JP6922735B2 - Touch panel sensor and manufacturing method of touch panel sensor - Google Patents

Description

The present invention relates to a touch panel sensor and a method for manufacturing a touch panel sensor, and more particularly to a method for manufacturing a touch panel sensor and a touch panel sensor that can make the boundary between the X electrode and the Y electrode difficult to see.

The capacitive touch panel includes a plurality of X electrodes arranged in parallel on one surface of the transparent base material, and a plurality of Y electrodes arranged in parallel on the other surface of the transparent base material, and between these electrodes and a human finger. The position coordinates on the touch panel are detected by using the induced current generated by the change of the capacitance based on the electrostatic coupling in.

As such an X electrode and a Y electrode, a transparent conductive film made of an indium-tin composite oxide (ITO) formed by a sputtering method has been used.

On the other hand, instead of the ITO transparent conductive film, it has been attempted to construct the X electrode and the Y electrode with a transparent conductive film composed of an aggregate of conductors (Patent Document 1).

A transparent conductive film made of an aggregate of conductors can realize a lower resistance than an ITO transparent conductive film. This makes it possible to suitably manufacture a large area touch panel, a pen input touch panel, and the like.

However, when a metal having a particularly low resistance is used as the material of the conductor, the material itself shields light, so that there is a limit to the improvement of the transmittance even if the conductor is thinned. It is possible to improve the transmittance to some extent by widening the distance between the arranged conductors or narrowing the wire width, but the resistance value will increase and disconnection will easily occur. Or

Therefore, it is difficult to make a transparent conductive film composed of an aggregate of conductors completely transparent, and a technique for making it difficult to see is required.

Japanese Unexamined Patent Publication No. 2012-103761

In Patent Document 1, it is desirable that the pattern formation and the superposition of the X electrode and the Y electrode are accurate. Since the arrangement relationship with and may be disturbed, line thickening and interference fringes are likely to occur. Therefore, in order to prevent line thickening and interference fringes, high accuracy is required for superposition, and it is disclosed that there is a problem leading to cost increase. Therefore, in order to solve this problem, by crossing the conductors constituting the X electrode and the Y electrode in a specific pattern, even if there is an error in superimposing the two electrodes or a shape error of the conductors, the grid shape is formed. It is said that an effect that does not make you feel uncomfortable can be obtained.

However, since the Y electrode is arranged via the transparent base material with respect to the X electrode provided on the user side at the time of use, the visibility of the X electrode is the visibility of the Y electrode due to, for example, the difference in the optical path length. Higher than sex. As a result, it has been found that the user can visually recognize the boundary between the X electrode and the Y electrode.

Therefore, an object of the present invention is to provide a touch panel sensor and a method for manufacturing a touch panel sensor that can make the boundary between the X electrode and the Y electrode difficult to see.

Further, other problems of the present invention will be clarified by the following description.

The above problems are solved by the following inventions.

1. 1.
A touch panel sensor having an X electrode on one surface of a transparent base material, a Y electrode on the other side of the transparent base material, and a display arranged on the Y electrode side.
The X electrode and the Y electrode are composed of a combination of a plurality of sets of conductive parallel thin wires each consisting of a set of two conductive thin wires.
The conductive thin wire constituting the X electrode and the conductivity constituting the Y electrode so as to reduce the difference in visibility between the X electrode and the Y electrode when the touch panel sensor is viewed from the X electrode side. A touch panel sensor that differs in shape and / or properties from the fine wire.
2.
The shape of the conductive thin wire forming the X electrode and the conductive thin wire forming the Y electrode is a line width, and the line width of the conductive thin wire forming the X electrode and the Y electrode are used. The touch panel sensor according to 1 above, which has a different line width from the constituent thin conductive wires.
3. 3.
2. The touch panel sensor according to 2, wherein the line width of the conductive thin wire constituting the X electrode is smaller than the line width of the conductive thin wire constituting the Y electrode.
4.
The property of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the reflectance, and the reflectance of the conductive thin wire constituting the X electrode and the Y electrode are used. The touch panel sensor according to 1 above, which has a different reflectance from the constituent thin conductive wire.
5.
4. The touch panel sensor according to 4, wherein the reflectance of the conductive thin wire constituting the X electrode is smaller than the reflectance of the conductive thin wire constituting the Y electrode.
6.
The shape of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the film thickness, and the film thickness of the conductive thin wire constituting the X electrode and the Y electrode are used. The touch panel sensor according to 1 above, wherein the thickness of the conductive thin wire is different from that of the constituent wire.
7.
The touch panel sensor according to 6, wherein the film thickness of the conductive thin wire constituting the X electrode is smaller than the film thickness of the conductive thin wire constituting the Y electrode.
8.
The touch panel sensor according to any one of 1 to 7, wherein the support on which the X electrode is formed and the support on which the Y electrode is formed are bonded together.
9.
The touch panel sensor according to any one of 1 to 8, wherein the X electrode and the Y electrode are formed on both sides of the same support.
10.
The conductive parallel thin wires constituting the X electrode and the Y electrode use the conductive material as the line-shaped liquid when the line-shaped liquid containing the conductive material applied on the transparent base material is dried. The touch panel sensor according to any one of 1 to 9 above, which is formed by selectively depositing on both edges.
11.
The touch panel sensor according to any one of 1 to 10, wherein the conductive thin wire constituting one or both of the X electrode and the Y electrode includes a metal film formed by plating.
12.
A method for manufacturing a touch panel sensor in which an X electrode is provided on one surface of a transparent base material, a Y electrode is provided on the other side of the transparent base material, and a display is arranged on the Y electrode side.
The X electrode and the Y electrode are formed by combining a plurality of sets of conductive parallel thin wires each consisting of a set of two conductive thin wires.
The conductive thin wire constituting the X electrode and the conductivity constituting the Y electrode so as to reduce the difference in visibility between the X electrode and the Y electrode when the touch panel sensor is viewed from the X electrode side. A method for manufacturing a touch panel sensor that differs in shape and / or properties from the fine wire.
13.
The shape of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is a line width, and the line width of the conductive thin wire constituting the X electrode and the Y electrode 12. The method for manufacturing a touch panel sensor according to 12.
14.
13. The touch panel sensor according to 13. Production method.
15.
The property of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the reflectance, and the reflectance of the conductive thin wire constituting the X electrode and the Y electrode are used. The method for manufacturing a touch panel sensor according to 12.
16.
The touch panel sensor according to 15. Production method.
17.
The shape of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the film thickness, and the film thickness of the conductive thin wire constituting the X electrode and the Y electrode are used. The method for manufacturing a touch panel sensor according to the above 12, wherein the thickness of the conductive thin wire to be configured is different.
18.
The touch panel sensor according to 17. Production method.
19.
The method for manufacturing a touch panel sensor according to any one of 12 to 18, wherein the support on which the X electrode is formed and the support on which the Y electrode is formed are bonded together.
20.
The method for manufacturing a touch panel sensor according to any one of 12 to 19, wherein the X electrode and the Y electrode are formed on both sides of the same support.
21.
When the line-shaped liquid containing the conductive material applied on the transparent substrate is dried, the conductive material is selectively deposited on both edges of the line-shaped liquid to form the X electrode and the Y electrode. The method for manufacturing a touch panel sensor according to any one of 12 to 20 above, which forms a conductive parallel thin wire constituting the above.
22.
The method for manufacturing a touch panel sensor according to any one of 12 to 21, wherein a metal film is formed on the conductive thin wire constituting one or both of the X electrode and the Y electrode.

According to the present invention, it is possible to provide a touch panel sensor capable of making the boundary between the X electrode and the Y electrode difficult to see, and a method for manufacturing the touch panel sensor.

The figure explaining an example of a touch panel sensor Enlarged view of the main part of the touch panel sensor shown in FIG. The figure explaining the X electrode in FIG. The figure explaining the Y electrode in FIG. Diagram illustrating another example of a touch panel sensor A diagram illustrating yet another example of a touch panel sensor. Diagram explaining the coffee stain phenomenon The figure explaining an example of the parallel line formed on the transparent base material The figure explaining an example when the transparent base material has a single layer structure The figure explaining an example when the transparent base material has a laminated structure

Hereinafter, embodiments for carrying out the present invention will be described in detail.

FIG. 1 is a diagram illustrating an example of the touch panel sensor of the present invention.

In the touch panel sensor 1, a plurality of strip-shaped X electrodes 3 are arranged side by side in the X-axis direction at predetermined intervals on the front surface of the sheet-shaped transparent base material 2, and strip-shaped Y electrodes 4 are arranged in the Y-axis direction at predetermined intervals on the back surface. Multiple pieces are installed side by side. Here, the surface of the transparent base material 2 is a surface arranged on the user side when the touch panel sensor 1 is used. A display can be arranged and used on the back surface side of the transparent base material 2.

The X-axis direction and the Y-axis direction intersect each other. The X electrode and the Y electrode intersect each other at the intersection 5 at intervals corresponding to the thickness of the transparent base material 2. The X electrode 3 and the Y electrode 4 are insulated from each other by the transparent base material 2.

The touch panel sensor 1 can be suitably used as a sensor for a touch panel of, for example, a capacitance method by connecting the X electrode 3 and the Y electrode 4 to a control circuit. In the case of a capacitance type touch panel, an induced current based on a change in capacitance generated when a user's finger, a conductor, or the like approaches or comes into contact with the X electrode 3 and the Y electrode 4 during operation is used. It can detect the position coordinates of fingers, conductors, etc.

Each one of the X electrodes 3 is composed of an aggregate of conductive thin wires. Each Y electrode 4 is also composed of an aggregate of conductive thin wires. This will be described with reference to FIGS. 2 to 4. FIG. 2 is an enlarged view of a main part of the touch panel sensor 1 shown in FIG. 1, and a part of the intersection 5 (a square part shown by A in FIG. 1) is enlarged and shown. Further, FIG. 3 shows only the X electrode 3 in FIG. 2, and FIG. 4 shows only the Y electrode 4 in FIG.

First, as shown in FIG. 3, the X electrode 3 is composed of an aggregate of conductive thin wires 31. Specifically, the X electrode 3 is configured by combining a plurality of conductive parallel lines (hereinafter, may be simply referred to as parallel lines) 32 composed of a set of two conductive thin wires 31 and 31 parallel to each other. In the illustrated example, the first wire set 33a in which three sets of parallel lines 32 are juxtaposed at predetermined intervals and the second wire set 33b in which three sets of parallel lines 32 are juxtaposed at predetermined intervals intersect each other. A plurality of X electrodes 3 are arranged in a mesh shape so as to form an X electrode 3.

Further, as shown in FIG. 4, the Y electrode 4 is also composed of an aggregate of conductive thin wires 41. Specifically, the Y electrode 4 is configured by combining a plurality of parallel wires 42 composed of a set of two conductive thin wires 41 and 41 parallel to each other. In the illustrated example, the first wire set 43a in which three sets of parallel lines 42 are juxtaposed at predetermined intervals and the second wire set 43b in which three sets of parallel lines 42 are juxtaposed at predetermined intervals intersect each other. A plurality of Y electrodes 4 are arranged in a mesh shape so as to form a Y electrode 4.

As shown in FIG. 2, when the transparent base material 2 is seen through, the first wire set 33a constituting the X electrode 3 and the first wire set 43a constituting the Y electrode 4 are in a parallel relationship with each other. And they are arranged alternately so as not to overlap each other. Similarly, when the transparent base material 2 is viewed through, the second wire set 33b constituting the X electrode 3 and the second wire set 43b constituting the Y electrode 4 are in a parallel relationship with each other and overlap each other. They are arranged alternately so that they do not become. A plurality of sets of parallel wires 32, 42 constituting each of the thin wire sets 33a, 33b, 43a, 43b are arranged side by side so that the conductive thin wires 31, 41 included therein are arranged at equal intervals.

When the X electrode 3 and the Y electrode 4 are composed of an aggregate of conductive thin wires 31 and 41, respectively, the difference in visibility between the X electrode 3 and the Y electrode 4 when the touch panel sensor 1 is viewed from the X electrode 3 side is observed. The shapes and / or properties of the conductive thin wire 31 constituting the X electrode 3 and the conductive thin wire 41 constituting the Y electrode 4 are different so as to be reduced. As a result, the boundary between the X electrode 3 and the Y electrode 4 can be made difficult to see. The shape and / or properties of the conductive thin wires 31 and 41 may affect the visibility of the X electrode 3 and the Y electrode 4 composed of the conductive thin wires 31 and 41. As the shape, for example, the cross-sectional shape of the conductive thin wires 31 and 41, more specifically, the line width, the film thickness, and the like can be preferably mentioned. As the properties, for example, the surface properties of the conductive thin wires 31 and 41, more specifically, the reflectance and the like can be preferably mentioned.

When the line widths of the conductive thin wires 31 and 41 are different, the visibility is increased by increasing the line width, and the visibility is decreased by decreasing the line width. Since the X electrode 3 arranged on the user side during use has higher visibility than the Y electrode 4, the line width of the conductive thin wire 31 constituting the X electrode 3 is the conductive thin wire constituting the Y electrode 4. It is preferably smaller than the line width of 41. As a result, the boundary between the X electrode 3 and the Y electrode 4 can be suitably made difficult to see. The line width of the conductive thin wire 41 constituting the Y electrode 4 is preferably in the range of 1.1 times or more and less than 1.5 times the line width of the conductive thin wire 31 forming the X electrode 3. Within this range, the effect of making visibility difficult is excellent, the light transmission of the Y electrode 4 is easily obtained, and it is possible to preferably prevent the Y electrode 4 from being overvisible. The line widths of the conductive thin wires 31 and 41 constituting the X electrode 3 and the Y electrode 4 are not particularly limited, but are preferably in the range of 1 μm or more and 20 μm or less, and more preferably in the range of 2 μm or more and 15 μm or less. It is preferable to give the above-mentioned difference in line width within the range.

When the reflectances of the conductive thin wires 31 and 41 are different, the visibility is increased by increasing the reflectance, and the visibility is decreased by decreasing the reflectance. Since the X electrode 3 arranged on the user side during use has higher visibility than the Y electrode 4, the reflectance of the conductive thin wire 31 constituting the X electrode 3 is the conductive thin wire constituting the Y electrode 4. It is preferably smaller than the reflectance of 41. As a result, the boundary between the X electrode 3 and the Y electrode 4 can be suitably made difficult to see. The reflectance can be obtained from the spectral reflectance measured on the surface on which the conductive thin wire to be measured is formed using a spectrophotometer. Specifically, a U-4000 type (manufactured by Hitachi, Ltd.) is used as a specular photometer, and after roughening the back surface of the surface on which the conductive thin wire to be measured is formed, light absorption treatment is performed with a black spray. It is possible to prevent the reflection of light on the back surface and measure the reflectance in the visible light region (400 to 700 nm) under the condition of 5 degree specular reflection. The reflectance of the conductive thin wire 41 constituting the Y electrode 4 is preferably in the range of 1.1 times or more and less than 1.6 times the reflectance of the conductive thin wire 31 constituting the X electrode 3. Within this range, the effect of making it difficult to see is excellent, and it is possible to preferably prevent the Y electrode 4 from being overvisible. The reflectances of the conductive thin wires 31 and 41 constituting the X electrode 3 and the Y electrode 4 are not particularly limited, but are preferably in the range of 1% or more and 20% or less, and more preferably in the range of 5% or more and 15% or less. It is possible, and it is preferable to impart the above-mentioned difference in reflectance within this range.

When the film thicknesses of the conductive thin wires 31 and 41 are different, the visibility is increased by increasing the film thickness, and the visibility is decreased by decreasing the film thickness. Since the X electrode 3 arranged on the user side during use has higher visibility than the Y electrode 4, the film thickness of the conductive thin wire 31 constituting the X electrode 3 is the conductive thin wire constituting the Y electrode 4. It is preferably smaller than the film thickness of 41. As a result, the boundary between the X electrode 3 and the Y electrode 4 can be suitably made difficult to see. The film thickness of the conductive thin wire 41 constituting the Y electrode 4 is preferably in the range of 1.1 times or more and less than 2.0 times the film thickness of the conductive thin wire 31 constituting the X electrode 3. Within this range, the effect of making visibility difficult is excellent, the light transmission of the Y electrode 4 is easily obtained, and it is possible to preferably prevent the Y electrode 4 from being overvisible. The film thicknesses of the conductive thin wires 31 and 41 constituting the X electrode 3 and the Y electrode 4 are not particularly limited, but are preferably in the range of 50 nm or more and 10 μm or less, and more preferably in the range of 1 μm or more and 5 μm or less. It is preferable to impart the above-mentioned difference in film thickness within this range.

When setting the shape and / or properties, the shape and / or properties of all the conductive thin wires 31 constituting the X electrode 3 may be set under the same conditions, or the conductive thin wires 31 constituting the X electrode 3 may be set. The shape and / or properties may be set to different conditions for each part of. Hereinafter, an example in which the shape and / or properties are set to different conditions for each portion of the conductive thin wire 31 constituting the X electrode 3 will be described with reference to FIG.

In FIG. 5, the X electrode 3 is formed by combining thin wire sets 33a and 33b. In the thin wire sets 33a and 33b, the conductive thin wires 31 forming the parallel wires 32 arranged on both outer sides are provided to have a smaller line width than the conductive thin wires 31 forming the parallel wires 32 arranged on the center side. There is. The conductive thin wires 31 forming the parallel wires 32 arranged on both outer sides are adjacent to the conductive thin wires 41 forming the Y electrode 4. By reducing the line width of the conductive thin wire 31 to reduce the visibility, it is possible to reduce the difference in visibility with respect to the conductive thin wire 41 having a relatively low visibility. As a result, the visibility of the conductive thin wires 31 and 41 gradually changes gradually from the X electrode 3 to the Y electrode 4, and the boundary between the X electrode 3 and the Y electrode 4 can be made difficult to see.

In the explanation of FIG. 5, the case where the line widths of the conductive thin wires 31 and 41 are different is shown, but the present invention is not limited to this, and any shape and / or property may be different, for example, reflectance, film thickness, etc. Can be different.

Further, in the description of FIG. 5, an example in which the shape and / or properties are set to different conditions for each portion of the conductive thin wire 31 constituting the X electrode 3 has been shown, but the portion of the conductive thin wire 41 constituting the Y electrode 4 has been shown. It is also preferable to set the shape and / or properties of each to different conditions.

In the example described above, the case where the thin wire sets 33a and 33b of the X electrode 3 are composed of three sets of parallel wires 32 and the thin wire sets 43a and 43b of the Y electrode 4 are composed of three sets of parallel wires 42 is shown. However, it is not limited to this. The number of sets of parallel lines 32 constituting the thin wire sets 33a and 33b of the X electrode 3 and the number of sets of parallel lines 42 forming the thin wire sets 43a and 43b of the Y electrode 4 can be set individually, for example. It is preferable to set in the range of 2 to 10 sets. The same value may be set for the number of sets of parallel lines 32 constituting the thin wire sets 33a and 33b of the X electrode 3 and the number of sets of parallel lines 42 constituting the thin wire sets 43a and 43b of the Y electrode 4. , It is also preferable to set different values.

For example, when the cross-sectional shape such as the line width and the film thickness is changed as the shape, the resistance value of the conductive thin wire also changes. In order to suppress the change in sheet resistance as an electrode with such a change in resistance value, it is also preferable to make the number of sets of parallel lines constituting the thin wire set different between the X electrode and the Y electrode. .. This will be described with reference to FIG.

In the example of FIG. 6, the number of sets of parallel lines 32 constituting the thin wire sets 33a and 33b of the X electrode 3 (4 sets in the illustrated example) is set to the number of parallel lines 42 forming the thin wire sets 43a and 43b of the Y electrode 4. The number of pairs is larger than the number of pairs (3 pairs in the illustrated example). In this way, for example, even when the line width and film thickness of the conductive thin wire 31 constituting the X electrode 3 is smaller than the conductive thin wire 41 constituting the Y electrode 4, the sheet resistance of the X electrode 3 It is possible to suppress the difference between the sheet resistance of the Y electrode 4 and the sheet resistance of the Y electrode 4.

In the above description, the conductive thin wires 31 and 41 are arranged in a direction in which the conductive thin wires 31 and 41 are inclined with respect to the forming direction of the X electrode 3 and the Y electrode 4, but the present invention is not limited to this. For example, the conductive thin wires 31 and 41 may be arranged in a direction parallel to or orthogonal to the forming direction of the X electrode 3 and the Y electrode 4.

The method for forming the conductive thin wires 31 and 41 is not particularly limited, but from the viewpoint of suitably adjusting the shape and / or properties of the conductive thin wires 31 and 41, a method for forming the conductive thin wires 31 and 41 by utilizing the coffee stain phenomenon is preferably used. can. This will be described with reference to FIG. In the following description, the case where the conductive thin wire 31 forming the X electrode 3 is mainly formed will be described, but the conductive thin wire 41 forming the Y electrode 4 can also be formed in the same manner.

First, the liquid 6 containing the conductive material is applied in a line shape to the surface of the transparent base material 2 (FIG. 7A). A droplet ejection method such as an inkjet method can be preferably used for applying the line-shaped liquid 6. Next, when the linear liquid 6 is evaporated and dried, the conductive material is selectively deposited on both edges of the linear liquid 6 by utilizing the coffee stain phenomenon. As a result, parallel lines 32 composed of a set of two conductive thin wires 31 and 31 parallel to each other containing the conductive material are formed on the transparent base material 2 (FIG. 7 (b)).

Further, when a further line-shaped liquid 6 is applied so as to intersect the parallel lines 32 formed as described above (FIG. 7 (c)), and then the line-shaped liquid 6 is evaporated and dried, the above-mentioned Similarly, by utilizing the coffee stain phenomenon, the parallel line 32 can be formed so as to intersect with the previously formed parallel line 32 (FIG. 7 (d)).

By combining a plurality of sets of parallel lines 32, for example, the X electrode 3 as shown in FIG. 2 can be formed. The Y electrode 4 can also be formed in the same manner.

It is preferable to set the conditions for drying the linear liquid 6 so as to promote the coffee stain phenomenon. That is, the linear liquid 6 arranged on the transparent substrate 2 dries faster at the edge than the central portion, and local deposition of the conductive material occurs at the edge of the linear liquid 6. The edge of the line-shaped liquid 6 is fixed by the deposited conductive material, and the shrinkage of the line-shaped liquid 6 in the width direction due to the subsequent drying is suppressed. The liquid of the line-shaped liquid 6 forms a flow from the central portion to the edge so as to make up for the amount of liquid lost due to evaporation at the edge. This flow carries additional conductive material to the edges and deposits. This flow is due to the immobilization of the contact line of the line-shaped liquid 6 and the difference in the amount of evaporation between the central portion and the edge of the line-shaped liquid 6 due to drying. Therefore, in order to promote this flow, the concentration of the conductive material, the contact angle between the line-shaped liquid 6 and the transparent base material 2, the amount of the line-shaped liquid 6, the heating temperature of the transparent base material 2, and the arrangement density of the line-shaped liquid 6 , Or it is preferable to set conditions such as temperature, humidity, and environmental factors of atmospheric pressure.

For example, it is possible to form a thin line-shaped liquid by using a droplet ejection method such as an inkjet method, but the conductive thin wire formed from the line-shaped liquid by the coffee stain phenomenon is larger than the line-shaped liquid. It becomes even thinner. By utilizing the coffee stain phenomenon, the conductive thin wire can be thinned to the extent that it is difficult to see by itself. However, when the X electrode and the Y electrode are formed by the aggregate of the conductive thin wires, the boundary between the X electrode and the Y electrode is visually recognized as it is. By making the shape and / or property of the conductive thin wire different between the X electrode and the Y electrode as described above, it is possible to make such a boundary difficult to see.

When the conductive thin wire is formed by utilizing the coffee stain phenomenon, the line width of the conductive thin wire can be suitably adjusted by adjusting the concentration of the conductive material contained in the linear liquid. Specifically, when increasing the line width of the conductive thin wire, the concentration of the conductive material contained in the linear liquid may be increased, and when decreasing the line width of the conductive thin wire, the linear liquid may be used. The concentration of the conductive material to be contained may be lowered. It is preferable that the concentration of the conductive material in the linear liquid used for the conductive thin wire constituting the X electrode is lower than the concentration of the conductive material in the linear liquid used for the conductive thin wire constituting the Y electrode. ..

When forming a conductive thin wire by utilizing the coffee stain phenomenon, the conductive fine particles are used as the conductive material to be contained in the linear liquid, and the volume average particle diameter of the conductive fine particles is adjusted. The reflectance of the conductive thin wire can be suitably adjusted. As the conductive fine particles used for the conductive thin wires constituting the X electrode, it is preferable to use those having a smaller volume average particle diameter than the conductive fine particles used for the conductive fine wires constituting the Y electrode.

As the conductive material contained in the line-shaped liquid, for example, conductive fine particles, a conductive polymer and the like can be preferably exemplified.

The conductive fine particles are not particularly limited, but Au, Pt, Ag, Cu, Ni, Cr, Rh, Pd, Zn, Co, Mo, Ru, W, Os, Ir, Fe, Mn, Ge, Sn, Ga. , In and other fine particles can be preferably exemplified. Among them, metal fine particles such as Au, Ag and Cu are more preferable because they can form conductive thin wires having low electrical resistance and resistance to corrosion. From the viewpoint of cost and stability, metal fine particles containing Ag, particularly silver nanoparticles, are most preferable. The volume average particle size of these metal fine particles is preferably in the range of 1 to 100 nm, more preferably in the range of 3 to 50 nm. The particle size was measured with a Zetasizer 1000HS manufactured by Malvern.

It is also preferable to use carbon fine particles as the conductive fine particles. As the carbon fine particles, graphite fine particles, carbon nanotubes, fullerenes and the like can be preferably exemplified.

When conductive fine particles are used as the conductive material, the volume average particle diameter of the conductive fine particles can be adjusted and used in order to adjust the reflectance of the power transmission fine wire as described above.

The conductive polymer is not particularly limited, but a π-conjugated conductive polymer can be preferably mentioned.

The π-conjugated conductive polymer is not particularly limited, and polythiophenes, polypyrroles, polyindoles, polycarbazoles, polyanilines, polyacetylenes, polyfurans, polyparaphenylenes, polyparaphenylene vinylenes, and poly Chain conductive polymers such as paraphenylene sulfides, polyazulenes, polyisothianaftens, and polythiazils can be used. Of these, polythiophenes and polyanilines are preferable because high conductivity can be obtained. Most preferably, it is polyethylene dioxythiophene.

The conductive polymer more preferably comprises the above-mentioned π-conjugated conductive polymer and polyanion. Such a conductive polymer can be easily produced by chemically oxidatively polymerizing a precursor monomer forming a π-conjugated conductive polymer in the presence of an appropriate oxidizing agent, an oxidation catalyst, and a polyanion.

Polyanions are substituted or unsubstituted polyalkylenes, substituted or unsubstituted polyalkenylenes, substituted or unsubstituted polyimides, substituted or unsubstituted polyamides, substituted or unsubstituted polyesters, and copolymers thereof, which are anions. It is composed of a structural unit having a group and a structural unit having no anionic group.

This polyanion is a solubilized polymer that solubilizes a π-conjugated conductive polymer in a solvent. Further, the anionic group of the polyanion functions as a dopant for the π-conjugated conductive polymer, and improves the conductivity and heat resistance of the π-conjugated conductive polymer.

The anionic group of the polyanion may be a functional group capable of chemically oxidizing a π-conjugated conductive polymer, but from the viewpoint of ease of production and stability, a monosubstituted sulfate group is used. A monosubstituted phosphoric acid ester group, a phosphoric acid group, a carboxy group, a sulfo group and the like are preferable. Further, from the viewpoint of the doping effect of the functional group on the π-conjugated conductive polymer, a sulfo group, a monosubstituted sulfate group and a carboxy group are more preferable.

Specific examples of the polyanion include polyvinyl sulfonic acid, polystyrene sulfonic acid, polyallyl sulfonic acid, ethyl acrylate poly acrylate, butyl sulfonic acid poly acrylate, poly-2-acrylamide-2-methyl propane sulfonic acid, and polyisoprene sulfonic acid. Examples thereof include acids, polyvinylcarboxylic acids, polystyrene carboxylic acids, polyallylcarboxylic acids, polyacrylic carboxylic acids, polymethacrylcarboxylic acids, poly-2-acrylamide-2-methylpropanecarboxylic acids, polyisoprenecarboxylic acids, and polyacrylic acids. .. These homopolymers may be used, or two or more kinds of copolymers may be used.

Further, it may be a polyanion having F (fluorine atom) in the compound. Specific examples thereof include Nafion (manufactured by DuPont) containing a perfluorosulfonic acid group, Flemion (manufactured by Asahi Glass Co., Ltd.) made of perfluoro vinyl ether containing a carboxylic acid group, and the like.

Of these, a compound having a sulfonic acid is more preferable because the ink ejection stability is particularly good and high conductivity can be obtained when the inkjet printing method is used.

Further, among these, polystyrene sulfonic acid, polyisoprene sulfonic acid, ethyl sulfonic acid polyacrylate, and butyl sulfonic acid polyacrylate are preferable. These polyanions have the effect of being excellent in conductivity.

The degree of polymerization of the polyanion is preferably in the range of 10 to 100,000 monomer units, and more preferably in the range of 50 to 10000 from the viewpoint of solvent solubility and conductivity.

As the conductive polymer, a commercially available material can also be preferably used. For example, a conductive polymer (abbreviated as PEDOT / PSS) composed of poly (3,4-ethylenedioxythiophene) and polystyrene sulfonic acid is used in H. C. It is commercially available from Starck as the CLEVIOS series, from Aldrich as PEDOT-PSS483095, 560598, and from Nagase Chemtex as the Denartron series. In addition, polyaniline is commercially available from Nissan Chemical Industries, Ltd. as the ORMECON series.

The concentration of the conductive material in the linear liquid is preferably adjusted in order to adjust the line width of the conductive thin wire as described above. For example, it is preferable to adjust the concentration within the concentration range of 0.01 [wt%] or more and 0.5 [wt%] or less.

As the liquid containing the conductive material used when forming the line-shaped liquid, one kind or a combination of two or more kinds such as water and an organic solvent can be used.

The organic solvent is not particularly limited, but for example, alcohols such as 1,2-hexanediol, 2-methyl-2,4-pentanediol, 1,3-butanediol, 1,4-butanediol, and propylene glycol. Examples thereof include ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and dipropylene glycol monoethyl ether.

Further, the liquid containing the conductive material may contain various additives such as a surfactant.

By using a surfactant, for example, when a line-shaped liquid is formed by using a droplet ejection method such as an inkjet method, it is possible to adjust the surface tension or the like to stabilize the ejection. become. The surfactant is not particularly limited, but a silicon-based surfactant or the like can be used. Silicon-based surfactants are those in which the side chains or ends of dimethylpolysiloxane are modified with polyether. For example, KF-351A and KF-642 manufactured by Shin-Etsu Chemical Co., Ltd. and BYK347 and BYK348 manufactured by Big Chemie are commercially available. There is. The amount of the surfactant added is preferably 1% by weight or less with respect to the total amount of the liquid forming the line-shaped liquid.

Further, from the viewpoint of adjusting the shape and / or properties of the conductive thin wire, it is also preferable to perform plating treatment on the conductive thin wire. That is, it is preferable to form a metal film by plating on one or both of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode.

When plating the conductive thin wire, the film thickness of the conductive thin wire can be adjusted by adjusting the plating conditions. In particular, electrolytic plating can be preferably used from the viewpoint of preferably adjusting the film thickness.

Examples of the plating conditions include, but are not limited to, the processing time of the plating process, the concentration of plating metal ions in the plating solution, the current, and the like.

The plated metal is not particularly limited, but for example, silver, copper, nickel and the like can be preferably exemplified.

It is also preferable to perform a plurality of plating treatments on the conductive thin wire with different plating metals. For example, by first subjecting a conductive thin wire made of silver to electrolytic copper plating and then subjecting it to electrolytic nickel plating, it is possible to adjust the film thickness of the conductive thin wire and impart high conductivity and durability to the conductive thin wire. ..

Next, an example of parallel lines formed on the transparent substrate will be described with reference to FIG. In the following description, the parallel lines 32 constituting the X electrode 3 will be mainly described, but this description can also be applied to the parallel lines 42 forming the Y electrode 4.

FIG. 8 is a partially cutaway perspective view showing an example of parallel lines formed on the base material, and the cross section corresponds to a vertical cross section cut in a direction orthogonal to the forming direction of the parallel lines.

The pair of two conductive thin wires 31 and 31 constituting the parallel wire 32 do not necessarily have to be island-shaped completely independent of each other. As shown in the figure, the two conductive thin wires 31 and 31 are formed by a thin film portion 30 formed between the conductive thin wires 31 and 31 at a height lower than the height of the conductive thin wires 31 and 31. It is also preferable that it is formed as a connected continuum.

The line widths W1 and W2 of the conductive thin wires 31 and 31 constituting the parallel line 32 are preferably 10 μm or less, respectively. If it is 10 μm or less, it is usually invisible as a single thin line, which is more preferable from the viewpoint of improving transparency. Considering the stability of the conductive thin wires 31 and 31, the line widths W1 and W2 are preferably in the range of 2 μm or more and 10 μm or less, respectively. Here, the conductive thin wire constituting the Y electrode described above may have a line width of more than 10 μm in consideration of a decrease in visibility when viewed from the X electrode side.

The widths W1 and W2 of the conductive thin wires 31 and 31 mean that the height of the thinnest portion between the conductive thin wires 31 and 31 where the thickness of the conductive material is the thinnest is Z, and further, conductivity from the Z. When the protruding heights of the thin wires 31 and 31 are Y1 and Y2, the widths of the conductive thin wires 31 and 31 at half the height of Y1 and Y2 can be set. For example, when the parallel line 32 has the above-mentioned thin film portion 30, the height of the thinnest portion in the thin film portion 30 can be Z. When the height of the thinnest portion of the conductive material between the conductive thin wires 31 and 31 is 0, the line widths W1 and W2 of the conductive thin wires 31 and 31 are conductive from the surface of the transparent base material 2. The height of the thin wires 31 and 31 can be the width of the conductive thin wires 31 and 31 at half the height of H1 and H2.

Since the line widths W1 and W2 of the conductive thin wires 31 and 31 constituting the parallel wire 32 can be extremely thin as described above, a transparent base material is used from the viewpoint of securing the cross-sectional area and reducing the resistance. 2 It is desirable that the heights (also referred to as film thickness) H1 and H2 of the conductive thin wires 31 and 31 from the surface are high. Specifically, the heights H1 and H2 of the conductive thin wires 31 and 31 are preferably in the range of 50 nm or more and 5 μm or less.

From the viewpoint of improving the stability of the parallel lines 32, the H1 / W1 ratio and the H2 / W2 ratio are preferably in the range of 0.01 or more and 1 or less, respectively.

From the viewpoint of further improving the thinning of the parallel lines 32, the height Z of the thinnest portion between the conductive thin wires 31 and 31 where the thickness of the conductive material is the thinnest, specifically, the thinnest portion of the thin film portion 30. The height Z of the above is preferably in the range of 10 nm or less. Most preferably, the thin film portion 30 is provided in the range of 0 <Z ≦ 10 nm in order to achieve both transparency and stability.

In order to further improve the thinning of the parallel lines 32, the H1 / Z ratio and the H2 / Z ratio are preferably 5 or more, more preferably 10 or more, and particularly preferably 20 or more. ..

The range of the arrangement interval I of the conductive thin wires 31 and 31 is not particularly limited, and can be appropriately set by setting the formation width of the linear liquid. It is also preferable to set the arrangement interval I to a large value such as 50 μm or more, 100 μm or more, 200 μm or more, 300 μm or more, 400 μm or more, and further 500 μm or more. When forming a transparent conductive film or the like, the arrangement interval I is preferably in the range of, for example, 100 μm or more and 1000 μm or less, and more preferably 100 μm or more and 500 μm or less. The arrangement interval I of the conductive thin wires 31 and 31 can be the distance between the maximum protrusions of the conductive thin wires 31 and 31.

It is preferable to give the same shape (similar cross-sectional area) to the conductive thin wires 31 and 31 constituting the parallel lines 32 generated from one line-shaped liquid, and specifically, the conductive thin wires 31 and 31. It is preferable that the heights H1 and H2 of 31 are substantially equal values. Similarly, it is preferable that the line widths W1 and W2 of the conductive thin wires 31 and 31 have substantially the same value. In order to adjust the shape of the conductive thin wire, it is preferable to set the height (film thickness) and line width of the conductive thin wire to different values for the X electrode and the Y electrode.

The conductive thin wires 31 and 31 do not necessarily have to be completely parallel, and it is sufficient that the conductive thin wires 31 and 31 are not connected at least over a certain length J in the line segment direction. Preferably, the conductive thin wires 31, 31 are substantially parallel over at least a certain length J in the line segment direction. The length J of the conductive thin wires 31 and 31 in the line segment direction is preferably 5 times or more, more preferably 10 times or more the arrangement interval I of the conductive thin wires 31 and 31.

The length J and the arrangement interval I can be set corresponding to the formation length and formation width of the linear liquid.

It is preferable that the conductive thin wires 31 and 31 have line widths W1 and W2 sufficiently thinner than the distance between the two lines (arrangement interval I).

It is preferable that the conductive thin wires 31 and 31 forming the parallel wire 32 generated from one linear liquid are formed at the same time.

It is particularly preferable that the conductive thin wires 31 and 31 constituting the parallel wire 32 satisfy all of the following conditions (a) to (c). As a result, the pattern is less likely to be visually recognized, transparency can be improved, line segments are stabilized, and the resistance value of the pattern can be reduced.

(A) When the heights of the conductive thin wires 31 and 31 are H1 and H2 and the height of the thinnest portion between the conductive thin wires 31 and 31 is Z, 5 ≦ H1 / Z and 5 ≦ Must be H2 / Z.
(A) When the widths of the conductive thin wires 31 and 31 are W1 and W2, W1 ≦ 10 μm and W2 ≦ 10 μm.
(C) When the heights of the conductive thin wires 31 and 31 are H1 and H2, 50 nm <H1 <5 μm and 50 nm <H2 <5 μm.

The transparent base material is not particularly limited, and examples thereof include glass and plastic, and among them, plastic is preferable. As the plastic, polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, acrylic, polyester, polyamide, polycarbonate and the like are suitable. The transparent base material may have a single-layer structure or a laminated structure.

FIG. 9 shows an example of the case where the transparent base material 2 has a single-layer structure. In this case, the X electrode 3 is formed on one surface of the transparent base material 2, and then the Y electrode 4 is formed on the other surface, or the Y electrode 4 is formed on one surface of the transparent base material 2, and then the other. By forming the X electrode 3 on the surface of the touch panel sensor 1, the touch panel sensor 1 can be obtained. That is, it can be a touch panel sensor 1 in which the X electrode 3 and the Y electrode 4 are formed on both sides of the same support (transparent base material).

FIG. 10 shows an example in the case where the transparent base material 2 has a laminated structure. Such a laminated structure is composed of two supports 21 and 21 and an adhesive film 22 arranged between the supports 21 and 21. When forming such a laminated structure, the X electrode 3 is formed on the transparent first support 21, the Y electrode is formed on the transparent second support 21, and then the supports 21, 21 are formed. The touch panel sensor 1 can be obtained by sticking them together via a transparent adhesive film 22.

When a laminated structure is used, there is an advantage that it can be manufactured relatively easily as compared with the case of a single-layer structure in which electrodes need to be formed on both sides of the same base material. Whether a single-layer structure or a laminated structure is used, the boundary between the X electrode and the Y electrode can be made difficult to see by adjusting the shape and / or properties of the conductive thin wire as described above.

Examples of the present invention will be described below, but the present invention is not limited to such examples.

(Example 1)
In Example 1, the line width of the conductive thin wire was adjusted.

<Formation of X electrode>
Using line heads provided on the upstream side and the downstream side of the PET (polyethylene terephthalate) film (thickness 50 μm) unwound from the roll-shaped wound body in the transport direction, a plurality of parallel lines are combined on the PET film. X electrode was formed. The line head is configured by combining a plurality of inkjet heads (Piezo heads (appropriate amount of standard liquid 42pl) manufactured by Konica Minolta Co., Ltd.) in a direction orthogonal to the transport direction.

Specifically, first, using the upstream line head, water-based silver nanoink (volume average particle diameter 20 nm, solid content concentration 0.8 wt%, surface tension 27 mN / m) is applied onto the transparent substrate, and 3 A plurality of line-shaped liquids of this set were formed. When each line-shaped liquid was dried, the drying conditions were controlled and silver nanoparticles were selectively deposited on both edges to form a set of two parallel lines. The arrangement interval I of the conductive thin wires was set to 250 μm. A plurality of first thin wire sets (composed of 6 conductive thin wires) composed of 3 sets of parallel wires were arranged side by side at predetermined intervals.

Next, using the downstream line head, a second wire set intersecting the first wire set was formed in the same manner as the first wire set, and an X electrode similar to that shown in FIG. 3 was formed. At this time, the concentration of the silver nanoparticles of the ink at the time of forming the X electrode was changed so that the line width of the conductive thin line became the value shown in Table 1, and the samples were prepared as Samples 1-1 to 1-5.

<Formation of Y electrode>
A Y electrode similar to that shown in FIG. 4 was formed on the PET film in the same manner as the X electrode. At this time, the concentration of the silver nanoparticles of the ink at the time of forming the Y electrode was changed so that the line width of the conductive thin wire became the value shown in Table 1, and the samples were prepared as Samples 1-1 to 1-5.

<Lasting>
The PET film on which the X electrode was formed and the PET film on which the Y electrode was formed were bonded together via an adhesive film to obtain a touch panel sensor having a laminated structure of transparent substrates as shown in FIG. .. As shown in FIG. 2, this touch panel sensor has a first thin wire set constituting the X electrode and a first thin wire set constituting the Y electrode when the transparent base material is seen through by adjusting the position at the time of bonding. Are arranged alternately so that they do not overlap each other. Similarly, when the transparent substrate is viewed through, the second wire set constituting the X electrode and the second wire set constituting the Y electrode are alternately arranged so as not to overlap each other.

<Evaluation method>
The obtained touch panel sensor (Samples 1-1 to 1-5) was observed from the X electrode side at a distance of 30 cm, and the difficulty in visually recognizing the boundary between the X electrode and the Y electrode was evaluated according to the following evaluation criteria. The results are shown in Table 1.

[Evaluation criteria]
The following five grades were used.
5: The boundary is almost invisible 4: The boundary is very slightly visible 3: The boundary is slightly visible 2: The boundary is visible 1: The boundary is clearly visible

In the above evaluation criteria, 3 to 5 are practically preferable.

<Evaluation>
From Table 1, by making the line width of the conductive thin wire constituting the X electrode smaller than the line width of the conductive thin wire constituting the Y electrode, the boundary between the X electrode and the Y electrode can be suitably made difficult to see. Recognize.

(Example 2)
In Example 2, the line width of the conductive thin wire was adjusted in the same manner as in Example 1 except that a single-layer structure made of PET film was used as the transparent base material.

Specifically, after forming an X electrode on one surface of the PET film, a Y electrode was formed on the other surface of the PET film to obtain a touch panel sensor as shown in FIG.

As a result of evaluating the visibility difficulty in the same manner as in Example 1, even when a single-layer structure is used as the transparent base material, the line width of the conductive thin wire constituting the X electrode is changed to the conductive thin wire constituting the Y electrode. It was confirmed that the boundary between the X electrode and the Y electrode can be suitably made difficult to see by making it smaller than the line width of.

(Example 3)
In Example 3, the reflectance of the conductive thin wire was adjusted.

In Example 1, the line width of the conductive thin wire was kept constant (6 μm), the volume average particle diameter of the silver nanoparticles was changed, and the reflectance was set to the value shown in Table 2, and the samples 3-1 to 3 were set. A -5 touch panel sensor was obtained.

Table 2 shows the results of evaluating the visibility difficulty in the same manner as in Example 1.

<Evaluation>
From Table 2, by making the reflectance of the conductive thin wire constituting the X electrode smaller than the reflectance of the conductive thin wire constituting the Y electrode, the boundary between the X electrode and the Y electrode can be suitably made difficult to see. Recognize. The reflectance shown in Table 2 is a value obtained from the spectral reflectance measured on the surface on which the conductive thin wire to be measured is formed using a spectrophotometer.

(Example 4)
In Example 4, the film thickness of the conductive thin wire was adjusted.

The conductive thin wires constituting the X electrode and / or the Y electrode of the touch panel sensor of Sample 1-1 obtained in Example 1 were subjected to electrolytic copper plating treatment. The touch panel sensors of Samples 4-1 to 4-5 were obtained by changing the plating conditions and changing the film thickness of the copper to be plated so that the film thickness of the conductive thin wire became the value shown in Table 3.

Table 3 shows the results of evaluating the visibility difficulty in the same manner as in Example 1.

<Evaluation>
From Table 2, by making the film thickness of the conductive thin wire constituting the X electrode smaller than the film thickness of the conductive thin wire constituting the Y electrode, the boundary between the X electrode and the Y electrode can be suitably made difficult to see. Recognize.

(Example 5)
In Example 5, the film thickness of the conductive thin wire was adjusted in the same manner as in Example 4, except that a single-layer structure made of PET film was used as the transparent base material.

Specifically, after forming an X electrode on one surface of the PET film, a Y electrode was formed on the other surface of the PET film to obtain a touch panel sensor as shown in FIG.

As a result of evaluating the visibility difficulty in the same manner as in Example 1, even when a single-layer structure is used as the transparent base material, the thickness of the conductive thin wire constituting the X electrode is set to the thickness of the conductive thin wire constituting the Y electrode. It was confirmed that the boundary between the X electrode and the Y electrode can be suitably made difficult to see by making the thickness smaller than the thickness of.

1: Touch panel sensor 2: Transparent base material 21: Support 22: Adhesive film 3: X electrode 31: Conductive thin wire 32: Conductive parallel thin wire (parallel wire)
33a, 33b: Fine wire set 4: Y electrode 41: Conductive thin wire 42: Conductive parallel thin wire (parallel wire)
43a, 43b: Fine wire set 5: Intersection 6: Line-shaped liquid

Claims (23)

A touch panel sensor having an X electrode on one surface of a transparent base material, a Y electrode on the other side of the transparent base material, and a display arranged on the Y electrode side.
The X electrode and the Y electrode are formed by combining a plurality of sets of conductive parallel thin wires each consisting of a set of two conductive thin wires, and form the X electrode when the transparent substrate is viewed through. The conductive thin wire and the conductive thin wire constituting the Y electrode are arranged so as not to overlap each other as a line segment.
Wherein the X electrode side so as to reduce the difference between the visibility of the Y electrode and the visibility of the X electrode when viewed the touch panel sensor, and the conductive fine wires constituting the X electrode, the Y electrode A touch panel sensor in which the shapes and / or properties of the respective conductive thin wires are made different from each other in a portion where the constituent conductive thin wires do not overlap each other as a line segment, so that the visibility of the X electrode is lowered. The X electrode intersects a first wire set in which conductive wires parallel to each other are arranged side by side at predetermined intervals and a second wire set in which conductive wires parallel to each other are arranged in parallel at predetermined intervals. It is composed by arranging multiple pieces in a mesh like
The Y electrode intersects a first wire set in which conductive wires parallel to each other are arranged side by side at predetermined intervals and a second wire set in which conductive wires parallel to each other are arranged in parallel at predetermined intervals. It is composed by arranging multiple pieces in a mesh like
When the transparent substrate is viewed through, the first wire set constituting the X electrode and the first wire set constituting the Y electrode are parallel to each other and do not overlap each other. The second wire set that is alternately arranged and constitutes the X electrode and the second wire set that constitutes the Y electrode are arranged alternately so as to be parallel to each other and not to overlap each other. The touch panel sensor according to claim 1. The shape of the conductive thin wire forming the X electrode and the conductive thin wire forming the Y electrode is a line width, and the line width of the conductive thin wire forming the X electrode and the Y electrode are used. The touch panel sensor according to claim 1 or 2, wherein the line width of the constituent thin conductive wire is different. The touch panel sensor according to claim 3, wherein the line width of the conductive thin wire constituting the X electrode is smaller than the line width of the conductive thin wire constituting the Y electrode. The property of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the reflectance, and the reflectance of the conductive thin wire constituting the X electrode and the Y electrode are used. The touch panel sensor according to claim 1 or 2, wherein the reflectance of the constituent thin conductive wire is different from that of the touch panel sensor. The touch panel sensor according to claim 5, wherein the reflectance of the conductive thin wire constituting the X electrode is smaller than the reflectance of the conductive thin wire constituting the Y electrode. The shape of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the film thickness, and the film thickness of the conductive thin wire constituting the X electrode and the Y electrode are used. The touch panel sensor according to claim 1 or 2, wherein the thickness of the constituent thin conductive wire is different. The touch panel sensor according to claim 7, wherein the film thickness of the conductive thin wire constituting the X electrode is smaller than the film thickness of the conductive thin wire constituting the Y electrode. The touch panel sensor according to any one of claims 1 to 8, wherein the support on which the X electrode is formed and the support on which the Y electrode is formed are bonded together. The touch panel sensor according to any one of claims 1 to 9, wherein the X electrode and the Y electrode are formed on both sides of the same support. The touch panel sensor according to any one of claims 1 to 10, wherein the conductive thin wire constituting one or both of the X electrode and the Y electrode includes a metal film formed by plating. A method for manufacturing a touch panel sensor in which an X electrode is provided on one surface of a transparent base material, a Y electrode is provided on the other side of the transparent base material, and a display is arranged on the Y electrode side.
The X electrode and the Y electrode are formed by combining a plurality of sets of conductive parallel thin wires each consisting of a set of two conductive thin wires, and the conductive thin wires constituting the X electrode and the Y electrode are formed. The conductive thin wires are arranged so as not to overlap each other as a line segment when the transparent base material is viewed through.
Wherein the X electrode side so as to reduce the difference between the visibility of the Y electrode and the visibility of the X electrode when viewed the touch panel sensor, and the conductive fine wires constituting the X electrode, the Y electrode A method for manufacturing a touch panel sensor in which the shapes and / or properties of the respective conductive thin wires are made different from each other in a portion where the constituent conductive thin wires do not overlap each other as a line segment, so that the visibility of the X electrode is lowered. The X electrode intersects a first wire set in which conductive wires parallel to each other are arranged side by side at predetermined intervals and a second wire set in which conductive wires parallel to each other are arranged in parallel at predetermined intervals. By arranging multiple pieces in a mesh like
The Y electrode intersects a first wire set in which conductive wires parallel to each other are arranged side by side at predetermined intervals and a second wire set in which conductive wires parallel to each other are arranged in parallel at predetermined intervals. By arranging multiple pieces in a mesh like
When the transparent base material is seen through, the first wire set constituting the X electrode and the first wire set constituting the Y electrode are in a parallel relationship with each other and alternate so as not to overlap each other. The second wire set forming the X electrode and the second wire set forming the Y electrode are arranged in parallel with each other and overlap each other when the transparent base material is viewed through. The method for manufacturing a touch panel sensor according to claim 12, wherein the touch panel sensors are arranged alternately so as not to be present. The shape of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is a line width, and the line width of the conductive thin wire constituting the X electrode and the Y electrode The method for manufacturing a touch panel sensor according to claim 12 or 13, wherein the line width of the conductive thin wire constituting the above is different. The touch panel sensor according to claim 14, wherein the X electrode and the Y electrode are provided so that the line width of the conductive thin wire constituting the X electrode is smaller than the line width of the conductive thin wire constituting the Y electrode. Manufacturing method. The property of the conductive thin wire constituting the X electrode and the conductive thin wire constituting the Y electrode is the reflectance, and the reflectance of the conductive thin wire constituting the X electrode and the Y electrode are used. The method for manufacturing a touch panel sensor according to claim 12 or 13, wherein the reflectance of the constituent thin conductive wire is different. The touch panel sensor according to claim 16, wherein the X electrode and the Y electrode are provided so that the reflectance of the conductive thin wire constituting the X electrode is smaller than the reflectance of the conductive thin wire constituting the Y electrode. Manufacturing method. The shape of the conductive thin wire forming the X electrode and the conductive thin wire forming the Y electrode is the film thickness, and the film thickness of the conductive thin wire forming the X electrode and the Y electrode are used. The method for manufacturing a touch panel sensor according to claim 12 or 13, wherein the film thickness of the constituent conductive thin wire is different. The touch panel sensor according to claim 18, wherein the X electrode and the Y electrode are provided so that the thickness of the conductive thin wire constituting the X electrode is smaller than the thickness of the conductive thin wire constituting the Y electrode. Manufacturing method. The method for manufacturing a touch panel sensor according to any one of claims 12 to 19, wherein the support on which the X electrode is formed and the support on which the Y electrode is formed are bonded together. The method for manufacturing a touch panel sensor according to any one of claims 12 to 20, wherein the X electrode and the Y electrode are formed on both sides of the same support. When the line-shaped liquid containing the conductive material applied on the transparent substrate is dried, the conductive material is selectively deposited on both edges of the line-shaped liquid to form the X electrode and the Y electrode. The manufacture of the touch panel sensor according to any one of claims 12 to 21, which forms a conductive parallel thin wire constituting the above. The method for manufacturing a touch panel sensor according to any one of claims 12 to 22, wherein a metal film is formed by plating on the conductive thin wire constituting one or both of the X electrode and the Y electrode.

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