having the above-described structure according to the embodiment of the present invention is configured such that as the conventional OCA layer 3 (see FIG. 1) and the film layer 4 (see FIG. 1) The thickness of the substrate 10 is reduced. In addition, since the conventional process for attaching the film layer 4 is not necessary, it is possible to prevent the occurrence of defects in the process of attaching the film layer 4, thereby improving the productivity and facilitating the realization of the large-area touch panel 10.

The sensing electrode 50 is connected to a control unit (not shown) of a circuit board (not shown) through a wiring 70 disposed in an inactive region. Receives the detection signal, and performs an operation related to the contact determination based on the sensed signal.

For example, in the case of the electrostatic capacitance type, when a user's body or a conductive object such as a stylus pen touches the transparent substrate 20, the transparent substrate 20 is made to be a dielectric So that a predetermined capacitance change occurs. This capacitance change is measured by the control unit of the circuit board through the wiring 70, and the control unit determines the contact state, the number of contact inputs, the contact position, and the like through the measured capacitance change.

According to an embodiment of the present invention, at least one of the recesses 40 in the inactive region is filled with a conductive material having an excellent electrical conductivity to form the wiring 70. The wiring 70 may be formed of a material different from that of the sensing electrode 50, and is preferably formed of the same material as the sensing electrode 50. In the case where the sensing electrode 50 and the wiring 70 are formed of the same material, the wiring 70 can be formed at the same time in the same process of forming the sensing electrode 50, There is a saving effect.

3 is a cross-sectional view illustrating the structure of a touch panel according to another embodiment of the present invention. The touch panel 10 'according to another embodiment of the present invention differs from the structure of the above-described embodiment in that the coating layer 51 is formed on the bottom surface of the groove 40. Therefore, the same reference numerals are assigned to the same components as those in the above-described embodiment, and redundant description is omitted.

According to another embodiment of the present invention, a coating layer 51 coated with a carbon nanostructure is formed on the bottom surface of the groove 40 and the sensing electrode 50 'is formed on the coating layer 51 and on the coating layer 51 And a filling layer (52) filled in the groove (40).

At this time, the coating layer 51 is formed of a carbon nano structure such as carbon nanotube (CNT) or graphene. The coating layer 51 is formed by various methods such as coating, spraying, printing, . It goes without saying that the coating layer 51 may be formed on both side walls of the groove 40 together with the bottom surface of the groove 40.

The filling layer 52 is formed by filling a conductive material into the recesses 40. The conductive material may be any metal selected from the group consisting of silver, copper, zinc, gold, aluminum, titanium, palladium, But the present invention is not limited thereto, and any metal having high electrical conductivity may be included.

Preferably, the sensing electrode 50 'is formed by filling conductive grooves 40 with a conductive metal paste, for example, Ag paste, in the form of a paste.

A coating layer made of carbon nanotubes (CNT) or graphene or the like is formed on the bottom surface or the surface of the groove 40 including the bottom surface and both side walls of the groove 40 as in the present embodiment 51 is formed, blackening of the sensing electrode 50 'is performed to improve the visibility.

That is, since the sensing electrode 50 is formed of the conductive metal paste, the mesh pattern may be prominent due to the high reflectance characteristic of the metal, or may be colored white, copper (Cu ), It may affect the overall color of the screen, thus distorting the image.

However, in the present embodiment, the groove 40 is filled with a conductive metal paste such as silver (Ag) or copper (Cu), but the bottom surface of the groove 40, that is, The coating layer 51 made of the carbon nanostructure is formed on one side of the substrate, and the filling layer 52 inside the coating layer 51 is visually subjected to the blackening treatment, thereby making it possible to prevent the above-described problems.

Hereinafter, a method of manufacturing a touch panel according to an embodiment of the present invention will be described with reference to FIGS.

4 to 8 are flow charts showing a manufacturing process of a touch panel according to an embodiment of the present invention.

Preparing a transparent substrate 20;

The transparent substrate 20 is prepared as shown in FIG. The dimensions such as the width, length and thickness of the transparent substrate 20 can be appropriately selected as needed.

At this time, it is preferable that the printing layer 60 is formed along the edge of one side of the transparent substrate 20 in a region corresponding to the inactive region of the transparent substrate 20. The printing layer 60 may be formed by applying a photosensitive resin such as black, white or color ink using various printing methods such as screen printing or spin coating and then forming it by exposure and development, And may be formed on the substrate 20.

Forming a support layer (30) on one side of the transparent substrate (20)

A supporting layer 30 is formed on one surface of the transparent substrate 20 as shown in FIG. The support layer 30 is preferably made of an ultraviolet curable resin and is formed to cover the active region of the transparent substrate 20 and the print layer 60. At this time, the support layer 30 may be formed by various methods such as printing, coating, or spraying.

On one surface of the support layer 30, The groove (40)  Forming step:

First, a mold 100 having a plurality of protrusions 110 at the lower end thereof is prepared. The protrusion 110 of the mold 100 is formed in a shape corresponding to the groove 40 to be formed on one surface of the support layer 30. The number of the protrusions 110 of the mold 100 is equal to the number of protrusions 110 of the support layer 30. [ The number of the grooves 40 to be formed on one surface of the substrate 40 is equal to the number of the grooves 40 to be formed. In addition, the mold 100 is preferably made of a transparent material such as glass, tempered glass, or resin as the transparent substrate 20.

6, the mold 100 is pressed against the supporting layer 30 with the protruding portion 110 of the mold 100 facing one side of the supporting layer 30, and the mold 100 is pressed against the supporting layer 30 as the ultraviolet hardening resin And irradiated with ultraviolet rays to be cured. At this time, ultraviolet rays can be irradiated onto the support layer 30 through the mold 100 at the upper part of the mold 100, and ultraviolet rays can be irradiated onto the support layer 30 through the transparent substrate 20 under the transparent substrate 20 It is also possible.

Upon completion of the press process by the pressure of the mold 100 and the curing process of the support layer 30 by ultraviolet irradiation, the mold 100 is separated from the cured support layer 30 as shown in Fig. At this time, a plurality of grooves 40 are formed on one side of the support layer 30 while the protrusions 110 at the lower end of the mold 100 are pressed against the support layer 30.

The groove (40) on  Conductivity Metal material By filling  Forming the sensing electrode (50)

As shown in FIG. 8, the sensing electrode 50 is formed by filling conductive grooves 40 with a conductive metal paste. At this time, the grooves 40 corresponding to the inactive area are filled with the conductive metal paste, so that the wiring 70 connecting the sensing electrode 50 and the control unit can be formed at the same time.

As an example, the filling of the conductive metal paste may be performed by a dot blade 200. That is, a conductive metal paste is coated on one side of the support layer 30 and then scratched with the daughter blade 200 to fill the respective recesses 40. The conductive metal paste that leaks to the outside of the recess 40 or remains between the recess 40 and the recess 40 is wiped with an organic solvent such as acetone, IPA (iso propyl alcohol), or MEK (methylethylketone) Remove.

In the manufacturing of the touch panel 10 according to the embodiment of the present invention, the application of a method such as machining or etching in forming the plurality of grooves 40 in the support layer 30 is effective in reducing manufacturing time and cost The productivity is low and it is not suitable for mass production. Accordingly, in the method of manufacturing the touch panel 10 according to the embodiment of the present invention, the recesses 40 are formed by using the mold 100 as described above. At this time, in order to prevent the mold 100 from being deformed or broken in the process of pressing the mold 100 on the support layer 30, it is necessary to prepare a large number of spare molds 100 in advance.

However, manufacturing the redundant molds 100 by machining one by one may not only increase the cost, but also may result in difficult processing steps due to the material properties of the transparent mold 100 having the strength. There is a problem that immediate response is difficult.

Therefore, the manufacturing method of the touch panel 10 according to an embodiment of the present invention includes a plurality of transfer processes for manufacturing the mold 100, and will be described in detail with reference to FIGS. 9 to 14 .

1st free Mold (300) forming step:

The first preform 300 and the first preform 400 are prepared as shown in FIG. The first pre-mold 300 may be formed in the same shape as the mold 100 and the body 310 of the first pre-mold 300 may be formed of a transparent material such as glass or synthetic resin. A plurality of photoresist portions 320 corresponding to the protrusions 110 of the mold 100 are formed on the lower end of the body 310 of the first pre-mold 300 by a photoresist.

The first preform 400 includes a first preform body 410 made of a transparent material such as glass or synthetic resin and a first cured resin layer (not shown) formed on the upper side of the first preform body 410 420).

Second free Mold (500) Formation step:

The second pre-mold 500, which is a reverse phase of the first pre-mold 300, is manufactured by the transfer process using the first pre-mold 300.

10, after the first preform 400 is pressed against the first preform 400 with the photoresist 320 facing one side of the first preform 400, the first preform 400 is pressed against the first preform 400, The first cured resin layer 420 of the preform 400 is irradiated with ultraviolet rays. At this time, ultraviolet rays can be transmitted through the first pre-mold 300 and irradiated onto the first cured resin layer 420, and the ultraviolet rays can be transmitted through the first preform body 410 and irradiated onto the first cured resin layer 420 It is also possible.

After the curing of the first cured resin layer 420 is completed, the first pre-mold 300 is separated from the first preform 400 as shown in FIG. At this time, the first preform 400 is made of a second preform 500 having a plurality of grooves 510 formed on one surface of the first cured resin layer 420.

Mold (100) forming step:

The mold 100 used in manufacturing the touch panel 10 according to the embodiment of the present invention is manufactured in the reverse phase of the second pre-mold 500 by the transfer process using the second pre-mold 500.

12, the second pre-mold 500 manufactured in the second pre-mold 500 forming step and the second pre-formed body 610 are formed in the same shape as the first pre- And a second cured resin layer 620 are prepared. The second cured resin layer 620 is preferably made of an ultraviolet curable resin and a releasing member 520 such as a self assembled monolayer (SAM) is formed on one surface of the second pre-mold 500 having the plurality of trenches 510 formed thereon. Is preferably coated.

13, the second preform 500 is pressed onto the second preform 600 with the groove 510 facing the first surface of the second preform 600, and then the second preform 600 is pressed against the second preform 600 600 to the second cured resin layer 620 with ultraviolet rays. At this time, ultraviolet rays can be transmitted through the second pre-mold 500 to be irradiated onto the second cured resin layer 620, and the ultraviolet rays can be transmitted through the second preform body 610 and irradiated onto the second cured resin layer 620 It is also possible.

After the curing of the second cured resin layer 620 is completed, the second pre-mold 500 is separated from the second preform 600 as shown in Fig. At this time, the second preform 600 is made of a mold 100 having a plurality of protrusions 110 formed on one surface of the second cured resin layer 620.

At this time, if necessary, a step of reinforcing the rigidity of the mold 100 by forming a metal coating layer (not shown) on the protrusion 110 of the mold 100 may be further performed.

As described above, when the mold 100 is manufactured by repeating the transfer process according to the embodiment of the present invention, even if the pattern of the groove 40 of the support layer 30 is changed in accordance with the model change, A new mold 100 for manufacturing the touch panel 10 can be easily manufactured by changing the arrangement of the photoresist portions 320 by the photoresist process in the step of forming the touch panel 10, The user can immediately respond to various model changes.

The second pre-mold 500 may be coated on one surface of the second pre-mold 500 to prevent the second pre-mold 500 from being deformed or damaged, The mold 100 can be easily secured immediately.

10, 10 ': touch panel 20: transparent substrate
30: support layer 40: groove
50, 50 ': sensing electrode 60: printing layer
70: wiring 100: mold
200: Daughter blade 300: First pre-mold
400: first preform 500: second preform
600: second preform

Claims (18)

A transparent substrate;
A supporting layer formed on one surface of the transparent substrate;
A plurality of grooves formed on one surface of the support layer; And
And a sensing electrode formed by filling the groove with a conductive material.
The method according to claim 1,
And a coating layer coated on a bottom surface of the groove.
The method of claim 2,
Wherein the coating layer is made of a carbon nanostructure.
The method of claim 3,
Wherein the carbon nanostructure is a carbon nanotube (CNT) or a graphene.
The method according to claim 1,
And a printed layer formed along one edge of the transparent substrate.
The method according to claim 1,
Wherein the sensing electrode forms a mesh pattern on one side of the supporting layer.
The method according to claim 1,
Wherein the support layer is made of an ultraviolet curing resin.
The method according to claim 1,
Wherein the conductive material comprises any one metal selected from the group consisting of silver, copper, zinc, gold, aluminum, titanium, palladium and chrome or an alloy thereof.
The method according to claim 1,
Wherein the conductive material is a conductive metal paste.
(a) preparing a transparent substrate;
(b) forming a supporting layer on one surface of the transparent substrate;
(c) forming a plurality of grooves on one surface of the support layer; And
(d) filling the groove with a conductive material to form a sensing electrode.
The method of claim 10, wherein the step (a)
(a-1) forming a printed layer along one edge of the transparent substrate.
12. The method of claim 10, wherein step (b)
Wherein a supporting layer is formed by applying an ultraviolet curable resin to one surface of the transparent substrate.
11. The method of claim 10, wherein step (c)
(c-1) pressing a mold having a plurality of protrusions at a lower end thereof to the support layer, thereby forming recesses corresponding to the protrusions on one surface of the support layer; And
(c-2) irradiating ultraviolet light for curing the support layer.
14. The method of claim 13, wherein step (c)
(c-3) coating the carbon nanostructure on the bottom surface of the groove to form a coating layer.
15. The method of claim 14,
Wherein the carbon nanostructure is carbon nanotube (CNT) or graphene.
11. The method of claim 10, wherein step (d)
And filling the groove with a conductive metal paste to form the sensing electrode.
17. The method of claim 16, wherein step (d)
Wherein the conductive metal paste is filled in the groove by a dotar blade and the conductive metal paste leaked to the outside of the groove is removed by using an organic solvent.
14. The mold of claim 13,
(cc-1) forming a first pre-mold by photoresist, wherein a photoresist portion corresponding to the protrusions is formed at the bottom of the transparent body;
(cc-2) forming a second pre-mold formed on one surface of the plurality of grooves corresponding to the photoresist portion by a transfer process using the first pre-mold; And
(cc-3) a step of forming the mold by a transfer process using the second pre-mold.

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