WO2015069048A1

WO2015069048A1 - Touch panel for implementing touch sensor using one sheet of film and method for manufacturing same

Info

Publication number: WO2015069048A1
Application number: PCT/KR2014/010636
Authority: WO
Inventors: 박준영; 정주현; 송영진; 노수천; 한원희; 김기보
Original assignee: 주식회사 티메이; 박준영
Priority date: 2013-11-11
Filing date: 2014-11-06
Publication date: 2015-05-14

Abstract

A method for manufacturing a touch panel comprises the steps of: forming a plurality of electrostatic electrodes which correspond to window regions of a touch panel and are spaced at each predetermined distance interval in a widthwise direction, and forming, as transparent conductive layers, first axis electrostatic electrodes formed in every column by spacing the plurality of electrostatic electrodes at a predetermined distance and a plurality of second axis electrostatic electrodes formed so as to be adjacent to each of the first axis electrostatic electrodes of a longitudinal direction; forming a photosensitive material made of an insulation material on an upper surface of the touch panel, and removing and opening, at a layer formed from a transparent photosensitive material, regions in which one-sided end parts of each of the first axis electrostatic electrodes which are formed in a widthwise direction by extending up to a partial position of a flexible printed circuit board (FPCB) bonding region coupled with a FPCB are located; and forming a metal layer on the upper surface of the touch panel, and horizontally connecting, into one, the regions in which the one-sided end parts of each of the first axis electrostatic electrodes formed in the widthwise direction are located by selectively removing the metal layer, so as to form a first metal conducting wire of the metal layer by binding, into one, metal electrode parts coupled to an FPCB and the one-sided end parts of each of the first axis electrostatic electrodes.

Description

Touch panel and manufacturing method for implementing a touch sensor using a single film

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a touch panel, and in particular, a plurality of electrode terminals are formed in an FPCB bonding region in which a driving electrode and a sensing electrode are formed on an ITO film, and are combined with a flexible printed circuit board (FPCB). The present invention relates to a touch panel and a manufacturing method for implementing a touch sensor using a single piece of film to reduce the number of pads by tying.

In general, the touch panel is an input device that can be easily used by anyone by interactively and intuitively operating a computer or the like by touching a button with a finger.

Such a touch panel has a resistive method, a capacitive method, an infrared method, an ultrasonic method, and the like, depending on a method of sensing a touch, and a resistive method is currently used, but it is advantageous for durability and light and simple characteristics in the future. The use of capacitive methods will be increased.

Such a capacitive touch panel, especially a touch screen, has a structure of indium tin oxide (ITO) made of a transparent conductor on a transparent insulator film such as polyethylene terephthalate (PET) or glass, and a silver paste on the edge of the ITO. Pads made of lead wires are laminated up and down by adding an adhesive layer or an insulator layer.

Here, ITO is composed of X-axis ITO having X-axis electrostatic electrodes formed at equal intervals and Y-axis ITO having Y-axis electrostatic electrodes formed at equal intervals so as to be stacked.

The touch screen formed as above is a controller that receives a touch signal according to a user's touch and outputs a coordinate signal.

As described above, the electrostatic electrodes arranged side by side on the X axis or the Y axis are arranged at different distances from the lead wire. Since different electrostatic electrodes are disposed between them, each electrostatic electrode has different electrical characteristics when viewed from the part where the lead wire is connected.

Hereinafter, the prior art of such a touch panel will be described with reference to FIGS. 1 to 4.

1 is a view showing an X-axis electrode pattern in a conventional capacitive touch panel, Figure 2 is a view showing a Y-axis electrode pattern in a conventional capacitive touch panel, Figure 3 is a conventional capacitive touch panel 4 is a view illustrating a state in which the X-axis electrode pattern and the Y-axis electrode pattern are coalesced, and FIG. 4 is a view illustrating a layer structure in a state in which the X-axis electrode pattern and the Y-axis electrode pattern are coalesced in a conventional capacitive touch panel. to be.

FIG. 1 is a diagram illustrating a conventional bottom pattern layer, and shows an X-axis electrode pattern, and FIG. 2 is a diagram illustrating a conventional top pattern layer, and a Y-axis electrode pattern.

A bottom pattern having an X-axis electrostatic electrode 10 and a top pattern having a Y-axis electrostatic electrode 20 as shown in FIGS. 1 and 2 are respectively fabricated and laminated between layers, and then a window is attached to the touch panel. To prepare. The touch panel completed by this manufacturing process is shown in FIG. 3.

Referring to FIG. 3, a conventional capacitive touch panel includes a bottom pattern having an X-axis electrostatic electrode 10 as a driving electrode and a top pattern having a Y-axis electrostatic electrode 20 as a sensing electrode. It is formed evenly on the upper surface of the

connection electrodes

30, 40 on one side.

The layer structure of the conventional capacitive touch panel is shown in FIG. 4.

Referring to FIG. 4, in the related art, two ITO films used for the top pattern and the bottom pattern were required because the top pattern and the bottom pattern were manufactured.

In addition, the OCA must be added to the top of the ITO film essentially, two ITO films were used, so two OCAs were required.

Accordingly, the conventional touch panel has a disadvantage in that it is expensive because two sheets of ITO film and OCA are used to make one touch panel product.

In the conventional touch panel, since two layers are used as the transmitting electrode and the receiving electrode, it is difficult to reduce the thickness, high raw material cost and high processing cost, and poor transmittance.

In the conventional touch panel, when the top pattern layer and the bottom pattern layer are laminated, the defect rate is measured for each pattern layer because the sheet by sheet method is used instead of the cell by cell method. Yield was not good by In particular, it is difficult to meet the alignment tolerance when laminating each floor, the yield is not good, and tight tolerance management has a disadvantage.

Therefore, the development of the structure of the capacitive touch panel that can solve this problem is required.

In order to solve this problem, the present invention forms a drive electrode and a sensing electrode on a sheet of ITO film, and a method of tying a plurality of electrode terminals together in an FPCB bonding region combined with a flexible printed circuit board (FPCB). It is an object of the present invention to provide a touch panel and a manufacturing method for implementing a touch sensor using a single film to reduce the number of pads.

In order to achieve the above object, the manufacturing method of the touch panel according to the characteristics of the present invention,

A first axis electrostatic electrode corresponding to the window area of the touch panel and spaced apart in a horizontal direction at intervals of a predetermined distance to form a plurality of electrostatic electrodes; Forming a plurality of second axis electrostatic electrodes formed to be adjacent to each first axis electrostatic electrode as a transparent conductive layer;

A photosensitive material of an insulating material is formed on the upper surface of the touch panel, and a layer formed of a transparent photosensitive material extends to a part of the FPCB bonding region coupled with the flexible printed circuit board (FPCB) to form a horizontal direction. Removing and opening an area where one end portion of each first axis electrostatic electrode is located; And

A metal layer is formed on the upper surface of the touch panel, and the metal layer is selectively removed to connect one end portion of each of the first axis electrostatic electrodes formed in the horizontal direction to one area in the horizontal direction, thereby connecting one side of each first axis electrostatic electrode. Forming a first metal lead of the metal layer by tying one end to a metal electrode portion coupled to the FPCB.

According to an aspect of the present invention, a touch panel corresponds to a window area of a touch panel and is spaced apart in a horizontal direction at intervals of a predetermined distance to form a plurality of electrostatic electrodes, and a plurality of electrostatic electrodes are formed for each column by a predetermined distance. A transparent conductive layer representing the axial electrostatic electrode and a plurality of second axial electrostatic electrodes formed to be adjacent to each of the first axial electrostatic electrodes in the longitudinal direction;

One end portion of each of the first axis electrostatic electrodes formed in the upper surface of the touch panel and extending in a horizontal direction to a part of the FPCB bonding region coupled to the flexible printed circuit board (FPCB) is positioned. A photosensitive material of an insulating material having an open area; And

By connecting one area where one end of each first axis electrostatic electrode formed in the horizontal direction is located in one horizontal direction, one end of each first axis electrostatic electrode and a metal electrode portion coupled to the FPCB are bundled together as a first metal lead. It includes a metal layer to form.

By the above-described configuration, the present invention can reduce the thickness by manufacturing a touch sensor formed with a drive electrode and a sensing electrode on one sheet of ITO film, there is an effect that can reduce the raw material cost and process cost.

The present invention can implement a narrow bezel (Bezel) has the effect of forming a wide window area that is a user's touch area.

According to the present invention, sharpness is excellent after forming an electrode trace based on a photolithography method.

The present invention has the effect of reducing the number of pads (Pad) by insulating and opening the jumping connection region for connecting the electrode terminal, and then bundling the jumping connection region by screen printing silver paste.

According to the present invention, the metal layer is thinly formed to a thickness of 0.2 μm or less by a metal sputtering process, thereby reducing bubbles when laminating with glass by OCA, thereby securing high yield.

1 is a view showing an X-axis electrode pattern in a conventional capacitive touch panel.

2 illustrates a Y-axis electrode pattern in a conventional capacitive touch panel.

3 is a view illustrating a state in which an X-axis electrode pattern and a Y-axis electrode pattern are coalesced in a conventional capacitive touch panel.

4 is a diagram illustrating a layer structure in a state in which an X-axis electrode pattern and a Y-axis electrode pattern are combined in a conventional capacitive touch panel.

5 to 7 are diagrams illustrating a method of manufacturing a touch panel implementing a touch sensor using a single film according to an embodiment of the present invention in a layer structure on the side.

FIG. 8 is a plan view showing a top view of a touch panel implementing a touch sensor using a single film according to an embodiment of the present invention. FIG.

FIG. 9 is a view schematically illustrating a touch panel implementing a touch sensor using a single film according to an embodiment of the present invention.

FIG. 10 is a diagram illustrating an example of a metal lead connected to each X-axis electrostatic electrode and one end thereof in a touch panel according to an exemplary embodiment of the present invention.

FIG. 11 is a diagram illustrating an example of a metal lead connected to each Y-axis electrostatic electrode and one end thereof in a touch panel according to an exemplary embodiment of the present invention.

12 is a view showing an example in which a transparent conductive layer according to another embodiment of the present invention is formed of a transparent conductive photosensitive film.

13 is a view showing an example in which a transparent conductive layer is formed of a conductive polymer according to another embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In the mutual capacitance method of the touch panel, when a driving voltage is applied to the driving electrode, a mutual cap is formed between the driving electrode and the sensing electrode, and the sensing electrode senses a change in the voltage value of the mutual cap to detect whether or not the touch is performed. The touch position is detected.

The sensing electrodes Receive and Rx detect whether the touch panel is touched and the touch position as a change in the voltage value, and the driving voltages of the touch electrodes Transfer and Tx are applied.

5 to 7 are diagrams showing a method of manufacturing a touch panel implementing a touch sensor using a single film according to an embodiment of the present invention in a layer structure on the side, and FIG. 8 is a view according to an embodiment of the present invention. 9 is a plan view illustrating a touch panel implementing a touch sensor using a sheet of film, and FIG. 9 is a view schematically illustrating a touch panel implementing a touch sensor using a sheet of film according to an embodiment of the present invention. 10 is a view showing an example of each of the X-axis electrostatic electrode and the metal conductor connected to one end thereof in the touch panel according to an embodiment of the present invention, Figure 11 is a respective Y axis in the touch panel according to an embodiment of the present invention 2 is a diagram illustrating an example of a metal conductive wire connected to an electrostatic electrode and one end thereof.

As shown in (a) of FIG. 5, in the method of manufacturing a touch panel according to the embodiment of the present invention, an index matching layer (Index-Matching) 112 is formed on the upper surface of the insulator layer 110, and thereon. The transparent conductive layer 120 is formed. Here, the insulator layer 110 is formed of an organic insulator or an inorganic insulator of a transparent material, and the organic insulator is polyimide or polyethylene terephthalate (PET), polyethylenenaphthalate (PEN), polycarbonate, PC), acrylic plastic material, and the inorganic insulator is made of glass material and optically treated glass material.

Index-Matching (112) is a coating to form an insulating film layer using an insulating material having a difference in refractive index with the transparent conductive layer 120, and to treat the presence or absence of ITO after the ITO (120) pattern to be,

The index matching layer 112 forms a pattern on the transparent conductive layer 120 and improves visibility due to the difference in reflectance between the portions with and without the transparent conductive layer 120.

When the pattern is formed on the transparent conductive layer 120, the index matching layer 112 is an insulating layer having a refractive index that can improve the visibility of the circuit of the transparent conductive layer 120.

The index matching layer 112 means that the lower layer of the ITO 120 is optically treated so that the portion of the ITO and the portion of the non-existent ITO film are not detected by the eye when the capacitive ITO film is manufactured.

The index matching layer 112 may raise SiO ₂ , TiO _2, Ceo _2, or the like by a dry method (deposition), or may perform a chemical treatment by a wet method.

The index matching layer 112 may have an insulating layer such as SiO ₂ , TiO _2, Ceo _{2, or} Nb ₂ O ₅ having a refractive index capable of compensating for the height of the transparent conductive layer 120 in a single or multiple layer structure. Form.

A transparent conductive layer 120 is a transparent conductive oxide (Transparent Conducting Oxide, TCO) and formed of a conductive material of transparent material, such as, specifically, including ITO or IZO (Indium Zinc Oxide) or ITO, IZO, SnO _2, AZO It is formed of a transparent conductive material.

In addition, the transparent conductive layer 120 is a transparent conductive photosensitive film, a conductive polymer, carbon nanotubes (CNT), graphene (Graphene), conductive polymers, silver nanowires (AGNW), Hybrid AGNW ( CNT + AGNW), hybrid graphene (AGNW + graphene) and the like can be formed of a transparent conductive material.

The transparent conductive layer (ITO film, etc.) 120 of the present invention includes an index matching layer (insulation layer) 112 on the bottom surface.

Next, as shown in (b), (c), (d) of Figure 5, the present invention forms a first photosensitive material 140 on the upper surface of the transparent conductive layer 120, the pattern is formed When UV irradiation is performed using the first artwork film 142, a pattern is formed on the first photosensitive material 140 (exposure), and an open pattern is formed on the first photosensitive material 140 using a weak alkali solution. (phenomenon).

Although the present invention illustrates the first artwork film 142 in which the pattern is formed, the present invention is not limited thereto, and any pattern tool may be used, and using the equipment for directly implementing the pattern without the pattern tool. An exposure process may also be performed.

In addition, the process of forming the first photosensitive material 140 is formed by coating a liquid photoresist or laminating a dry film. In addition, in the case of using a liquid type silicon or epoxy material, a coating process may be used, and in the case of using an insulating material of SiO ₂ or TiO ₂ , a deposition process may be used.

Next, as shown in FIGS. 6E and 6F, the present invention selectively etches the transparent conductive layer 120 using an acidic chemical to the first photosensitive material 140 having an open pattern. The first photosensitive material 140 is removed using a strong alkali chemical to form the electrostatic electrode pattern 121 (etching process, peeling process). 6 (e) and 6 (f) are subjected to laminating, exposure, development, etching, and peeling by a process of photolithography.

The electrostatic electrode pattern 121 is a portion corresponding to the window area (the area where the screen is displayed) of the touch panel, and represents a pattern representing a plurality of electrostatic electrodes formed spaced at intervals of a predetermined distance, and represents a user's touch pattern area.

The electrostatic electrode pattern 121 includes a plurality of X-axis electrostatic electrodes 122 and respective Y-axis electrostatic electrodes 124 which are adjacently surrounded by the respective X-axis electrostatic electrodes 122.

The plurality of X-axis electrostatic electrodes 122 represent a plurality of driving electrodes Transfer and Tx, and the plurality of Y-axis electrostatic electrodes 124 include sensing electrodes Receive and Rx surrounding each driving electrode.

As illustrated in FIGS. 8, 9, and 10, the plurality of X-axis electrostatic electrodes 122 are spaced apart in the horizontal direction at intervals of a predetermined distance in the window area of the touch panel to form a plurality of electrostatic electrodes, and the plurality of electrostatics The electrodes are formed at intervals of a certain distance apart.

As shown in FIGS. 8, 9, and 11, the plurality of Y-axis electrostatic electrodes 124 are a plurality of electrostatic electrodes that are adjacently surrounded by the respective X-axis electrostatic electrodes 122 in the vertical direction, and the plurality of electrostatics The electrodes are formed in rows by spaced distances.

The plurality of X-axis electrostatic electrodes 122 extend from one side of each X-axis electrostatic electrode formed in the horizontal direction to a part of the FPCB bonding region 200, respectively.

The plurality of Y-axis electrostatic electrodes 124 extends to a part of the FPCB bonding region 200 by connecting each of the Y-axis electrostatic electrodes formed in the vertical direction to one.

The FPCB bonding region 200 is an edge region excluding the window region of the touch panel, and includes a metal electrode portion coupled to a flexible printed circuit board (FPCB) and a region except the window region touched by the user.

Next, as illustrated in FIG. 6G, after forming the electrostatic electrode pattern 121 made of the transparent conductive layer 120, the transparent photosensitive material of transparent material is formed on the upper surface of the touch panel. 150) (laminating, coating or deposition process). Here, the transparent photosensitive material 150 may include a transparent dry film as an example of a photosensitive transparent insulating material.

In the case of using the transparent photosensitive material 150, it can be left in the transparent window area, it is possible to prevent a defect such as scratches in the post-process.

If an opaque general dry film, a liquid photoresist, or the like is used, the process of removing the photosensitive material in the portion of the window region by the photolithography exposure and development process, leaving the photosensitive material in the FPCB bonding region 200. Additionally.

Hereinafter, for convenience of description, the transparent photosensitive material 150 is used as an insulating material.

Next, as shown in (h) and (i) of FIG. 7, the present invention forms a second artwork film 152 on the upper surface of the transparent photosensitive material 150, and the photolithography exposure and development process By selectively removing the jumping connection region 160 in the layer of the transparent photosensitive material 150 of the touch panel to open.

The jumping connection region 160 extends from a layer formed of the transparent photosensitive material 150 to a part of the FPCB bonding region 200 so that one end portion of each X-axis electrostatic electrode 122 formed in the horizontal direction is located. Indicates.

The jumping connection region 160 extends from a layer formed of the transparent photosensitive material 150 to a part of the FPCB bonding region 200 and is located at one end portion of each of the Y-axis electrostatic electrodes 124 formed in the vertical direction. Indicates.

In more detail, in the present invention, when UV irradiation is performed using the second artwork film 152 having the pattern for opening the jumping connection region 160, a pattern is formed on the transparent photosensitive material 150 (exposure). , Using the weak alkaline solution to form a pattern for opening the jumping connection region 160 in the transparent photosensitive material 150 (development).

Here, the pattern of opening the jumping connection region 160 to the transparent photosensitive material 150 is a jump of the touch panel in the layer made of the transparent photosensitive material 150 formed on the upper surface of the touch panel as shown in FIG. The pattern corresponding to the connection region 160 is an open pattern.

The present invention illustrates the patterned second artwork film 152, but is not limited thereto, and any pattern tool having a pattern for opening the jumping connection region 160 may be used. An exposure process may be performed using equipment that implements a pattern.

Next, as shown in (j) (k) of Figure 7, the present invention forms a metal layer 130 on the upper surface of the touch panel. Circuit formation of the metal layer 130 is deposited by a metal sputter (Metal Sputter) to form a pattern using a process of photolithography.

The metal layer 130 may be formed of Cu, Cu alloy, Ag, Ag alloy, Ni + Cr, Ni + Ni alloy, Mo / Ag, Mo / Al / Mo, Ni + Cr / Cu / Ni + Cr, Ni alloy / Cu, Ni Alloy / Cu / Ni alloy, Mo / APC, Cu / Ni + Cu + Ti, Ni + Cu + Ti / Cu / Ni + Cu + Ti, carbon and all conductive materials are included.

For example, the metal layer 130 may be formed of a silver paste, or various methods may be used, such as depositing copper.

The metal layer 130 may use various metals and is preferably copper or aluminum in consideration of ease of manufacture and electrical conductivity.

Subsequently, in the present invention, the jumping connection region 160, which is an area where one end of each of the X-axis electrostatic electrodes 122 formed in the horizontal direction by selectively removing the metal layer 130 by the photolithography process, is positioned in the horizontal direction. The first metal lead wire 132 is formed by connecting to one end and tying together one end of each X-axis electrostatic electrode 122 and the metal electrode part coupled to the FPCB (FIGS. 8, 9, and 10).

In addition, according to an embodiment of the present invention, the metal layer 130 is selectively removed by the photolithography process, and the metal electrode portion coupled to the FPCB from one end of the Y-axis electrostatic electrode 124 extending to a part of the FPCB bonding region 200. The second metal lead wire 134 is formed (FIGS. 8, 9, and 11). Here, lamination, exposure, development, etching, and peeling are performed by a process of photolithography.

As shown in FIG. 10, each of the first metal conductors 132 is connected to the metal electrode portion to which the FPCB is coupled by tying one end portion of each X-axis electrostatic electrode 122 formed in the horizontal direction in one horizontal direction. do.

As shown in FIG. 11, each second metal lead 134 is connected from one end portion of each of the Y-axis electrostatic electrodes 124 formed in the vertical direction to the metal electrode portion to which the FPCB is coupled.

In another embodiment, the present invention forms an open pattern on the first photosensitive material 140, and then screen-prints the silver paste using the ink for silk screen printing or applies the silver paste to the exposure and development process of photolithography. By using photosensitive silver paste printing, the number of pads is reduced by bonding the electrode terminals (the first metal lead 132 and the second metal lead 134) into one.

The transparent conductive layer 120 of the present invention may be composed of transparent conductive

photosensitive films

170 and 172. The transparent conductive

photosensitive films

170 and 172 include a transparent photosensitive resin layer 172 and a transparent conductive material 170 stacked thereon.

The transparent conductive material 170 is a conductive and photosensitive transparent material, carbon nanotubes (CNT), graphene, conductive polymers, silver nanowires (AGNW), hybrid AGNW ( CNT + AGNW), formed of a transparent conductive material composed of hybrid graphene (AGNW + graphene) and the like, and conductive polymer, Cu, Cu alloy, Ag, Ag alloy, Ni + Cr, Ni + Ni alloy, Mo / Ag, Mo / Al / Mo, Ni + Cr / Cu / Ni + Cr, Ni alloy / Cu, Ni alloy / Cu / Ni alloy, Mo / APC, Cu / Ni + Cu + Ti, Ni + Cu + Ti / Cu / Ni + The concept includes all conductive materials such as Cu + Ti, carbon, and transparent conducting oxide (TCO).

The present invention selectively removes the transparent photosensitive resin layer 172 and the transparent conductive material 170 stacked thereon from a layer formed of the transparent conductive

photosensitive films

170 and 172 by photolithography exposure and development processes. An X-axis electrostatic electrode 122 and a plurality of Y-axis electrostatic electrodes 124 are formed.

In more detail, in the present invention, when UV irradiation is performed using the patterned first artwork film 142, a pattern is formed on the transparent conductive photosensitive films 170 and 172 (exposure), and a weak alkaline solution is used. To form an open pattern on the transparent conductive photosensitive films 170 and 172 (developing). Here, the open pattern formed on the transparent conductive photosensitive film 160 represents the electrostatic electrode pattern 121 including the plurality of X-axis electrostatic electrodes 122 and the plurality of Y-axis electrostatic electrodes 124.

After the transparent conductive

photosensitive films

170 and 172 are formed on the upper surface of the insulator layer 110, the electrostatic electrode pattern 121 is formed by an exposure and development process of photolithography. After that, since the electrode forming procedure is performed in the same manner as the electrode forming procedure of FIGS. 6G to 7K, detailed descriptions thereof will be omitted.

The transparent conductive layer 120 of the present invention may be made of a conductive polymer.

The conductive polymer may be polythiophene-based, polypyrrole-based, polyaniline-based, polyacetylene-based, polyphenylene-based, or the like, and is particularly preferred among the polythiophene-based PEDOT / PSS compounds. One or more of the compounds may be mixed and used.

In addition, when the carbon nanotubes and the like are further mixed with the organic compound, the conductivity may be increased.

The conductive polymer maintains conductivity by the structure of the double bond benzene ring.

The conductive polymer can be removed by the wet process, the wet process can be removed by boiling the structure of the double bond benzene ring by reacting with the etchant (180) as shown in Figure 8 to make a single bond. have.

In this way, when the conductive polymer is made of the non-conductive polymer 190, the polymer layer is maintained as it is, but the conductivity is lost, and the conductivity does not return to the original state because it is not restored to the double bond again without a special catalyst.

After the conductive polymer is formed on the upper surface of the insulator layer 110, the electrostatic electrode pattern 121 including the plurality of X-axis electrostatic electrodes 122 and the plurality of Y-axis electrostatic electrodes 124 may be formed by a wet process. It maintains the conductivity of the conductive polymer, and loses the conductivity of the conductive polymer in the region other than the touch pattern to make a non-conductive polymer 190 (conductive polymer patterning process). After that, since the electrode forming procedure is performed in the same manner as the electrode forming procedure of FIGS. 6G to 7K, detailed descriptions thereof will be omitted.

The present invention covers the FPCB bonding region 200 with a conductive polymer to prevent corrosion of the oxidation generating region, to prevent the problem of metal cracking by external pressure, and to perform a buffering function during FPCB bonding, and a separate sealing and water repellent coating process Omitted to reduce process costs.

The present invention has excellent visibility in terms of visibility by implementing a touch sensor by using the characteristics of the conductive polymer, and thus an index matching layer process is unnecessary.

The present invention has advantages in terms of productivity and cost because the coating speed of the conductive polymer is superior to that of ITO or metal deposition.

The embodiments of the present invention described above are not implemented only by the apparatus and / or method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention, a recording medium on which the program is recorded, and the like. Such implementations may be readily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

[Description of the code]

110: insulator layer

112: index matching layer

120: transparent conductive layer

121: electrostatic electrode pattern

122: X-axis electrostatic electrode

124: Y-axis electrostatic electrode

130: metal layer

132: first metal lead

134: second metal lead

140: first photosensitive material

142: first artwork film

150: transparent photosensitive material

152: second artwork film

160: jumping connection area

170: transparent conductive material

172: transparent photosensitive resin layer

180: corrosion solution

190: non-conductive polymer

200: FPCB bonding area

Claims

In the manufacturing method of a touch panel,

A first axis electrostatic electrode corresponding to the window area of the touch panel and spaced apart in a horizontal direction at intervals of a predetermined distance to form a plurality of electrostatic electrodes; Forming a plurality of second axis electrostatic electrodes formed to be adjacent to each of the first axis electrostatic electrodes of a transparent conductive layer;

A photosensitive material of an insulating material is formed on the upper surface of the touch panel, and extends from the layer formed of the photosensitive material to a part of the FPCB bonding region coupled with the flexible printed circuit board (FPCB) in the horizontal direction. Removing and opening a region where one end portion of each of the first axis electrostatic electrodes formed is located; And

A metal layer is formed on the upper surface of the touch panel, and the metal layer is selectively removed to connect the regions where one end of each of the first axis electrostatic electrodes formed in the horizontal direction are located in a horizontal direction to each one of the first axes. Forming a first metal lead of the metal layer by tying one end of the electrostatic electrode and a metal electrode portion coupled to the FPCB to one;

Method of manufacturing a touch panel comprising a.
The method of claim 1,

Removing and opening an area where one end portion of each of the first axis electrostatic electrodes is located may include:

Removing and opening a region where one end portion of the second axis electrostatic electrode formed in the longitudinal direction is extended to a part of the FPCB bonding region

Method of manufacturing a touch panel comprising a.
The method of claim 1,

Forming the first metal lead of the metal layer,

Forming a second metal lead of the metal layer up to one end portion of the second axis electrostatic electrode extending to a portion of the FPCB bonding region and the metal electrode portion coupled to the FPCB;

Method of manufacturing a touch panel comprising a.
The method of claim 1,

Forming the transparent conductive layer,

Each of the first axis electrostatic electrodes formed in the horizontal direction extends from one side to a part of the FPCB bonding area, and the second axis electrostatic electrodes formed in the longitudinal direction are connected to each other to form the FPCB bonding area. Extending to some position

Method of manufacturing a touch panel comprising a.
The method of claim 1,

Forming the transparent conductive layer,

A driving electrode (Transfer, Tx) to which the driving voltage of the touch panel is applied to one transparent conductive layer detects each of the first axis electrostatic electrode, whether the touch panel is touched, and the touch position by changing the voltage value. A method of manufacturing a touch panel in which each of the second axis electrostatic electrodes is formed simultaneously with a sensing electrode (Receive, Rx).
The method of claim 1,

Forming the transparent conductive layer,

Forming a layer made of a conductive polymer on an upper surface of the touch panel; And

The conductivity of the plurality of first axis electrostatic electrodes and the plurality of second axis electrostatic electrodes in a layer formed of the conductive polymer by a wet process of reacting with a corrosion solution to remove the conductivity by boiling a structure of a double bond benzene ring to form a single bond. Maintaining the conductivity of the polymer and losing the conductivity of the conductive polymer in the portion not corresponding to each of the first and second axial electrostatic electrodes, thereby making it a non-conductive polymer.

Method of manufacturing a touch panel comprising a.
The method of claim 1,

Forming the transparent conductive layer,

Forming a transparent photosensitive resin layer formed of a transparent insulating material on an upper surface of the touch panel, and a transparent conductive photosensitive film made of a transparent conductive material of a transparent material having a conductivity and photosensitive property laminated thereon; And

Selectively removing the transparent conductive photosensitive film from the layer formed of the transparent conductive photosensitive film by a photolithography exposure and developing process to form the plurality of first and second axial electrostatic electrodes

Method of manufacturing a touch panel comprising a.
In the touch panel,

A first axis electrostatic electrode corresponding to the window area of the touch panel and spaced apart in a horizontal direction at intervals of a predetermined distance to form a plurality of electrostatic electrodes, and formed in rows by spaced apart from the plurality of electrostatic electrodes at a predetermined distance; A transparent conductive layer representing a plurality of second axis electrostatic electrodes formed so as to be adjacent to each of the first axis electrostatic electrodes of;

One end portion of each of the first axis electrostatic electrodes formed in the horizontal direction by being formed on the upper surface of the touch panel and extending to a portion of the FPCB bonding region coupled to the flexible printed circuit board (FPCB). A photosensitive material of an insulating material having an open area in which it is located; And

A region in which one end of each of the first axis electrostatic electrodes formed in the horizontal direction is located as one in the horizontal direction is tied to one end of each of the first axis electrostatic electrodes and a metal electrode portion coupled to the FPCB. Metal layer formed by metal lead

Touch panel comprising a.
The method of claim 8,

The transparent conductive layer extends from one side of each of the first axis electrostatic electrodes formed in the horizontal direction to a part of the FPCB bonding region, and connects the second axis electrostatic electrodes formed in the longitudinal direction to one. A touch panel extending to a portion of the FPCB bonding region.
The method of claim 8,

The photosensitive material extends to a part of the FPCB bonding region and opens a region where one end portion of the second axis electrostatic electrode formed in the longitudinal direction is opened.
The method of claim 8,

And the metal layer is formed of a second metal lead from one end portion of the second axis electrostatic electrode extending to a part of the FPCB bonding region and a metal electrode portion coupled to the FPCB.
The method of claim 8,

And each of the second axis electrostatic electrodes surrounds each of the first axis electrostatic electrodes.
The method of claim 8,

The transparent conductive layer is a driving electrode (Transfer, Tx) applied by the driving voltage of the touch panel to sense each of the first axis electrostatic electrode, whether the touch panel is touched, and a touch position by a change in voltage value. A touch panel for forming the second axis electrostatic electrode in one sheet at the same time with an electrode (Receive, Rx).
The method of claim 8,

The transparent conductive layer may be formed of a transparent conductive oxide (TCO), a conductive polymer, a carbon nanotube (CNT), a graphene, a conductive polymer, and a silver nanowire. Nanowires, AGNW), a touch panel material of one of the transparent conductive photosensitive film.
The method of claim 8,

The transparent conductive layer is a transparent conductive photosensitive film made of a transparent photosensitive resin layer made of a transparent insulating material, and a transparent conductive material of a transparent material having a conductive property and photosensitive laminated thereon, the transparent by photolithography exposure and development process And selectively removing the transparent conductive photosensitive film from the layer formed of the conductive photosensitive film to form the plurality of first axis electrostatic electrodes and the plurality of second axis electrostatic electrodes.
The method of claim 8,

When the transparent conductive layer is a conductive polymer, the conductive polymer maintains the conductivity of the conductive polymers of the plurality of first axis electrostatic electrodes and the plurality of second axis electrostatic electrodes, and loses the conductivity of the conductive polymers in the remaining areas. Making touch panel.