WO2015034291A1

WO2015034291A1 - Touch panel using transparent conductive photosensitive film and method for manufacturing same

Info

Publication number: WO2015034291A1
Application number: PCT/KR2014/008329
Authority: WO
Inventors: 박준영; 정주현; 송영진; 노수천; 서초란; 한원희; 이성림; 허용; 장성욱
Original assignee: 주식회사 티메이
Priority date: 2013-09-06
Filing date: 2014-09-04
Publication date: 2015-03-12
Also published as: KR101496246B1

Abstract

A method for manufacturing a touch panel comprises the steps of: forming a plurality of first-axis electrostatic electrodes, which are formed on a window area of a touch panel and formed to be separated at a uniform distance, by selectively removing a transparent conductive layer, and forming a plurality of metal conducting wires, which are formed on an edge area of the touch panel connected to one end of each of the first-axis electrostatic electrodes, by selectively removing a metal layer; and forming a transparent conductive photosensitive film made from a transparent material on the upper surface of the touch panel, and then selectively removing the transparent conductive photosensitive film from a layer comprising the transparent conductive photosensitive film, to form second-axis electrostatic electrodes which are separated at a specific distance away from and which cross each of the first electrostatic electrodes, and forming a wiring electrode which is formed on an edge area of the touch panel connected to one end of each of the second-axis electrostatic electrodes.

Description

Touch panel and manufacturing method using transparent conductive photosensitive film

The present invention relates to a manufacturing method of a touch panel, and in particular, a touch panel using a transparent conductive photosensitive film to implement a touch sensor and a touch panel and a manufacturing method of laminating a bottom electrode and a top electrode without using an adhesive layer. It is about.

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.

The capacitive touch panel, particularly the touch screen, has an 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. A pad made of a lead wire is 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, a conventional technology of such a touch panel will be described with reference to FIG. 1.

1 is a view showing a state in which a bottom electrode of an X-axis capacitive electrode and a top electrode of a Y-axis capacitive electrode are laminated in a conventional capacitive touch panel.

In the conventional capacitive touch panel, the bottom electrode 10 having the X-axis capacitive electrode and the top electrode 20 having the Y-axis capacitive electrode are manufactured, respectively, and then laminated using the OCA (Optical Clear Adhesive) 30. Then, a window is attached to manufacture a touch panel.

The bottom electrode 10 and the top electrode 20 form a plurality of electrostatic electrodes on the upper surface of the insulator layer 40 as ITO 50 and are connected to one end of each electrostatic electrode to exclude the window area of the touch panel. The wiring electrode representing the metal lead in the edge region is formed of the metal layer 60.

Since the conventional capacitive touch panel manufactures the bottom electrode 10 and the top electrode 20, respectively, two ITO films used for the bottom electrode 10 and the top electrode 20 were required.

When the bottom electrode 10 and the top electrode 20 are laminated, an optical clear adhesive (OCA) 30 is essentially added. Accordingly, the conventional touch panel has a disadvantage in that it is expensive because two sheets of ITO film and OCA 30 are used to make one touch panel product.

In the conventional touch panel, since the ITO and the metal deposition process must be implemented when the bottom electrode 10 and the top electrode 20 are manufactured, high cost of raw materials and a complicated process are complicated.

In order to solve this problem, the present invention provides a touch panel and a manufacturing method for laminating a bottom electrode and a top electrode without using an adhesive layer by implementing a touch sensor using a transparent conductive photosensitive film. Its purpose is to.

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

A plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance are formed by selectively removing the transparent conductive layer and connected to one end of each first axis electrostatic electrode. Selectively removing the metal layer by forming a plurality of metal conductors which are edge regions of the metal layer; And

After forming a transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, and selectively removes the transparent conductive photosensitive film from the layer formed of the transparent conductive photosensitive film, each of which is spaced apart from each of the first axis electrostatic electrode by a predetermined distance And forming a second electrode of the touch electrode that is an edge region of the touch panel connected to one end of each of the second axis electrostatic electrodes.

Method for manufacturing a touch panel according to a feature of the invention,

Selectively removing the transparent conductive layer from the plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance;

After forming a transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, and selectively removes the transparent conductive photosensitive film from the layer formed of the transparent conductive photosensitive film, each of which is spaced apart from each of the first axis electrostatic electrode by a predetermined distance Forming a second axis electrostatic electrode; And

After the metal layer is formed on the upper surface of the touch panel, a plurality of first metal conductors, which are edge regions of the touch panel connected to one end of each first axis electrostatic electrode by selectively removing the metal layer, and each second And simultaneously forming a plurality of second metal conductors, which are edge regions of the touch panel, connected to one end of the axis electrostatic electrode.

Method for manufacturing a touch panel according to a feature of the invention,

A plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance, and a plurality of metal conductors that are edge regions of the touch panel connected to one end of each first axis electrostatic electrode; Forming a metal mesh structure having a fine pattern including one metal layer; And

Method for manufacturing a touch panel according to a feature of the invention,

Selectively removing the first transparent conductive photosensitive film of a transparent material from a plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance;

After forming the second transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, each of the second shaft electrostatic capacities crossing a predetermined distance from each of the first axis electrostatic electrode in the layer formed of the second transparent conductive photosensitive film Forming an electrode by selectively removing the second transparent conductive photosensitive film; And

Touch panel according to a feature of the invention,

An insulator layer formed of an organic insulator or an inorganic insulator, a transparent conductive layer formed on an upper surface of the insulator layer and corresponding to the window region of the touch panel and forming a plurality of first axis electrostatic electrodes spaced at intervals of a predetermined distance; A bottom electrode forming a plurality of metal conductors, which are edge regions of the touch panel, connected to one end of the plurality of first axis electrostatic electrodes; And

A transparent conductive photosensitive film made of a transparent material is used as a wiring electrode, which is an edge region of each touch panel connected to one end of each of the second axis electrostatic electrode and the second axis electrostatic electrode, which intersects with each of the first axis electrostatic electrodes at a predetermined distance. The transparent conductive photosensitive film includes a top electrode formed of a transparent insulating material, and a transparent photosensitive resin layer made of a transparent insulating material, and a transparent conductive material which is a conductive material of a transparent material stacked thereon, and an upper surface of the bottom electrode. The top electrode is laminated on the transparent photosensitive resin layer.

Touch panel according to a feature of the invention,

An insulator layer formed of an organic insulator or an inorganic insulator, a transparent conductive layer formed on an upper surface of the insulator layer and corresponding to the window region of the touch panel and forming a plurality of first axis electrostatic electrodes spaced at intervals of a predetermined distance; A bottom electrode forming a plurality of first metal conductors, which are edge regions of a touch panel connected to one end of the plurality of first axis electrostatic electrodes; And

A transparent conductive photosensitive film made of a transparent material that corresponds to the window area of the touch panel and forms a respective second axis electrostatic electrode crossing the first axis electrostatic electrode at a predetermined distance from the first axis electrostatic electrode, and one end of the second axis electrostatic electrode A top electrode forming a plurality of second metal conductors, which are edge regions of the touch panel connected to the touch panel, wherein the transparent conductive photosensitive film comprises a transparent photosensitive resin layer made of a transparent insulating material, and a transparent material stacked thereon It is made of a transparent conductive material of the conductive material, and the top electrode on the upper surface of the transparent conductive layer is laminated by a transparent photosensitive resin layer.

Touch panel according to a feature of the invention,

An insulator layer made of an organic insulator or an inorganic insulator, a plurality of first axis electrostatic electrodes formed on an upper surface of the insulator layer, corresponding to the window region of the touch panel, and spaced apart at regular intervals, and each first axis electrostatic A bottom electrode for forming a plurality of metal conductors, which are edge regions of a touch panel connected to one end of the electrode, in a fine pattern metal mesh structure formed of one metal layer; And

Touch panel according to a feature of the invention,

A first transparent conductive photosensitive film made of a transparent material that corresponds to the window area of the touch panel and is spaced apart at intervals of a predetermined distance, and is connected to one end of each first axis electrostatic electrode; A bottom electrode forming a plurality of first metal conductors, which are edge regions of the touch panel; And

A second transparent conductive photosensitive film made of a transparent material corresponding to the window area of the touch panel and forming respective second axis electrostatic electrodes crossing the first axis electrostatic electrodes at a predetermined distance from each other, and each second axis electrostatic A top electrode forming a plurality of second metal conductors, which are edge regions of the touch panel connected to one end of the electrode, wherein the first transparent conductive photosensitive film and the second transparent conductive photosensitive film are made of a transparent insulating material. It is made of a transparent photosensitive resin layer and a transparent conductive material which is a conductive material of a transparent material laminated thereon, the top electrode on the top surface of the bottom electrode is laminated by the transparent photosensitive resin layer of the second transparent conductive photosensitive film.

By the above-described configuration, the present invention has the effect of lowering the raw material cost and the process cost by implementing a touch sensor using a transparent conductive photosensitive film.

The present invention has the effect of slimming the electrode through the use of a transparent conductive photosensitive film of about 5㎛ because OCA is not used because the laminated with the light-transmissive photosensitive resin layer when the bottom electrode and the top electrode is laminated.

The present invention has the effect of improving the productivity by simplifying the manufacturing process of the existing touch panel.

2 to 4 are diagrams showing a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a first embodiment of the present invention with a layer structure in a side view.

5 is a plan view illustrating a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a first embodiment of the present invention.

6 is a perspective view illustrating a touch panel using a transparent conductive photosensitive film according to a first embodiment of the present invention.

7 is a plan view illustrating a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a second embodiment of the present invention.

8 is a view conceptually showing a patterning method of a conductive polymer according to a second embodiment of the present invention.

9 is a diagram illustrating a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a third exemplary embodiment of the present invention in a layer structure from the side.

10 is a plan view illustrating a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a third 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.

2 to 4 are diagrams showing a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a first embodiment of the present invention in a layer structure from the side, and FIG. 5 is a transparent according to the first embodiment of the present invention. 6 is a plan view illustrating a method of manufacturing a touch panel using a conductive photosensitive film, and FIG. 6 is a perspective view illustrating a touch panel using a transparent conductive photosensitive film according to a first embodiment of the present invention.

As shown in FIG. 2A, in the method of manufacturing the touch panel according to the first embodiment of the present invention, an index matching layer 112 is formed on an upper surface of the insulator layer 110. The transparent conductive layer 120 is formed thereon, and the metal layer 130 is formed on the upper surface of the transparent conductive layer 120. 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 then improves the visibility phenomenon 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.

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

The metal layer 130 includes 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 All conductive materials including alloy / Cu / Ni alloy, Mo / APC, Cu / Ni + Cu + Ti, Ni + Cu + Ti / Cu / Ni + Cu + Ti, APC (silver, palladium, copper alloy), carbon It is a concept which is formed by the well-known technique of printing, vapor deposition, paste, and application | coating.

For example, the metal layer 130 may be formed of an Ag paste, or a variety of 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.

The metal layer 130 may be formed by a known method such as laminating, vapor deposition, or coating.

Next, as shown in (b), (c), (d) of Figure 2, the present invention forms a first photosensitive material 140 on the upper surface of the metal layer 130, the first pattern formed UV irradiation using the artwork film 142 forms a pattern on the first photosensitive material 140 (exposure), and forms an open pattern on the first photosensitive material 140 using a weak alkali solution (developing) ).

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.

Subsequently, as shown in FIGS. 3E and 3F, the present invention uses an acidic chemical to the first photosensitive material 140 having an open pattern to form the transparent conductive layer 120 and the metal layer 130. Etching or simultaneous etching is performed, and the first photosensitive material 140 is removed using a strong alkali chemical to form the electrostatic electrode pattern 122 and the wiring electrode pattern 132 (etching process, peeling process). 3 (e) and 3 (f) are subjected to lamination, exposure, development, etching, and peeling by a process of primary photolithography.

The electrostatic electrode pattern 122 is a portion corresponding to the window area (the area where the screen is displayed) of the touch panel, and represents a bar pattern indicating a plurality of electrostatic electrodes formed spaced at a predetermined distance apart, and the user's touch pattern Represents an area.

The electrostatic electrode pattern 122 of the present invention includes a plurality of X-axis electrostatic electrodes 122b and each of the Y-axis electrostatic electrodes 122a crossing at right angles with a predetermined distance from the X-axis electrostatic electrodes 122b. Include.

The wiring electrode pattern 132 is a circuit representing a metal lead of an edge region excluding the window region of the touch panel. The wiring electrode pattern 132 is connected outwardly from one end of each electrostatic electrode to detect the user's touch pattern and leads. It includes a metal electrode portion of the FPCB bonding region connected to one end of the electrode is exposed to the outside and coupled with the flexible printed circuit board (FPCB).

The wiring electrode pattern 132 of the present invention is spaced apart from the wiring electrode pattern 132a connected to one end of each of the Y-axis electrostatic electrodes 122a and the respective Y-axis electrostatic electrodes 122a by a predetermined distance in a right angle direction. A wiring electrode pattern 132b connected to one end of the plurality of intersecting X-axis electrostatic electrodes 122a is formed through selective etching.

Next, as shown in FIGS. 3G and 5A, the present invention provides a metal layer formed on the electrostatic electrode pattern 122 which is a window area of a touch panel by a process of secondary photolithography. 130 is selectively removed to leave the transparent conductive layer 120.

Therefore, as shown in FIG. 5A, the present invention forms a plurality of X-axis electrostatic electrodes 122b corresponding to the window region of the touch panel and spaced apart at intervals of a predetermined distance from the transparent conductive layer 120. A plurality of metal conductors 132b, which are edge regions of the touch panel connected to one end of each of the X-axis electrostatic electrodes 122b, are formed of the metal layer 130.

Here, the process of secondary photolithography is subjected to laminating, exposure, developing, etching, and peeling processes which are the same processes as those of the above-described primary photolithography.

Since the photolithography process is performed through laminating, exposure, development, etching, and peeling processes, redundant description thereof will be omitted.

Next, as shown in FIGS. 4H and 5B, the present invention includes a plurality of X-axis electrostatic electrodes 122b made of a transparent conductive layer 120 and a wiring made of a metal layer 130. After forming the electrode pattern 132b, a transparent conductive photosensitive film 160 of a transparent material is formed on the upper surface of the touch panel (laminating, coating or deposition process). Here, the transparent conductive photosensitive film 160 includes a transparent photosensitive resin layer 162 and a transparent conductive material 164 stacked thereon.

The thickness of the transparent conductive photosensitive film 160 is generally 1-100 μm, preferably 2.5-50 μm, and 2.5-10 μm may be used for mass productivity and cost reduction. That is, the top electrode 200 may be made of a transparent conductive photosensitive film 160, thereby making it possible to slim down the thickness.

The transparent photosensitive resin layer 162 includes a transparent dry film, an organic insulator or an inorganic insulator of a transparent material as a transparent insulating material.

The transparent conductive material 164 is a conductive and photosensitive transparent material, carbon nanotube (CNT), graphene, conductive polymer, 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).

Next, as shown in FIGS. 4 (i), (j) and 5 (c), the present invention is transparent in the layer formed of the transparent conductive photosensitive film 160 by the photolithography exposure and development process. The photosensitive resin layer 162 and the transparent conductive material 164 stacked thereon are selectively removed to connect the plurality of Y-axis

electrostatic electrodes

122a and 164 to one end of each of the Y-axis

electrostatic electrodes

122a and 164. The

wiring electrode patterns

132a and 164 are formed.

In more detail, in the present invention, when UV irradiation is performed using the patterned second artwork film 154, a pattern is formed on the transparent conductive photosensitive film 160 (exposure), and is transparent using a weak alkali solution. A pattern is formed on the conductive photosensitive film 160 (development). Here, the pattern formed on the transparent conductive photosensitive film 160 has a plurality of Y-axis

electrostatic electrodes

122a and 164 and the

wiring electrode patterns

132a and 164 as shown in FIGS. 4 (j) and 5 (c). It means a pattern in which an area not applicable is opened.

Although the present invention illustrates the second artwork film 154 having a pattern, the present invention is not limited thereto. Any pattern tool having a pattern may be used, and any device that directly implements the pattern without the pattern tool may be used. An exposure process may also be performed.

In the present invention, the plurality of X-axis electrostatic electrodes and the Y-axis electrostatic electrodes are formed in a bar pattern, but the present invention is not limited thereto and may be variously applied, such as a square, a circle, a diamond, a polygon, and a random pattern.

As shown in FIG. 6, the bottom electrode 100 forms a plurality of X-axis electrostatic electrodes on the upper surface of the insulator layer 110 as the ITO 120 and is connected to one end of each X-axis electrostatic electrode. The

wiring electrode patterns

132b and 130 of the edge region excluding the window region of the panel are formed of the metal layer 130.

The top electrode 200 includes a plurality of Y-axis

electrostatic electrodes

122a and 164 made of a transparent conductive photosensitive film 160 including a transparent photosensitive resin layer 162 and a transparent conductive material 164 and each of the Y-axis electrostatic electrodes ( The

wiring electrode patterns

132a and 164 connected to one end of the 122a and 164 are formed.

Since the bottom electrode 100 and the top electrode 200 are laminated to the light-transmitting photosensitive resin layer 162 of the top electrode 200, OCA is not used, thereby reducing the OCA processing cost or material cost process, thereby reducing the cost and processing process. This has the effect of being reduced.

The light-transmissive photosensitive resin layer 162 serves as insulation and a contact agent between the top electrode 200 and the bottom electrode 100.

The present invention uses only one sheet of the ITO film and the metal film (bottom electrode 100), and in the case of the top electrode 200, since the metal trace is short, both the transparent electrode and the metal electrode are made of the transparent conductive material 164 without metal. Can be implemented.

7 is a plan view illustrating a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a second embodiment of the present invention, and FIG. 8 conceptually illustrates a method of patterning a conductive polymer according to a second embodiment of the present invention. It is a figure shown.

The manufacturing method of the touch panel of the second embodiment of the present invention will be described in detail with the focus on the differences, and the description overlapping with the above-described manufacturing method of the touch panel of the first embodiment of the present invention will be omitted.

In the method of manufacturing the touch panel according to the second embodiment of the present invention, after forming an index-matching layer 112 on the upper surface of the insulator layer 110 and forming a transparent conductive layer 120 thereon, The metal layer 130 is formed on the upper surface of the transparent conductive layer 120.

According to the present invention, one end of each of the plurality of X-axis

electrostatic electrodes

122b and 120 formed of the transparent conductive layer 120 and the X-axis

electrostatic electrodes

122b and 120 formed of the metal layer 130 is formed by a photolithography process.

Wiring electrode patterns

132b and 130 connected thereto are formed.

Next, the present invention forms a transparent photosensitive resin layer 160 including a transparent photosensitive resin layer 162 made of a transparent insulating material on the upper surface of the touch panel, and a transparent conductive material 164 made of a conductive polymer thereon. .

The conductive polymer 164 may be polythiophene-based, polypyrrole-based, polyaniline-based, polyacetylene-based, polyphenylene-based, or the like, and is particularly preferable for the PEDOT / PSS compound among polythiophene-based compounds. One or more types of the above-described organic 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 164 maintains conductivity by the structure of the double bond benzene ring.

The conductive polymer 164 can be removed by the wet process, the wet process, as shown in Figure 8, by reacting with the etchant (ETCHANT) 170 to boil the structure of the double bond benzene ring to make a single bond conductive Can be eliminated.

As such, when the conductive polymer 164 is made of the non-conductive polymer 166, the polymer layer is maintained as it is, but the conductivity is lost, and the conductivity does not return to the double bond without a special catalyst.

The present invention forms a transparent conductive photosensitive film 160 of a transparent material on the upper surface of the touch panel, and then a portion corresponding to the plurality of Y-axis

electrostatic electrodes

122a and 164 and a respective Y-axis electrostatic electrode by a wet process. The non-conductive polymer 166 maintains the conductivity of the conductive polymer 164 of the

wiring electrode patterns

132a and 164 connected to one end of the 122a and 164, and loses the conductivity of the conductive polymer 164 in the non-pattern region. (Conductive polymer patterning process).

The present invention covers the FPCB bonding area to which the printed circuit board is bonded with a conductive polymer to prevent corrosion of the oxidation generating area, to prevent the problem of metal cracking by external pressure, and to act as a buffer during FPCB bonding, and to separate sealing and water repellent. The coating process is omitted, reducing the process cost.

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.

9 is a view illustrating a method of manufacturing a touch panel using a transparent conductive photosensitive film according to a third embodiment of the present invention in a layer structure from the side, and FIG. 10 is a transparent conductive photosensitive film according to a third embodiment of the present invention. It is a figure which showed the manufacturing method of the touchscreen using the plane.

The manufacturing method of the touch panel according to the third embodiment of the present invention will be described in detail with the focus on the differences and the description overlapping with the above-described manufacturing method of the touch panel of the first embodiment of the present invention.

In the method of manufacturing the touch panel according to the third embodiment of the present invention, as shown in FIGS. 9A and 10A, an index matching layer is formed on an upper surface of the insulator layer 110. And forming a transparent conductive layer 120 thereon, and then forming a plurality of X-axis

electrostatic electrodes

122b and 120 in a layer formed of the transparent conductive layer 120 by a photolithography process. do.

Next, as shown in FIGS. 9B and 10B, the present invention forms a plurality of X-axis electrostatic electrodes 122b including the transparent conductive layer 120, and then A transparent conductive photosensitive film 160 of transparent material is formed on the upper surface.

Next, as shown in FIGS. 9B and 10B, the present invention provides a transparent photosensitive resin layer in a layer formed of a transparent conductive photosensitive film 160 by an exposure and development process of photolithography. 162 and the transparent conductive material 164 stacked thereon are selectively removed to form a plurality of Y-axis

electrostatic electrodes

122a and 164.

Next, as shown in FIGS. 9C and 10C, after forming the metal layer 130 on the upper surface of the touch panel, the metal layer 130 is formed by a photolithography process. Selectively removes the wiring electrode pattern 132b connected to one end of each of the X-axis

electrostatic electrodes

122b and 120, and the wiring electrode connected to one end of each of the Y-axis

electrostatic electrodes

122a and 160. The pattern 132a is formed simultaneously.

The wiring electrode pattern 132b of the bottom electrode 100 and the wiring electrode pattern 132a of the top electrode 200 are formed of a metal layer 130, and are coated with silver paste printing or silver paste using ink for silk screen printing. It is then simultaneously formed in one process, such as photosensitive silver paste printing to implement a pattern by photolithography exposure and development processes.

When the chip performance is good or the wiring electrode pattern 132a of the top electrode 200 is shorter than the wiring electrode pattern 132b of the bottom electrode 100 as in the first embodiment of the present invention, When the structure of the touch panel of the first embodiment is difficult and the chip design is difficult or the metal section is long, it may have the structure of the touch panel of the third embodiment.

In another embodiment, in the method of manufacturing the touch panel according to the fourth embodiment of the present invention, the metal layer 130 is formed on the upper surface of the insulator layer 110, and a plurality of metal layers 130 are formed by a photolithography process. The X-axis electrostatic electrode 122b and the wiring electrode pattern 132b connected to one end of each X-axis electrostatic electrode 122b are formed. That is, the photolithography process is performed by dry film laminating, exposure, development, metal etching, peeling process.

In the photolithography process, the plurality of X-axis electrostatic electrodes 122b form a fine pattern metal mesh structure through the plurality of first linear electrode portions and the plurality of second linear electrode portions that cross each of the first linear electrode portions. Form.

When the metal mesh structure of the fine pattern is formed by performing the photolithography process (Wet process) to form the electrostatic electrode pattern 122b, the metal layer 130 is removed and patterned into a direct mesh structure or the metal layer 130 is deposited. Various embodiments (gravure offset printing, reverse printing, nano imprinting, etc.) may be formed using a laser etching method to form a mesh structure.

Next, the present invention forms a transparent conductive photosensitive film 160 on the upper surface of the touch panel, the transparent photosensitive resin layer 162 in the layer formed of the transparent conductive photosensitive film 160 by the exposure and development process of photolithography. And the plurality of Y-axis

electrostatic electrodes

122a and 164 and the wiring electrode patterns 132a connected to one end of each of the Y-axis

electrostatic electrodes

122a and 164 by selectively removing the transparent conductive material 164 stacked thereon. 164).

The bottom electrode 100 is formed of a metal mesh structure having a fine pattern formed of the metal layer 130, and the top electrode 200 is formed of a transparent conductive photosensitive film 160.

As still another embodiment, the manufacturing method of the touch panel according to the fifth embodiment of the present invention will be described in detail with the focus on the differences from the description overlapping with the manufacturing method of the touch panel of the third embodiment of the present invention described above. .

In the method of manufacturing the touch panel according to the fifth embodiment of the present invention, the transparent photosensitive resin layer 162 and the transparent conductive material stacked thereon are formed in the layer formed of the transparent conductive photosensitive film 160 by the photolithography exposure and development process. 164 is selectively removed to form a plurality of X-axis

electrostatic electrodes

122b and 120.

Next, the present invention after forming a plurality of X-axis electrostatic electrode 122b made of a transparent conductive photosensitive film 160, to form a transparent conductive photosensitive film 160 of a transparent material on the upper surface of the touch panel.

Next, the present invention selectively removes the transparent photosensitive resin layer 162 and the transparent conductive material 164 stacked thereon from the layer formed of the transparent conductive photosensitive film 160 by the photolithography exposure and development process. Y-axis

electrostatic electrodes

122a and 164 are formed.

Next, after the metal layer 130 is formed on the upper surface of the touch panel, one side end of each of the X-axis

electrostatic electrodes

122b and 120 is selectively removed by the photolithography process. And a wiring electrode pattern 132b connected to each other and a wiring electrode pattern 132a connected to one end of each of the Y-axis

electrostatic electrodes

122a and 160 are simultaneously formed.

In the third to fifth embodiments, like the second embodiment, the transparent conductive material 164 is made of a conductive polymer to maintain the conductivity of the conductive polymer 164, and the The conductivity of the conductive polymer 164 may be lost to make it a non-conductive polymer 166 (conductive polymer patterning process).

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 122: electrostatic electrode pattern

122a: Y-axis electrostatic electrode 122b: X-axis electrostatic electrode

130: metal layer 132: wiring electrode pattern

132a: first wiring electrode pattern 132b: second wiring electrode pattern

140: first photosensitive material 142: first artwork film

154: second artwork film 160: transparent conductive photosensitive film

162: transparent photosensitive resin layer 166: non-conductive polymer

164: transparent conductive material, conductive polymer 170: corrosion solution

Claims

In the manufacturing method of a touch panel,

A plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance are formed by selectively removing the transparent conductive layer, and connected to one end of each of the first axis electrostatic electrodes Selectively removing a plurality of metal conductors, which are edge regions of the touch panel, from the metal layer; And

After forming a transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, selectively removing the transparent conductive photosensitive film from the layer formed of the transparent conductive photosensitive film to be spaced a predetermined distance from each of the first axis electrostatic electrode Forming each of the second axis electrostatic electrodes that cross each other and a wiring electrode that is an edge region of the touch panel connected to one end of each of the second axis electrostatic electrodes;

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

Selectively removing the transparent conductive layer from the plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance;

After forming a transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, selectively removing the transparent conductive photosensitive film from the layer formed of the transparent conductive photosensitive film to be spaced a predetermined distance from each of the first axis electrostatic electrode Forming the second axis electrostatic electrode to cross each other; And

Forming a metal layer on an upper surface of the touch panel, and selectively removing the metal layer to form a plurality of first metal conductors which are edge regions of the touch panel connected to one end of each of the first axis electrostatic electrodes; Simultaneously forming a plurality of second metal conductors, which are edge regions of the touch panel, connected to one end of each of the second axis electrostatic electrodes;

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

A plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance, and a plurality of edge regions of the touch panel connected to one end of each of the first axis electrostatic electrodes; Forming a metal conductive wire in a fine pattern metal mesh structure formed of one metal layer; And

After forming a transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, selectively removing the transparent conductive photosensitive film from the layer formed of the transparent conductive photosensitive film to be spaced a predetermined distance from each of the first axis electrostatic electrode Forming each of the second axis electrostatic electrodes that cross each other, and a wiring electrode which is an edge region of the touch panel connected to one end of each of the second axis electrostatic electrodes;

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

Selectively removing the first transparent conductive photosensitive film made of a transparent material from a plurality of first axis electrostatic electrodes corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance;

After forming a second transparent conductive photosensitive film of a transparent material on the upper surface of the touch panel, each of the first crossing the first axis electrostatic electrode and a predetermined distance in the layer formed of the second transparent conductive photosensitive film Forming a biaxial electrostatic electrode by selectively removing the second transparent conductive photosensitive film; And

Forming a metal layer on an upper surface of the touch panel, and selectively removing the metal layer to form a plurality of first metal conductors which are edge regions of the touch panel connected to one end of each of the first axis electrostatic electrodes; Simultaneously forming a plurality of second metal conductors, which are edge regions of the touch panel, connected to one end of each of the second axis electrostatic electrodes;

Method of manufacturing a touch panel comprising a.
The method according to any one of claims 1 to 4,

The transparent conductive photosensitive film, the first transparent conductive photosensitive film, and the second transparent conductive photosensitive film include a transparent photosensitive resin layer made of a transparent insulating material, and a carbon nanotube as a material of a transparent material laminated on the conductive material and having a photosensitive property. (Carbon Nano Tube, CNT), Graphene, Conductive Polymer, Silver Nanowires (AGNW), Hybrid AGNW (CNT + AGNW), Hybrid Graphene (AGNW + Graphene), 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 + Cu + Ti, carbon, a method of manufacturing a touch panel which is a material of transparent conducting oxide (Transparent Conducting Oxide).
The method of claim 1,

Forming the wiring electrode,

Forming a transparent conductive photosensitive film including a transparent photosensitive resin layer made of a transparent insulating material on the upper surface of the touch panel and a transparent conductive material made of a conductive polymer thereon; And

The conductivity of the conductive polymer of each of the second axis electrostatic electrode and the wiring electrode in the layer formed of the transparent conductive photosensitive film by a wet process of reacting with a corrosion solution to remove the conductivity by boiling the structure of the double bond benzene ring to form a single bond. Maintaining the conductivity and losing the conductivity of the conductive polymers in the portions not corresponding to the respective second axis electrostatic electrodes and the wiring electrodes to form non-conductive polymers.

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

The wiring electrode, which is an edge region of the touch panel connected to one end of each of the second axis electrostatic electrodes, is a plurality of metals that are edge regions of the touch panel connected to one end of each of the first axis electrostatic electrodes. A method of manufacturing a touch panel in which a section length is shorter than a conductive line.
In the touch panel,

An insulator layer formed of an organic insulator or an inorganic insulator, and a transparent conductive layer formed on an upper surface of the insulator layer and forming a plurality of first axis electrostatic electrodes corresponding to the window region of the touch panel and spaced apart at regular intervals. And a bottom electrode forming a plurality of metal conductors, which are edge regions of the touch panel, connected to one end of the plurality of first axis electrostatic electrodes; And

The second electrode of the first electrode and the wiring electrode, which is an edge region of the touch panel connected to one end of the second electrode of the second electrode, the transparent electrode is made of a transparent material A top electrode formed of a conductive photosensitive film, wherein the transparent conductive photosensitive film is formed of a transparent photosensitive resin layer made of a transparent insulating material and a transparent conductive material which is a conductive material of a transparent material stacked thereon; The top panel is laminated on the top surface of the bottom electrode by the transparent photosensitive resin layer.
In the touch panel,

An insulator layer formed of an organic insulator or an inorganic insulator, and a transparent conductive layer formed on an upper surface of the insulator layer and forming a plurality of first axis electrostatic electrodes corresponding to the window region of the touch panel and spaced apart at regular intervals. And a bottom electrode forming a plurality of first metal conductors, which are edge regions of the touch panel, connected to one end of the plurality of first axis electrostatic electrodes; And

A transparent conductive photosensitive film made of a transparent material corresponding to the window area of the touch panel and forming respective second axis electrostatic electrodes crossing the first axis electrostatic electrode at a predetermined distance and intersecting with each other, and the second axis electrostatic electrode A top electrode forming a plurality of second metal conductors, which are edge regions of the touch panel connected to one end of the touch panel, wherein the transparent conductive photosensitive film comprises a transparent photosensitive resin layer made of a transparent insulating material, and A touch panel comprising a transparent conductive material which is a conductive material of a transparent material laminated on the top, and laminating the top electrode on the upper surface of the transparent conductive layer by the transparent photosensitive resin layer.
In the touch panel,

An insulator layer formed of an organic insulator or an inorganic insulator, a plurality of first axis electrostatic electrodes formed on an upper surface of the insulator layer, corresponding to the window region of the touch panel, and spaced at intervals of a predetermined distance; A bottom electrode forming a plurality of metal conductors, which are edge regions of the touch panel, connected to one end of the uniaxial electrostatic electrode in a fine pattern metal mesh structure formed of one metal layer; And

The second electrode of the first electrode and the wiring electrode, which is an edge region of the touch panel connected to one end of the second electrode of the second electrode, the transparent electrode is made of a transparent material A top electrode formed of a conductive photosensitive film, wherein the transparent conductive photosensitive film is formed of a transparent photosensitive resin layer made of a transparent insulating material and a transparent conductive material which is a conductive material of a transparent material stacked thereon; The top panel is laminated on the top surface of the bottom electrode by the transparent photosensitive resin layer.
In the touch panel,

A first transparent conductive photosensitive film made of a transparent material corresponding to the window area of the touch panel and spaced apart at intervals of a predetermined distance, and having one end of each of the first axis electrostatic electrodes; A bottom electrode forming a plurality of first metal conductors, which are edge regions of the touch panel, connected to each other; And

A second transparent conductive photosensitive film made of a transparent material corresponding to the window area of the touch panel and forming respective second axis electrostatic electrodes crossing the first axis electrostatic electrodes at a predetermined distance from each other; And a top electrode forming a plurality of second metal conductors, which are edge regions of the touch panel, connected to one end of the biaxial electrostatic electrode, wherein the first transparent conductive photosensitive film and the second transparent conductive photosensitive member are formed. The film is made of a transparent photosensitive resin layer made of a transparent insulating material and a transparent conductive material which is a conductive material of a transparent material stacked thereon, and the top electrode on the top surface of the bottom electrode is transparent of the second transparent conductive photosensitive film. The touch panel laminated by the photosensitive resin layer.
The method according to any one of claims 8 to 11,

The transparent conductive material, the first transparent conductive photosensitive film, and the second transparent conductive photosensitive film are carbon nanotubes (CNTs), graphene (Graphene), conductive polymers as materials of transparent and conductive materials. Silver Nanowires (AGNW), Hybrid AGNW (CNT + AGNW), Hybrid Graphene (AGNW + Graphene), 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 Touch panel, which is one of / Cu / Ni + Cu + Ti, carbon, or transparent conducting oxide.
The method of claim 8,

When the transparent conductive material is a conductive polymer, the second axis electrostatic electrode and the wiring electrode to maintain the conductivity of the conductive polymer and to lose the conductivity of the conductive polymer of the remaining area to make a non-conductive polymer.