WO2020031500A1 - Wiring body, wiring board, and touch sensor - Google Patents

Abstract

A wiring body 10 is provided with an insulating part 20 and a conducting part 30 provided on the insulating part 20, wherein: the conducting part 30 includes a mesh-like electrode pattern 31 having a plurality of intercrossed fine wires 32, 33; the plurality of fine wires 32, 33 include first fine wires 32 extending as a whole in an m direction; each first fine wire 32 has a zigzag shape formed by repeating a unit shape 323 that includes a first part 321 and a second part 322; the first part 321 extends in a p direction different from the m direction; the second part 322 is connected to an end of the first part 321 and extends in a q direction different from the m direction and p direction; and the first part 321 is longer than the second part 322.

Description

Wiring body, wiring board, and touch sensor

The present invention relates to a wiring body, a wiring board, and a touch sensor.
For the designated countries for which incorporation by reference to the literature is permitted, the contents described in Japanese Patent Application No. 2018-151802 filed on August 10, 2018 in Japan are incorporated herein by reference, and the description of this specification is incorporated herein by reference. Part of

As a mesh-shaped metal conductive layer provided on a transparent substrate, there is known a mesh-shaped metal conductive layer in which the line width of the mesh of the metal conductive layer is changed to suppress the occurrence of moire at the time of attachment to a display (for example, Patent Document 1).

JP 2009-252868 A

(4) When the line width of the mesh is reduced in the metal conductor layer for improving the visibility, the portion having the minimum line width is further reduced, and there is a possibility that disconnection may occur in the portion.

The problem to be solved by the present invention is to provide a touch panel capable of suppressing the occurrence of disconnection while suppressing the occurrence of moire.

[1] A wiring body according to the present invention includes an insulating portion, and a conductor portion provided on the insulating portion, wherein the conductor portion includes a mesh-like electrode pattern having a plurality of thin wires crossing each other. The plurality of thin lines include a first thin line extending in a first direction as a whole, and the first thin line has a zigzag shape that repeats a unit shape including a first portion and a second portion. The first portion extends in a second direction different from the first direction, and the second portion is connected to an end of the first portion, , Extending in a third direction different from the first and second directions, and the first portion is a wiring body longer than the second portion.

[2] In the above invention, the following formulas (1) and (2) may be satisfied.
0 ° <θ ₁ <45 ° (1)
θ ₁ −90 ° <θ ₂ <−θ ₁ (2)
However, in the above equations (1) and (2), θ ₁ is an angle formed by the second direction with respect to the first direction, and θ ₂ is the angle formed by the first direction with respect to the first direction. The angle formed by the third direction.

[3] In the above invention, the following formula (3) may be satisfied.
w ≦ L ₀ ≦ 10 × w (3)
However, in the above (3), w is a width of the first thin line, L ₀ is the length of the unit shape.

[4] In the above invention, the following formula (4) may be satisfied.
σL ₀ ≦ 5.0 μm (4)
However, in the above equation (4), σL ₀ is the standard deviation of the length L ₀ of the unit shape.

[5] In the above invention, the insulating portion may include a convex portion provided with the first fine wire.

[6] A wiring board according to the present invention is a wiring board including the above wiring body and a support for supporting the wiring body.

[7] A touch sensor according to the present invention is a touch sensor including the above-described wiring board.

According to the present invention, a first thin line is formed by repeating a unit shape including a first portion extending in a second direction and a second portion extending in a third direction. Since it has a shape, generation of moire can be suppressed. Further, according to the present invention, since it is not necessary to make the width of the first fine line thinner than necessary, the occurrence of disconnection can also be suppressed.

FIG. 1 is an exploded perspective view showing a touch sensor according to the embodiment of the present invention. FIG. 2 is a plan view showing a first conductor section and a first insulating section in the embodiment of the present invention. FIG. 3 is a cross-sectional view showing a first thin line in the embodiment of the present invention, and is a cross-sectional view corresponding to line III-III in FIG. FIG. 4 is an enlarged plan view showing a first electrode pattern according to the embodiment of the present invention, and is an enlarged view of a portion IV in FIG. FIG. 5 is an enlarged plan view showing a first thin line in the embodiment of the present invention, and is an enlarged view of a portion V in FIG. 6A to 6E are cross-sectional views illustrating a method for manufacturing a touch sensor according to an embodiment of the present invention. FIG. 7 is an enlarged plan view of an intaglio used when manufacturing a touch sensor in the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing the touch sensor according to the present embodiment. The touch sensor 1 illustrated in FIG. 1 is a capacitive touch panel sensor, and is used as an input device having a function of detecting a touch position, for example, in combination with a display device (not shown). The display device is not particularly limited, and a liquid crystal display, an organic EL display, electronic paper, or the like can be used. The touch sensor 1 has a detection electrode and a drive electrode (a first electrode pattern 31 and a second electrode pattern 51 described later) arranged so as to correspond to a display area of the display device. A predetermined voltage is periodically applied between the electrodes from an external circuit (not shown).

In such a touch sensor 1, for example, when an operator's finger (outer conductor) F approaches the touch sensor 1, a capacitor (electric capacity) is formed between the outer conductor F and the touch sensor 1, and two capacitors are formed. The electrical state between the electrodes changes. The touch sensor 1 can detect an operation position of an operator based on an electrical change between two electrodes.

As shown in FIG. 1, the touch sensor 1 includes a wiring board 2 including a support 5 and a wiring body 10, and a cover member 70 attached to one surface of the wiring board 2. The wiring board 2 of the present embodiment is configured to have transparency (light transmission) as a whole in order to ensure the visibility of the display device. The “wiring body 10” in the present embodiment corresponds to an example of the “wiring body” in the present invention, and the “support 5” in the present embodiment corresponds to an example of the “support” in the present invention. The “wiring board 2” in the embodiment corresponds to an example of the “wiring board” in the present invention.

The support 5 has a rectangular outer shape and is made of a transparent material. Examples of a material constituting the support 5 include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide resin (PI), polyetherimide resin (PEI), polycarbonate (PC), and polyether ether ketone ( PEEK), liquid crystal polymer (LCP), cycloolefin polymer (COP), silicone resin (SI), acrylic resin, phenol resin, epoxy resin, glass, and the like. The wiring body 10 is attached to the support 5, and the wiring body 10 is supported by the support 5. In this case, it is preferable that the support 5 has such a rigidity that the support 5 can support the wiring body 10.

As shown in FIG. 1, the wiring body 10 includes a first insulating portion 20, a first conductor portion 30, a second insulating portion 40, a second conductor portion 50, and a third insulating portion 60. And The wiring body 10 is configured to have transparency (light transmission) as a whole in order to ensure the visibility of the display device.

In the present embodiment, the first conductor portion 30 is disposed on the first insulating portion 20, and the second conductor portion 50 is disposed on the second insulating portion 40. The second insulating section 40 is laminated on the section 20. That is, while the first conductor part 30 is arranged on one side of the second insulating part 40, the second conductor part 50 is arranged on the other side of the second insulating part 40. In addition, the first conductor 30 and the second conductor 50 face each other via the second insulating section 40. The second conductor 50 is arranged at a position closer to the side where the external conductor F contacts than the first conductor 30. That is, the first conductor portion 30 is located on the display device side, and the second conductor portion 50 is located on the operator side (the surface contacting the external conductor F). When the “first insulating section 20” in the present embodiment corresponds to an example of the “insulating section” in the present invention, the “first conductor section 30” in the present embodiment corresponds to the “conductor section” in the present invention. This corresponds to an example.

FIG. 2 is a plan view showing a first conductor portion and a first insulating portion in the present embodiment. FIG. 3 is a cross-sectional view showing a first thin line in the present embodiment. Corresponding cross-sectional views, FIG. 4 is an enlarged plan view showing a first electrode pattern in the present embodiment, an enlarged view of a portion IV in FIG. 2, and FIG. 5 is an enlarged plan view showing a first fine line in the present embodiment. FIG. 5 is an enlarged view of a portion V in FIG.

As shown in FIGS. 1 and 2, the first insulating portion 20 has a rectangular outer shape, and holds the first conductor portion 30 on one main surface. The first insulating section 20 is interposed between the first conductor section 30 and the support 5, and fixes the first conductor section 30 and the support 5 by bonding each other.

As shown in FIG. 3, the first insulating portion 20 has a substantially flat flat portion 21 and a convex portion 22 protruding toward the conductor portion 30 (upward in FIG. 3). I have. The flat portion 21 has a substantially uniform thickness as a whole. The convex portion 22 is provided on the flat portion 21 so as to correspond to the first conductive portion 30, and linearly extends so as to correspond to the first electrode pattern 31 and the first lead-out wiring pattern 35. are doing. On the other hand, the conductor portion 30 is not provided on the flat portion 21.

The first insulating portion 20 is made of a resin material having transparency and electrical insulation. Examples of the transparent resin material include, for example, an epoxy resin, an acrylic resin, a polyester resin, a urethane resin, a vinyl resin, a silicone resin, a phenol resin, a UV curable resin such as a polyimide resin, a thermosetting resin, or a thermoplastic resin. And the like.

及 び As shown in FIGS. 1 and 2, the first conductor 30 is provided on the first insulating part 20 and is held by the first insulating part 20. The first conductor 30 includes a plurality of conductive particles and a binder resin that binds the conductive particles. The first conductor portion 30 is formed by printing and hardening a conductive paste. Specific examples of the conductive paste include those formed by mixing conductive particles and a binder resin with water, a solvent, and various additives. Note that the binder resin may be omitted from the conductive paste.

Specific examples of the conductive particles include metal materials such as silver, copper, nickel, tin, bismuth, zinc, indium, and palladium, graphite, carbon black (furnace black, acetylene black, Ketjen black), carbon nanotube, and carbon nanotube. Carbon-based materials such as nanofibers can be used. Note that a metal salt may be used as the conductive particles. Specific examples of the metal salt include the above-mentioned metal salts. Specific examples of the binder resin include an acrylic resin, a polyester resin, an epoxy resin, a vinyl resin, a urethane resin, a phenol resin, a polyimide resin, a silicone resin, a fluorine resin, and the like. Specific examples of the solvent include α-terpineol, butyl carbitol acetate, butyl carbitol, 1-decanol, butyl cellosolve, diethylene glycol monoethyl ether acetate, tetradecane, and the like.

1) As shown in FIGS. 1 and 2, the first conductor portion 30 includes a plurality of first electrode patterns 31 and a plurality of first lead-out wiring patterns 35. The first electrode pattern 31 and the first lead-out wiring pattern 35 are formed on the convex portion 22 of the first insulating portion 20 and are located on the same plane (see FIG. 3). The number of the first electrode patterns 31 is not particularly limited and can be set arbitrarily. The number of the first lead-out wiring patterns 35 is not particularly limited, either, and depends on the number of the first electrode patterns 31. Is set.

Each first electrode pattern 31 is a band-shaped pattern extending in the X direction in the figure, and the plurality of first electrode patterns 31 are arranged in the Y direction in the figure. Each of the first electrode patterns 31 has a mesh shape formed by intersecting a plurality of fine wires 32 and 33 with each other. The mesh shape includes a rectangular unit mesh 311 that is repeatedly arranged. Have.

(3) The first fine wire 32 is provided on the convex portion 22 of the first insulating portion 20, as shown in FIG. By forming the first fine wires 32 on the convex portions 22 in this manner, the strength of the first fine wires 32 can be improved. The first fine wire 32 has a tapered shape that becomes gradually narrower as the distance from the first insulating portion 20 increases when a cross section of the fine wire 32 cut in the width direction is viewed. In the first fine wire 32, the first contact surface 32a that contacts the convex portion 22 of the first insulating portion 20 is relatively positioned with respect to the second contact surface 32b that contacts the second insulating portion 40. It is rough. Specifically, the surface roughness Ra of the first contact surface 32a is 0.1 μm to 3 μm, whereas the surface roughness Ra of the second contact surface 32b is 0.001 μm to 1.0 μm. It has become. The surface roughness Ra is “arithmetic mean roughness Ra” defined by the JIS method (JIS B0601 (revised on March 21, 2013)). Although not particularly shown, the second fine wire 33 and other fine wires of the first lead-out wiring pattern 35 and the second conductor portion 50 also have the same cross-sectional shape as the first fine wire 32 shown in FIG. have.

In the present embodiment, as shown in FIGS. 2 and 4, each first thin line 32 as a whole intersects with a direction (X direction in the drawing) in which the first electrode pattern 31 extends (X direction). Hereinafter, also referred to as “m direction”). The plurality of first fine lines 32 are arranged at substantially equal intervals in a direction intersecting with the m direction (hereinafter, also referred to as “n direction”). The m direction in the present embodiment corresponds to an example of the first direction in the present invention.

The angle of intersection α in the m direction with respect to the X direction is preferably larger than 0 ° and equal to or smaller than 40 ° (0 ° <α ≦ 40 °). Although not particularly limited, for example, the intersection angle α in the m direction with respect to the X direction is 30 °, the intersection angle in the n direction with respect to the m direction is 90 °, and the intersection angle β in the n direction with respect to the X direction is 120. °.

Specifically, as shown in FIGS. 4 and 5, the first fine line 32 is formed in a zigzag shape by repeating a plurality of unit shapes 323 each having a bent portion 324. Each unit shape 323 is composed of first and second portions 321 and 322 interconnected by a bent portion 324. In each unit shape 323, a second portion 322 is connected to an end of the first portion 321, and an end of the second portion 322 is connected to a first portion 321 of an adjacent unit shape 323. ing. The first and second portions 321 and 322 have substantially the same width, specifically, have a width of 0.5 μm to 20 μm. Thus, the unit shape 323 has a substantially constant width between the starting point P _S and the end point P _E, consequently, the first thin line 32 is substantially constant width over its entire length have. In addition, “substantially the same” and “substantially constant” mean that the line width of the first fine line 32 is ± 5% or less, preferably ± 2.5%, relative to the average value of the line width. Or less, more preferably ± 1.25% or less.

In the present embodiment, the length L1 of the _first portion 321 is longer than the length L2 of the _second portion 322. Is not particularly limited, the length L ₁ of the first portion 321 is the length L ₂ of the second portion 322 preferably satisfy the following expression (5). In the following equation (5), _{L 1} is the length of the first portion 321 along the m direction, _{L 2} is the length of the second portion 322 along the m direction.

1/10 × L ₁ ≦ L ₂ ≦ 1/2 × L ₁ (5)

Further, while the first portion 321 extends along the p direction, the second portion extends along the q direction, and the first and second portions 321 and 322 extend. The orientations are different from each other (θ ₁ ≠ −θ ₂ ). Specifically, the first and second portions 321 and 322 are formed such that the p direction and the q direction satisfy the following equations (6) and (7). By the following (6) and (7) below is satisfied, it is possible to reduce the width L ₃ of the unit shapes 323 along the n direction, the first thin line 32 to reduce the possibility that is visually recognized be able to.

0 ° <θ ₁ <45 ° (6)
θ ₁ −90 ° <θ ₂ <−θ ₁ (7)

In the above equations (6) and (7), θ ₁ is the angle between the m direction and the p direction, and θ ₂ is the angle between the m direction and the q direction. However, in the above (6) and (7), the rotational direction of the acute angle side from m direction to the p direction (direction of an arrow indicating the theta ₁ in clockwise (FIG. 5)) to a positive angle expressed, expresses the opposite rotational direction (counterclockwise in FIG. 5 (direction of an arrow indicating the theta ₂ in this figure)) at a negative angle to the p direction from the m direction. In the present embodiment, the virtual straight line VL ₁ which extends along the m direction, passes through both of the starting point P _S and the end point P _E of the unit shape 323. The p direction in the present embodiment corresponds to an example of a second direction in the present invention, and the q direction in the present embodiment corresponds to an example of a third direction in the present invention.

Further, in the present embodiment, the width w of the first fine wire 32, the length L ₀ of the unit shapes 323 along the m direction, satisfies the equation (8) below. However, as shown in (9) below, the length _{L 0} of the unit shape 323 is the sum of the length _{L 2} of the length _{L 1} and the second portion 323 of the first portion 322 of the above . In the following expression (8), when L ₀ is equal to or more than w, it is possible to suppress a decrease in visibility due to the first thin line 32 being relatively thicker than the length L ₀ of the unit shape 323. . On the other hand, when L ₀ is equal to or less than 10 × w in the following expression (8), the regularity of the overlap between the electrode pattern 31 and the sub-pixel or black matrix of the display device can be further reduced.

w ≦ L ₀ ≦ 10 × w (8)
L ₀ = L ₁ + L ₂ (9)

Further, in the present embodiment, the length L ₀ of the unit shapes 323 along the m direction is set so as to satisfy the following equation (10). In the following expression (10), σL ₀ is the standard deviation of the length L ₀ of all the unit shapes 323 of the single first fine line 32.

σL ₀ ≦ 5.0 μm (10)

Further, in the present embodiment, the length L ₀ of the unit shape 323 along the m direction and the pitch P of the unit mesh 311 of the first electrode pattern 31 along the m direction are given by the following expression (11). It is preferable to satisfy the following expression (12), and it is more preferable to satisfy the following expression (13). Although not particularly limited, for example, the length L ₀ of the unit shape 323 is 10 μm, and the pitch P of the unit mesh 311 is 200 μm. As shown in FIG. 4, the pitch P is the distance between the centers of the thin lines 33 when they are adjacent to each other, and the distance between the virtual straight lines VL2 of the _second thin lines 33 along the m direction. . This virtual straight line VL ₂ is set in the same manner as the virtual straight line VL ₁ of the first thin line 32 described above.

5 × L ₀ ≦ P ≦ 200 × L ₀ (11)
15 × L ₀ ≦ P ≦ 150 × L ₀ (12)
20 × L ₀ ≦ P ≦ 100 × L ₀ (13)

As shown in FIG. 4, each of the second fine lines 33 also has a zigzag shape extending in the n direction as a whole, and the plurality of second fine lines 33 are arranged at substantially equal intervals in the m direction. Are lined up. The second fine wire 33 is formed by repeating a unit shape 333 composed of the first and second portions 331 and 332 connected to each other by the bent portion 334, and is formed by the first fine wire 32 described above. And have basically the same shape. Note that the first thin line 32 and the second thin line 33 do not have to be substantially orthogonal.

As shown in FIGS. 1 and 2, one end of the first lead-out wiring pattern 35 is connected to one end in the longitudinal direction of each first electrode pattern 31. The other end of each first lead-out wiring pattern 35 extends to the edge of the wiring body 10. The other end of the first extraction wiring pattern 35 is electrically connected to an external circuit.

As shown in FIG. 1, the second insulating portion 40 has a rectangular outer shape and is made of a transparent resin material. As the transparent resin material, for example, the same material as the resin material forming the first insulating portion 20 can be used.

The second insulating section 40 is provided on the first insulating section 20 so as to cover the first conductor section 30. The second insulating portion 40 has a convex portion corresponding to the second conductor portion 50, similarly to the first insulating portion 20 described above (see FIG. 3). Further, a cutout portion 41 is formed in the second insulating portion 40. The other end of the first extraction wiring pattern 35 is exposed from the notch 41.

The second conductor 50 is provided on the second insulating part 40 and is held by the second insulating part 40. The second conductor portion 50 is formed by printing and curing a conductive paste. As a specific example of the conductive paste, the same as the conductive paste forming the first conductor portion 30 can be exemplified.

(1) As shown in FIG. 1, the second conductor 50 includes a plurality of second electrode patterns 51 and a plurality of second lead wiring patterns 55. The second electrode pattern 51 and the second lead wiring pattern 55 are provided on a convex portion formed on the second insulating section 40 and are located on the same plane (see FIG. 3). The number of the second electrode patterns 51 is not particularly limited and can be set arbitrarily. The number of the second lead wiring patterns 55 is not particularly limited, either, and depends on the number of the second electrode patterns 51. Is set.

Each second electrode pattern 51 is a band-shaped pattern extending in the Y direction in the figure. Each second electrode pattern 51 has a mesh shape formed by intersecting a plurality of fine lines 52 and 53 with each other. The plurality of second electrode patterns 51 are arranged in the X direction in the drawing, and intersect with the first electrode patterns 31 when the touch sensor 1 is viewed from above.

The first thin line 52 of the second electrode pattern 51 has a zigzag shape extending in the m direction as a whole, like the first thin line 32 of the first electrode pattern 31 described above. Are arranged at substantially equal intervals in the n direction. The second fine line 53 of the second electrode pattern 51 also has a zigzag shape extending in the n direction as a whole similarly to the second fine line 33 of the first electrode pattern 31 described above. The second fine lines 53 are arranged at substantially equal intervals in the m direction.

The third insulating portion 60 has a rectangular outer shape and is made of a transparent resin material. As the transparent resin material, for example, the same resin material as the resin material forming the first insulating portion 20 can be used.

The third insulating section 60 is provided on the second insulating section 40 so as to cover the second conductor section 50. A cutout portion 61 is formed in the third insulating portion 60. The other end of the second lead wiring pattern 55 is exposed from the notch 61. The notch 61 overlaps the notch 41 of the second insulating portion 40, and the other end of the first lead-out wiring pattern 35 is also exposed from the notch 61.

The cover member 70 is attached to the wiring body 10 via the third insulating part 60. As shown in FIG. 1, the cover member 70 includes a transparent portion 71 that can transmit visible light, and a shielding portion 72 that blocks visible light. The transparent part 71 is formed in a rectangular shape, and the shielding part 72 is formed in a rectangular frame shape around the transparent part 71. Note that the cover member 70 has an adhesive layer (not shown) on the surface on the third insulating portion 60 side.

と し て As the transparent material forming the cover member 70, the same material as the above-described material forming the support 5 can be used. The shielding portion 72 is formed by applying, for example, black ink to the outer peripheral portion of the back surface of the cover member 70. In the present embodiment, as shown in FIG. 1, the outer conductor F (finger F) contacts the cover member 70.

カ バ ー The cover member 70 may have a rigidity enough to support the wiring body 10. In this case, the cover member 70 corresponds to an example of the support in the present invention. In this case, the above-mentioned support 5 may be omitted.

As described above, in the present embodiment, the first thin line 32 has a zigzag shape formed by repeating the unit shape 323 including the first and second portions 321 and 322, and the first portion 321 The second portions 322 extend in mutually different directions. For this reason, the regularity of the overlap between the sub-pixels or the black matrix of the display device and the first electrode pattern 31 is reduced as compared with the linear thin line, so that the occurrence of moiré that occurs periodically is suppressed. Can be.

In addition, in the present embodiment, the occurrence of moiré is suppressed by changing the shape of the first fine wire 32 to the above-described zigzag shape instead of changing the width of the fine wire. For this reason, since it is not necessary to make the width of the first fine line 32 smaller than necessary, the occurrence of disconnection of the first fine line 32 can be suppressed.

Similarly, the second fine wires 33 and the fine wires 52 and 53 of the second electrode pattern 51 also have a zigzag shape, so that it is possible to suppress the occurrence of disconnection while suppressing the occurrence of moire.

Also, in the present embodiment, since the first fine wire 32 has the zigzag shape as described above, the surface area of the first fine wire 32 increases. For this reason, the contact area between the first fine wire 32 and the second insulating portion 40 increases, so that the occurrence of separation at the interface between the first fine wire 32 and the second insulating portion 40 can be suppressed. .

Similarly, the second fine wire 33 has a zigzag shape, so that it is possible to suppress the occurrence of separation at the interface between the second fine wire 33 and the second insulating portion 40. Also, since the thin wires 52, 53 of the second electrode pattern 51 also have a zigzag shape, the contact area between the thin wires 52, 53 and the third insulating portion 60 increases. The occurrence of separation at the interface with the third insulating section 60 can be suppressed.

Next, a method of manufacturing the above-described touch sensor 1 will be described with reference to FIGS. 6A to 6E are cross-sectional views illustrating a method for manufacturing a touch sensor according to the present embodiment, and FIG. 7 is an enlarged plan view of an intaglio used when manufacturing the touch sensor according to the present embodiment.

First, as shown in FIG. 6A, an intaglio 100 in which a concave portion 101 having a shape corresponding to the first conductive portion 30 is formed is prepared. Examples of the material constituting the intaglio 100 include glasses such as nickel, silicon, and silicon dioxide, organic silicas, glassy carbon, thermoplastic resins, and photocurable resins. In order to improve the releasability, a release layer (not shown) made of a carbon-based material, a silicone-based material, a fluorine-based material, a ceramic-based material, an aluminum-based material, or the like is formed in advance on the surface of the recess 101. Is preferred.

In the present embodiment, as shown in FIG. 7, the concave portion 101 has a zigzag planar shape corresponding to the first and second fine lines 32 and 33. FIG. 7 shows a planar shape of the concave portion 101 corresponding to the first and second fine lines 32 and 33 of the VII portion in FIG. Specifically, the recess 101 includes a first groove 102 corresponding to the first fine line 32 and a second groove 104 corresponding to the second fine line 33. The first groove 102 is formed by repeating the unit shape 103 corresponding to the unit shape 323 of the first thin line 32, and the second groove 104 corresponds to the unit shape 333 of the second thin line 33. It is formed by repeating the unit shape 105.

Next, the recess 101 of the intaglio 100 is filled with a conductive material 110. As the conductive material 110 to be filled in the concave portions 101 of the first intaglio 100, the above-mentioned conductive paste is used. Examples of the method for filling the conductive material 110 include a dispensing method, an ink-jet method, and a screen printing method. Alternatively, as a method of filling the conductive material 110, after coating by a slit coating method, a bar coating method, a blade coating method, a dip coating method, a spray coating method, or a spin coating method, the conductive coating applied to the portions other than the concave portion 101. Examples of the method include wiping, scraping, sucking, sticking, rinsing, or blowing off the conductive material 110.

Next, as shown in FIG. 6B, the first conductor portion 30 is formed by drying or heating the conductive material 110. Conditions for drying or heating the conductive material 110 can be set as appropriate depending on the composition of the conductive material 110 or the like. Under the drying or heating conditions, the conductive material 110 contracts in volume, and the first contact surface 32a of the first conductor portion 30 having an uneven shape is formed. At this time, the outer surface except the upper surface of the conductive material 110 is formed in a shape along the concave portion 101. Note that the method for treating the conductive material 110 is not limited to heating. Irradiation with energy rays such as infrared rays, ultraviolet rays, and laser beams may be performed, or only drying may be performed. Further, these two or more processing methods may be combined.

Next, as shown in FIG. 6C, a resin material 120 for forming the first insulating portion 20 is applied on the intaglio 100. As such a resin material 120, the above-described material forming the first insulating portion 20 is used. Examples of the method for applying the resin material 120 include a screen printing method, a spray coating method, a bar coating method, a dipping method, and an ink jet method. By this application, the resin material 120 enters the concave portion 101 where the first conductor portion 30 is formed.

Next, as shown in FIG. 6D, the support 5 is placed on the resin material 120. This arrangement is preferably performed under vacuum in order to suppress air bubbles from entering between the resin material 120 and the support 5. Then, by curing the resin material 120, the first insulating portion 20 having the convex portion 22 is formed. Examples of a method for curing the resin material 120 include irradiation with energy rays such as ultraviolet rays and infrared laser light, heating, heating and cooling, and drying.

In the present embodiment, the support 5 is laminated after the resin material 120 is applied to the intaglio 100, but the present invention is not particularly limited to this. For example, the resin material 120 may be applied to the support 5 in advance, and the support 5 may be placed on the intaglio 100.

Next, as shown in FIG. 6E, the support 5, the first insulating part 20, and the first conductor part 30 are released from the intaglio 100. Thereby, Intermediate 3 can be obtained.

The second insulating part 40 and the second conductor part 50 can also be formed using an intaglio. That is, first, the second conductor portion 50 is formed in the same manner as in FIGS. 6A and 6B. Next, the side of the intermediate body 3 where the first conductor 30 is formed and the intaglio filled with the second conductor 50 are interposed via a resin material which is a precursor of the second insulating part 40. Glue. Next, after the resin material is cured to form the second insulating portion 40, the intermediate body 3 is released from the intaglio together with the second conductor portion 50 and the second insulating portion 40. Thereby, the wiring board 2 can be obtained.

Next, the cover member 70 is attached to the main surface of the wiring board 2 on the side where the second conductor portion 50 is formed via the third insulating portion 60. As described above, the touch sensor 1 of the present embodiment can be obtained.

The embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

For example, in the above-described embodiment, the first electrode pattern 31 has a band-shaped pattern, but the pattern shape of the first electrode pattern 31 is not particularly limited to this. For example, the first electrode pattern may have a so-called diamond pattern. Similarly, the second electrode pattern 51 may have a diamond pattern instead of the strip pattern.

Further, the thin wires 32, 33 of the first conductor portion 30 and the thin wires 52, 53 of the second conductor portion 50 have trapezoidal cross-sectional shapes projecting upward as shown in FIG. However, the present invention is not particularly limited to this. For example, the top surface of each thin line (the second contact surface 32b in FIG. 5) may have a curved shape that is convex upward. In this case, the top surface of each thin line is connected to two planes forming a tapered shape.

In addition, in order to improve visibility, the fine wires 32, 33, 52, 53 of the first and second conductor portions 30, 50 are not only in addition to the above-described conductive layer containing the conductive particles, but also in comparison with the conductive layer. It may have a black layer having a low reflectance. This black layer is formed by printing a carbon paste, and contains a carbon-based material. The black layer is provided at a position closer to the side where the external conductor contacts than the conductive layer. That is, the conductive layer is located on the display device side, and the black layer is located on the operator side (the surface contacting the external conductor).

Note that black metal oxide particles may be used instead of the carbon-based material. In this case, a black layer can be formed by oxidizing the metal particles located on the operator side in the conductive layer.

Alternatively, the black layer may not have conductivity. In this case, for example, a black layer can be formed by printing black ink, and the black layer contains a black pigment.

In addition, instead of the above-described support 5, a mounting target (a film, a surface glass, a polarizing plate, a display glass, or the like) is bonded to the lower surface of the first insulating unit 20, and the wiring body 10 is supported by the mounting target. May be configured as a wiring body. Further, in this case, a release sheet may be provided on the lower surface of the first insulating portion 20, and the release sheet may be peeled off at the time of mounting and adhered to a mounting object to mount. Alternatively, a mode in which a resin part that covers the wiring body 10 from the first insulating part 20 side is further provided, and the resin part is adhered to the above-described mounting object via the resin part and mounted is also possible. Alternatively, a mode in which the third insulating portion 60 side is adhered to the above-described mounting target and mounted is also possible. In these cases, the mounting object on which the wiring body is mounted corresponds to an example of the support of the present invention.

Further, in the above-described embodiment, the wiring body or the wiring board is described as being used for the touch sensor, but is not particularly limited to this. For example, the wiring body may be used as a heater by energizing the wiring body to generate heat by resistance heating or the like. Alternatively, the wiring body may be used as an electromagnetic shield by grounding a part of the conductor of the wiring body. Further, a wiring body may be used as an antenna. In this case, the mounting object on which the wiring body is mounted corresponds to an example of the support of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Touch sensor 2 ... Wiring board 3 ... Intermediate body 5 ... Support body 10 ... Wiring body 20 ... First insulating part 21 ... Flat part 22 ... Convex part 30 ... First conductor part 31 ... First electrode pattern 311 ... Unit mesh 32 ... First thin line 32a ... First contact surface 32b ... Second contact surface 321 ... First part 322 ... Second part 323 ... Unit shape 324 ... Bent part 33 ... Second thin line 331 ... first part 332 ... second part 333 ... unit shape 334 ... bend part 35 ... first lead-out wiring pattern 40 ... second insulating part 41 ... notch part 50 ... second conductor part 51 ... second Electrode pattern 55... Second lead-out wiring pattern 60... Third insulating portion 61... Cutout portion 70... Cover member 71. 02 ... first grooves 103 ... unit shaped 104 ... second grooves 105 ... unit shaped 110 ... conductive material 120 ... resin material F ... outer conductor

Claims (7)

1. An insulation section,
   And a conductor provided on the insulating portion,
   The conductor portion includes a mesh-shaped electrode pattern having a plurality of thin lines crossing each other,
   The plurality of thin lines include a first thin line extending in a first direction as a whole,
   The first thin line has a zigzag shape that repeats a unit shape including a first portion and a second portion,
   The first portion extends in a second direction different from the first direction;
   The second portion is connected to an end of the first portion and extends in a third direction different from the first and second directions;
   The first portion is a wiring body longer than the second portion.
2. The wiring body according to claim 1, wherein
   A wiring body satisfying the following expressions (1) and (2).
   0 ° <θ ₁ <45 ° (1)
   θ ₁ −90 ° <θ ₂ <−θ ₁ (2)
   However, in the above equations (1) and (2), θ ₁ is an angle formed by the second direction with respect to the first direction, and θ ₂ is an angle formed by the first direction with respect to the first direction. The angle formed by the third direction.
3. The wiring body according to claim 1 or 2,
   A wiring body satisfying the following expression (3).
   w ≦ L ₀ ≦ 10 × w (3)
   However, in the above (3), w is a width of the first thin line, L ₀ is the length of the unit shape.
4. The wiring body according to any one of claims 1 to 3, wherein
   A wiring body satisfying the following expression (4).
   σL ₀ ≦ 5.0 μm (4)
   However, in the above equation (4), σL ₀ is the standard deviation of the length L ₀ of the unit shape.
5. The wiring body according to any one of claims 1 to 4, wherein
   The wiring body, wherein the insulating portion includes a convex portion provided with the first fine wire.
6. A wiring body according to any one of claims 1 to 5,
   And a support for supporting the wiring body.
7. A touch sensor comprising the wiring board according to claim 6.

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