JP2020047172A - Wiring body, wiring board, and touch sensor - Google Patents

Abstract

To provide a wiring body configured to prevent electrostatic breakdown due to static electricity.SOLUTION: A wiring body 10 includes a first insulating section 20, and a first conductor section 30 formed on the first insulating section 20. The first conductor section 30 includes a first conductor wire 321 and a second conductor wire 322 intersecting with each other, includes a mesh-like first electrode pattern 31 extended in a first direction D. The first conductor wire 321 is extended in a second direction D. The second conductor wire 322 is extended in a third direction Ddifferent from the second direction D. The wiring body satisfies the following expressions (1) and (2): θ<θ...(1), W>W...(2), wherein θis an angle formed by the second direction Dand the first direction D, θis an angle formed by the third direction Dand the first direction D, Wis a width of the first conductor wire 321, and Wis a width of the second conductor wire 322.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a wiring body, a wiring board, and a touch sensor.

  2. Description of the Related Art A touch panel having a mesh electrode layer formed by crossing conductor lines is known (for example, see Patent Document 1).

JP-A-2006-218745

  In the above touch panel, the two intersecting conductor lines have the same width as each other, and are each inclined at 45 ° with respect to the extending direction of the mesh electrode layer. When the reticulated electrode layer composed of the conductor wires having such width and inclination is charged by the static electricity, the static electricity tends to stay on the reticulated electrode layer. As a result, there has been a problem that the conductive wire is apt to be charged and destroyed due to static electricity.

  The problem to be solved by the present invention is to provide a wiring body, a wiring board, and a touch sensor that can prevent electrostatic destruction due to static electricity.

[1] A wiring body according to the present invention includes an insulating portion, and a first conductor portion formed on the insulating portion, wherein the first conductor portion intersects first conductor lines. A first electrode pattern having a mesh shape extending in a first direction, the first conductor line extending in a second direction, and Is a wiring body that extends in a third direction different from the second direction, and satisfies the following expressions (1) and (2).
θ ₁ <θ ₂ (1)
W ₁ > W ₂ (2)
However, in the above equations (1) and (2), θ ₁ is the angle between the second direction and the first direction, and θ ₂ is the angle between the third direction and the first direction. is the angle Nasu, W ₁ is the line width of the first conductor line, W ₂ is the line width of the second conductor line.

[2] In the above invention, the wiring body may satisfy the following expression (3).
0 ° ≦ θ ₁ <45 ° (3)

[3] In the above invention, the wiring body may satisfy the following expression (4).
0 μm <W ₁ −W ₂ ≦ 5 μm (4)

[4] In the above invention, the wiring body may satisfy the following expression (5).
1 <W ₁ / W ₂ ≦ 6 (5)

[5] In the above invention, the first conductor line and the second conductor line may be substantially orthogonal to each other.

[6] In the above invention, the wiring body includes a second conductor portion provided on the insulating portion and opposed to the first conductor portion via the insulating portion, wherein the second conductor portion includes: Including a third conductor line and a fourth conductor line that intersect each other, a second electrode pattern in a mesh shape extending in a fourth direction is included, and the third conductor line is arranged in a fifth direction. The fourth conductor line extends in a sixth direction different from the fifth direction, and may satisfy the following expressions (5) and (6).
θ ₃ <θ ₄ (5)
W ₃ > W ₄ (6)
However, in the above formulas (5) and (6), θ ₃ is the angle between the fifth direction and the fourth direction, and θ ₄ is the angle between the sixth direction and the fourth direction. is the angle Nasu, W ₃ is the line width of the third conductive line, W ₄ is the line width of the fourth conductor wires.

[7] In the above invention, the first direction and the fourth direction may be substantially orthogonal to each other.

[8] In the above invention, the first conductor portion includes a mesh-like first dummy pattern including a fifth conductor line and a sixth conductor line that intersect each other, and the second conductor portion Includes a mesh-shaped second dummy pattern including a seventh conductor line and an eighth conductor line that intersect with each other, and in plan view, the first to eighth conductor lines have the same lattice. A repeating grid pattern may be formed.

[9] 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.

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

In the wiring body according to the present invention, since the line width of the first conductor line is larger than the line width of the second conductor line (W ₁ > W ₂ ), the first conductor line has a larger width than the second conductor line. The electrical resistance of the wire has decreased. Further, the angle formed by the first conductor line with the first direction (the extending direction of the first electrode pattern) is smaller than that of the second conductor line (θ ₁ <θ ₂ ). For this reason, static electricity easily passes through the first conductor line having a lower electric resistance and flows easily in the extending direction of the first electrode pattern. Therefore, it is possible to prevent the electrostatic breakdown of the first and second conductor lines due to the static electricity. Can be planned.

FIG. 1 is a plan view illustrating the touch sensor according to the present embodiment. FIG. 2 is an exploded perspective view showing the touch sensor according to the present embodiment. FIG. 3 is an enlarged plan view showing a portion III in FIG. FIG. 4 is an enlarged plan view of the first electrode pattern and the first dummy pattern extracted from FIG. FIG. 5 is an enlarged view of a portion V in FIG. FIG. 6 is a sectional view taken along the line VI-VI in FIG. FIG. 7 is a sectional view taken along line VII-VII in FIG. FIG. 8 is an enlarged plan view of the second electrode pattern and the second dummy pattern extracted from FIG. FIG. 9 is an enlarged view of a portion IX in FIG.

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

  FIG. 1 is a plan view illustrating a touch sensor according to the present embodiment, and FIG. 2 is an exploded perspective view illustrating the touch sensor according to the present embodiment. Note that, for convenience, the third insulating portion 60 and the cover panel 70 are not shown in FIG. 1, but actually, as shown in FIG. A panel 70 is provided. The touch sensor 1 illustrated in FIG. 1 is a projection-type capacitive touch panel sensor, and is used as an input device having a function of detecting a touch position in combination with, for example, 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” in the present embodiment corresponds to an example of the “touch sensor” in the present invention.

  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, as shown in FIG. 2, when an operator's finger (outer conductor) F approaches the touch sensor 1, a capacitor (capacitance) is formed between the outer conductor F and the touch sensor 1. ) Is formed, and the electrical state between the two 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. 2, the touch sensor 1 includes a wiring board 2 including a wiring body 10 and a support 80, and a cover panel 70 attached to one surface of the wiring board 2. The “wiring body 10” in the present embodiment corresponds to an example of the “wiring body” in the present invention, and the “support 80” 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 80 has a rectangular outer shape, and is made of a transparent material in order to ensure the visibility of the display device. As a material constituting the support 80, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide resin (PI), polyetherimide resin (PEI), polycarbonate (PC), polyetheretherketone ( PEEK), liquid crystal polymer (LCP), cycloolefin polymer (COP), silicone resin (SI), acrylic resin, phenol resin, epoxy resin, green sheet, glass, and the like can be used. The wiring body 10 is attached to the support 80, and the wiring body 10 is supported by the support 80. In this case, it is preferable that the support 80 has a rigidity enough to support the wiring body 10.

  As shown in FIG. 2, the wiring body 10 includes a first insulating section 20, a first conductor section 30, a second insulating section 40, a second conductor section 50, and a third insulating section 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. Therefore, the “second insulating section 40” in the present embodiment corresponds to an example of the “insulating section” in the present invention, and the “first conductor section 30” in the present embodiment corresponds to the “first insulating section 30” in the present invention. The "second conductor 50" in the present embodiment corresponds to an example of the "second conductor" in the present invention.

  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).

  The first insulating portion 20 has a rectangular outer shape, and is made of a resin material having transparency and electrical insulation. Examples of the resin material include 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. be able to. The lower surface of the first insulating part 20 is attached to the support 80.

  The first conductor section 30 is provided on the first insulating section 20 and is held by the first insulating section 20. 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 a conductive material 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 material 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 material. 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, and tetradecane.

  As shown in FIGS. 1 and 2, the first conductor 30 includes a plurality of first electrode patterns 31, a plurality of first leads 34, and a plurality of first dummy patterns 38. In. Note that the “first electrode pattern 31” in the present embodiment corresponds to an example of the “first electrode pattern” in the present invention, and the “first dummy pattern 38” in the present embodiment corresponds to the “first electrode pattern” in the present invention. Dummy pattern ”.

Each first electrode pattern 31 extends in a first direction D ₁ (X direction in the figure). The plurality of first electrode patterns 31 are arranged in the Y direction in the drawing. Each of the first electrode patterns 31 includes, as shown in FIGS. 1 and 2, a plurality of first body portions 32 and a plurality of first connection portions 33.

  The first main body portions 32 located at both ends of the first electrode pattern 31 have a triangular shape, and the other first main body portions 32 have a substantially rhombic shape. The plurality of first main bodies 32 are arranged in the direction in which the first electrode patterns 31 extend (the X direction in the drawing). The first main body portions 32 adjacent to each other are electrically connected via a first connecting portion 33. The electrode width of the first electrode pattern 31 in the first connection part 33 is smaller than the electrode width of the first electrode pattern 31 in the first main body part 32.

  3 is an enlarged plan view showing a portion III in FIG. 1, and FIG. 4 is an enlarged plan view showing only the first electrode pattern 31 and the first dummy pattern 38 in the portion III for convenience. . 5 is an enlarged view of a portion V in FIG. 4, FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII in FIG. is there. In FIG. 3, the dashed line indicates the outer shape of the first electrode pattern 31, and the two-dot chain line indicates the outer shape of the second electrode pattern 51.

  As shown in FIG. 3, in a plan view, the first electrode pattern 31 and the second electrode pattern 51 intersect, and the first connection portion 33 of the first electrode pattern 31 A second connecting portion 53 (described later) of the electrode pattern 51 overlaps. On the other hand, in plan view, the first main body 32 of the first electrode pattern 31 and the second main body 52 (described later) of the second electrode pattern 51 do not overlap.

As shown in FIG. 4, the first electrode pattern 31 has a plurality of linear first conductor lines 321 and a plurality of linear second conductor lines 322. The first conductor line 321 extends in a second direction D _2, while the second conductor line 322 extends in a third direction different from D ₃ and the second direction D ₂ ing. In the present embodiment, the angle of the angle between the second direction D ₂ and the third direction D ₃ is 90 °, the first conductor line 321 and the second conductor lines 322 are orthogonal. The “first conductor line 321” in the present embodiment corresponds to an example of the “first conductor line” in the present invention, and the “second conductor line 322” in the present embodiment corresponds to the “second conductor line” in the present invention. Line ".

  The plurality of first conductor lines 321 are arranged at equal intervals (equal pitch), and similarly, the plurality of second conductor lines 322 are arranged at equal intervals. The first conductor line 321 and the second conductor line 322 intersect each other to form a plurality of lattices, and the first main body part 32 and the first connection part 33 form a plurality of first and second connection parts. It has a mesh shape composed of a grid composed of two conductor wires 321 and 322. Thus, the first electrode pattern 31 has a mesh shape. The number of the first and second conductor wires 321 and 322 constituting the first main body 32 and the first connecting portion 33 is not particularly limited.

As described above, the electrode width of the first electrode pattern 31 in the first connection portion 33 is smaller than the electrode width of the first electrode pattern 31 in the first main body portion 32. In other words, the number of the first and second conductor wires 321 and 322 in the first connecting portion 33 is smaller than the number of the first and second conductor wires 321 and 322 in the first main body 32. I have. Therefore, the total S ₁ of the cross-sectional areas of the first and second conductor wires 321 and 322 when the first connection portion 33 is cut along the width direction of the first electrode pattern 31 is equal to the first main body portion. is smaller than the sum _{S 2} of the first and the cross-sectional area of the second conductor lines 321 and 322 when 32 were cut in the same direction _(S 1 _<S 2).

The first conductor line 321 is inclined by an angle theta ₁ to the first direction _{D 1.} That is, the angle between the imaginary line l ₁ extending in the first direction D ₁ shown in FIG. 5 and the first conductor line 321 extending in the _second direction D ₂ (the first direction D ₁ the second angle formed by the direction _{D 2} of) becomes theta _1. The angle θ ₁ is preferably equal to or greater than 0 ° and less than 45 ° as in the following equation (1). When the angle θ ₁ satisfies the following expression (1), static electricity can easily flow through the first conductor line 321 having a low electric resistance in the extending direction of the first electrode pattern 31.
0 ° ≦ θ ₁ <45 ° (1)

  The first conductor wire 321 is provided on the convex portion 21 of the first insulating part 20, as shown in the cross-sectional view of FIG. The first conductor line 321 has a tapered shape that becomes gradually narrower as the first conductor line 321 is separated from the first insulating portion 20 when a cross section cut in the width direction of the first conductor line 321 is viewed. In the first conductor line 321, the first contact surface 321 c that contacts the protrusion 21 is relatively rough with respect to the second contact surface 321 d that contacts the second insulating portion 40. Specifically, the surface roughness Ra of the first contact surface 321c is 0.1 μm to 3 μm, whereas the surface roughness Ra of the second contact surface 321d is 0.001 μm to 1.0 μm. It has become. This surface roughness Ra is “arithmetic average roughness Ra” defined by the JIS method (JIS B0601 (revised on March 21, 2013)).

Further, in the present embodiment, the line width W ₁ of the first conductor line 321 is constant along the extending direction (the second direction D _2). Note that the line width of the first conductor line 321 means the line width of the widest part when a cross section cut in the width direction of the first conductor line 321 is seen, and the line width of the first conductor line 321 in FIG. corresponds to the line width _{W 1} of the first contact surface 321c. The line width W1 of the _first conductor line 321 is preferably larger than 0.5 μm and equal to or smaller than 20 μm (0.5 μm <W ₁ ≦ 20 μm). The line width W ₁ to be larger than 0.5 [mu] m, it is possible to further improve the conductivity of the first conductor line 321. By the line width W ₁ and 20μm or less, the first conductive line 321 is less likely to be more visible, the visibility of the touch sensor 1 is further improved. Further, the line width W ₁ is more preferably ₁ μm or more and 10 μm or less (1 μm ≦ W ₁ ≦ 10 μm), and particularly preferably 7 μm or less (W ₁ ≦ 7 μm).

Returning to FIG. 5, the second conductor line 322 is inclined by an angle theta ₂ to the first direction _{D 1.} That is, the angle between the imaginary line l ₁ extending in the first direction D ₁ shown in FIG. 5 and the second conductor line 322 extending in the _third direction D ₃ (the first direction D ₁ angle) formed between the third direction _{D 3} is becomes theta _2. In the present embodiment, the angle theta ₂ is, as shown in the following equation (2) is greater with respect to the angle theta _1. That is, the first conductor line 321, than the second conductor line 322 is approaching more parallel to the first direction _{D 1.}
θ ₁ <θ ₂ (2)

  The second conductor wire 322 is provided on the convex portion 21 of the first insulating portion 20, as shown in the cross-sectional view of FIG. The second conductor line 322 has a tapered shape that becomes gradually narrower as it moves away from the first insulating portion 20 when a cross section cut in the width direction of the second conductor line 322 is viewed. In the second conductor line 322, the first contact surface 322c that contacts the protrusion 21 is relatively rough with respect to the second contact surface 322d that contacts the second insulating portion 40. Specifically, the surface roughness Ra of the first contact surface 322c is 0.1 μm to 3 μm, while the surface roughness Ra of the second contact surface 322d is 0.001 μm to 1.0 μm. It has become. This surface roughness Ra is “arithmetic average roughness Ra” defined by the JIS method (JIS B0601 (revised on March 21, 2013)).

Further, the line width W ₂ of the second conductor line 322 is constant along the extending direction (third direction D _3). Note that the line width of the second conductor line 322 means the line width of the widest part when a cross section cut in the width direction of the second conductor line 322 is seen, corresponds to the line width _{W 2} of the first contact surface 322c. The line width W _2, as the following equation (3), which is thinner than the line width W ₁ of the first conductor line 321.
W ₁ > W ₂ (3)

The line width W2 of the _second conductor line 322 is preferably 0.5 μm or more and less than 20 μm (0.5 μm ≦ W ₂ <20 μm). The line width W ₂ With more than 0.5 [mu] m, it is possible to further improve the conductivity of the second conductor line 322. The line width W ₂ that is less than 20 [mu] m, since the second conductive line 322 is less likely to be more visible, the visibility of the touch sensor 1 is further improved. The line width W ₂ is more preferably 1 μm or more and 10 μm or less (1 μm ≦ W ₂ ≦ 10 μm), and particularly preferably 7 μm or less (W ₂ ≦ 7 μm).

Furthermore, as the difference between the line width W ₁ and widths W ₂ below (4), by a 5μm or less, the first conductive line 321 is hardly visible more bone. Thereby, the visibility of the touch sensor 1 can be further improved.
0 μm <W ₁ −W ₂ ≦ 5 μm (4)

Further, the line width W ₁ and widths W ₂ is preferably satisfies the following equation (5), it is more preferable to satisfy the following equation (6), that satisfies the following equation (7) Is particularly preferred. Thereby, the first conductor wire 321 is more difficult to see the bones, and the visibility of the touch sensor 1 can be further improved.
1 <W ₁ / W ₂ ≦ 6 (5)
1 <W ₁ / W ₂ ≦ 2 (6)
1 <W ₁ / W ₂ ≦ 1.5 (7)

  As shown in FIGS. 1 and 2, one end of the first lead wire 34 is connected to one longitudinal end of each first electrode pattern 31. The other end of the first lead wire 34 is electrically connected to an external circuit. The number of the first electrode patterns 31 is not particularly limited and can be set arbitrarily. The number of the first lead lines 34 is not particularly limited and is set according to the number of the first electrode patterns 31. Is done.

  As shown in FIG. 2, the plurality of first dummy patterns 38 are arranged in a region where the first electrode pattern 31 is not formed in the first insulating section 20. It is electrically insulated. In the present embodiment, a first dummy pattern 38 is arranged between the plurality of first electrode patterns 31, and the first dummy pattern 38 is connected to the second dummy pattern 38 via the second insulating portion 40. It faces the electrode pattern 51.

  The first dummy pattern 38, the first electrode pattern 31, and the first lead 34 are provided on substantially the same plane. As shown in FIG. 3, the first dummy pattern 38 and the first electrode pattern 31 form a uniform grid pattern that repeats the same grid on the same plane.

  As shown in FIG. 4, each of the first dummy patterns 38 has a first dummy fine line 381 and a second dummy fine line 382 that are linear with each other. The “first dummy thin wire 381” in the present embodiment corresponds to an example of the “fifth conductor wire” of the present invention, and the “second dummy thin wire 382” in the present embodiment corresponds to the “sixth conductor” of the present invention. Line ".

The first dummy fine wire 381 has substantially the same cross-sectional shape as the cross-sectional shape of the first conductor line 321 (see FIG. 6), and like the first conductor line 321, the first insulating thin wire 381 It is formed on the convex portion 21 of the portion 20. First dummy thin line 381, like the first conductive line 321 extends in the second direction _{D 2,} the first dummy thin line 381, an extension of the first conductor line 321 (the virtual On a typical extension). Therefore, the angle formed between the first direction of the first dummy thin line 381 is theta _1, and the line width has a W _1. Note that the angle and the line width of the first dummy fine line 381 with respect to the first direction may be different from those of the first conductor line.

On the other hand, the second dummy thin wire 382 has substantially the same cross-sectional shape as the cross-sectional shape of the second conductor line 322 (see FIG. 7). Is formed on the convex portion 21 of the insulating portion 20. The second dummy thin line 382, like the second conductive line 322 extends in a third direction _{D 3,} the second dummy thin line 382, the extension of the second conductor line 322 (the virtual On a typical extension). Therefore, the angle formed between the first direction of the second dummy thin line 382 is theta _2, and the line width has a W _2. Note that the angle and line width of the second dummy thin line 382 with respect to the first direction may be different from those of the second conductor line.

  The first dummy thin wires 381 extend substantially in parallel with the fourth conductor lines 522 (described later) in plan view in FIG. 3 and are located between the fourth conductor lines 522. On the other hand, the second dummy thin wires 382 extend substantially parallel to the third conductor lines 521 (described later), and are located between the third conductor lines 521. In the present embodiment, the first dummy fine wires 381 extend so as to divide the distance between the adjacent fourth conductor wires 522 into two, and similarly, the second dummy fine wires 382 are adjacent to each other. The third conductor wire 521 extends so as to divide the interval between the third conductor wire 521 into two equal parts.

  Further, as shown in FIG. 4, a disconnection portion 383 is provided between the first dummy thin line 381 and the first conductor line 321 and between the second dummy thin line 382 and the second conductor line 322. Is formed. The disconnection portion 383 electrically insulates the first dummy thin wire 381 from the first conductor wire 321 and electrically insulates the second dummy thin wire 382 from the second conductor wire 322. ing.

  As shown in FIG. 2, 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. A cutout portion 41 is formed in the second insulating portion 40. The other end of the first lead wire 34 is exposed from the notch 41.

  The second conductor part 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.

  As shown in FIGS. 1 and 2, the second conductor 50 includes a plurality of second electrode patterns 51, a plurality of second lead lines 54, and a plurality of second dummy patterns 58. In. The “second electrode pattern 51” in the present embodiment corresponds to an example of the “second electrode pattern” in the present invention, and the “second dummy pattern 58” in the present embodiment corresponds to the “second dummy pattern” in the present invention. Pattern ".

Each second electrode pattern 51 extends in a fourth direction D ₄ (Y direction in the figure), and the fourth direction D ₄ is substantially orthogonal to the above-described first direction D _1. ing. In other words, the second electrode pattern 51 is substantially orthogonal to the first electrode pattern 31 in a transmission plane view. In this manner, the first direction _{D 1} and the fourth direction _{D 4} are substantially orthogonal, the first to fourth conductor wires 321,322,521,522 are arranged in good balance, The wiring density becomes more uniform overall. As a result, the visibility of the touch sensor 1 can be further improved. In particular, when the first electrode pattern 31 and the second electrode pattern 51 have substantially the same shape as in the present embodiment, the visibility of the touch sensor 1 can be particularly improved. it can. The plurality of second electrode patterns 51 are arranged in the X direction in the figure. Each second electrode pattern 51 includes a plurality of second main bodies 52 and a plurality of second connecting parts 53.

As shown in FIG. 2, the second main body portions 52 located at both ends of the second electrode pattern 51 have a triangular shape, and the other second main body portions 52 have a substantially rhombic shape. ing. The plurality of second main bodies 52 of the second electrode pattern 51 are arranged in the direction in which the second electrode pattern 51 extends (fourth direction D ₄ ). The second main body portions 52 adjacent to each other are electrically connected via a second connecting portion 53. The electrode width of the second electrode pattern 51 in the second connecting portion 53 is smaller than the electrode width of the second electrode pattern 51 in the second main body 52.

  8 is an enlarged plan view showing only the second electrode pattern and the second dummy pattern in FIG. 3, and FIG. 9 is an enlarged view of a portion IX in FIG. As shown in FIG. 8, the second electrode pattern 51 has a plurality of linear third conductor lines 521 and a plurality of linear fourth conductor lines 522. The number of the third and fourth conductor wires 521 and 522 constituting the second main body 52 is not particularly limited. The “third conductor line 521” in the present embodiment corresponds to an example of the “third conductor line” in the present invention, and the “fourth conductor line 522” in the present embodiment corresponds to the “fourth conductor line” in the present invention. Conductor wire ".

The third conductive line 521 extends in direction D ₅ of the fifth, while the fourth conductor wire 522 extends in the direction D ₆ different sixth to the direction D ₅ of the fifth ing. In the present embodiment, the direction D ₅ of the fifth angle formed between the direction D ₆ of the sixth is 90 °, the third conductor wire 521 and the fourth conductive lines 522 are orthogonal.

  The plurality of third conductor lines 521 are arranged at equal intervals (equal pitch), and similarly, the plurality of fourth conductor lines 522 are arranged at equal intervals. The third conductor wire 521 and the fourth conductor wire 522 intersect each other to form a plurality of lattices, and the second main body 52 and the second connecting portion 53 form a plurality of third and fourth conductors. It has a mesh shape composed of a grid composed of four conductor wires 521 and 522. Thus, the second electrode pattern 51 has a mesh shape. In addition, the number of the third and fourth conductor wires 521 and 522 constituting the second main body 52 and the second connecting portion 53 is not particularly limited.

As described above, the electrode width of the second electrode pattern 51 in the second connecting portion 53 is smaller than the electrode width of the second electrode pattern 51 in the second main body 52. In other words, the number of the third and fourth conductor wires 521 and 522 in the second connecting portion 53 is smaller than the number of the third and fourth conductor wires 521 and 522 in the second main body 52. I have. Thus, the total S ₃ of the third and the cross-sectional area of the fourth conductor wires 521 and 522 at the time of cutting the second connecting portion 53 along the width direction of the second electrode patterns 51, the second body portion is smaller than the sum _{S 4} of the third and the cross-sectional area of the fourth conductor wires 521 and 522 when 52 were cut in the same direction _(S 3 _<S 4).

Third conductor wire 521 is inclined by an angle theta ₃ with respect to the fourth direction _{D 4.} That is, the virtual line l ₂ which extend in the fourth direction D ₄ shown in FIG. 9, the third angle (fourth direction D ₄ formed between the conductor line 521 extending in a fifth direction D ₅ angle) is theta ₃ formed between the direction _{D 5} of the fifth. The angle theta _3, like the theta ₁ of equation (1) is preferably less than 0 ° or 45 °.

The third conductor wire 521 has substantially the same cross-sectional shape as the first conductor wire 321 (see FIG. 6), and like the first conductor wire 321, the second conductor wire 521 has the same cross-sectional shape as the first conductor wire 321. It is formed on the convex part of the insulating part 40. Therefore, the third conductor line 521 has a line width _{W 3} of the same line width _{W 1} of the first conductor line 321.

Fourth conductor wire 522 is inclined by an angle theta ₄ with respect to the fourth direction _{D 4.} That is, the virtual line l ₂ which extend in the fourth direction D _4, the fourth angle (fourth direction D ₄ formed between the conductor line 522 extending in the direction D ₆ of the sixth sixth direction D angle formed ₆ and is) is theta _4. In the present embodiment, the angle theta ₄ is, as shown in the following equation (8) is greater with respect to the angle theta _3. That is, the third conductive line 521, than the fourth conductor wire 522 is approaching more parallel to the fourth direction _{D 4.}
θ ₃ <θ ₄ (8)

The fourth conductor wire 522 has substantially the same cross-sectional shape as the cross-sectional shape of the second conductor wire 322 (see FIG. 7), and like the third conductor wire 521, It is formed on the convex part of the insulating part 40. Therefore, the fourth conductor wire 522 has the same line width _{W 4} and the line width _{W 2} of the second conductor line 322. The line width W _4, as follows (9), which is thinner than the line width W ₃ of the third conductor line 521.
W ₃ > W ₄ (9)

Furthermore, as the difference between the line width W ₃ and widths W ₄ below (10), by a 5μm or less, the third conductor wire 521 is less likely to look more bone. Thereby, the visibility of the touch sensor 1 can be further improved.
0 μm <W ₃ −W ₄ ≦ 5 μm (10)

The line width W ₃ and the line width W ₄ preferably satisfy the following expression (11), more preferably satisfy the following expression (12), and more preferably satisfy the following expression (13). Is particularly preferred. Thereby, the visibility of the touch sensor 1 can be further improved.
1 <W ₃ / W ₄ ≦ 6 (11)
1 <W ₃ / W ₄ ≦ 2 (12)
1 <W ₃ / W ₄ ≦ 1.5 (13)

Further, the line width _{W 1} of the first conductor line 321 of the first electrode pattern 31, a fourth difference between the line width _{W 4} of the conductor line 522 of the second electrode patterns 51, the following equation (14) of As such, it is preferably 5 μm or less. Similarly, the line width _{W 3} of the third conductor wire 521 of the second electrode patterns 51, the difference between the line width _{W 2} of the second conductor line 322 of the first electrode pattern 31 is also below (15) As described above, the thickness is preferably 5 μm or less.
0 μm <W ₁ −W ₄ ≦ 5 μm (14)
0 μm <W ₃ −W ₂ ≦ 5 μm (15)

  As shown in FIGS. 1 and 2, one end of a second lead wire 54 is connected to one end in the longitudinal direction of each second electrode pattern 51. The other end of each second lead wire 54 is located at the edge of the wiring body 10, and the other end of the second lead wire 54 is electrically connected to an external circuit.

  As shown in FIG. 2, the second dummy pattern 58 is disposed in a region where the second electrode pattern 51 is not formed in the second insulating section 40, and is electrically connected to the second electrode pattern 51. Insulated. In the present embodiment, a second dummy pattern 58 is arranged between the plurality of second electrode patterns 51, and the second dummy pattern 58 is connected to the first dummy pattern 58 via the second insulating portion 40. It faces the electrode pattern 31.

  The second dummy pattern 58, the second electrode pattern 51, and the second lead 54 are provided on substantially the same plane. As shown in FIG. 8, the second dummy pattern 58 and the second electrode pattern 51 form a uniform grid pattern that repeats the same grid on the same plane.

  As shown in FIG. 8, each of the second dummy patterns 58 has a third linear dummy thin line 581 and a fourth linear thin dummy line 582 that intersect each other. The “third dummy fine wire 581” in the present embodiment corresponds to an example of the “seventh conductor wire” of the present invention, and the “fourth dummy fine wire 582” in the present embodiment corresponds to the “eighth conductor” of the present invention. Line ".

The third dummy fine wire 581 has substantially the same cross-sectional shape as the cross-sectional shape of the third conductor line 521 (see FIG. 6), and like the third conductor line 521, has the second insulation It is formed on the convex part of the part 40. The third dummy thin line 581, similar to the third conductor line 521 extends in the direction _{D 5} of the fifth, third dummy thin line 581, an extension of the third conductor wire 521 (virtual On a typical extension). Therefore, the angle formed between the fourth direction _{D 4} of the third dummy thin line 581 theta _3, and the line width has a _{W 3.} The angle and line width forming a fourth direction D ₄ of the third dummy thin line 581 may be different from the third conductor wire 521.

On the other hand, the fourth dummy fine wire 582 has substantially the same cross-sectional shape as the cross-sectional shape of the fourth conductor line 522 (see FIG. 7), and like the fourth conductor line 522, Is formed on the convex portion of the insulating portion 40. Fourth dummy thin line 582, similarly to the fourth conductor wire 522 extends in the direction _{D 6} of the sixth, fourth dummy thin line 582, the extension of the fourth conductor wire 522 (virtual On a typical extension). Therefore, the angle formed between the fourth direction _{D 4} of the fourth dummy thin line 582 theta _4, and the line width has a _{W 4.} The angle and line width forming a fourth direction D ₄ of the fourth dummy thin line 582 may be different from the fourth conductor wire 522.

  The third dummy thin wire 581 extends substantially parallel to the second conductor lines 322 in the plan view of FIG. 3 and is located between the second conductor lines 322. On the other hand, the fourth dummy thin wires 582 extend substantially in parallel with the first conductor lines 321 and are located between the first conductor lines 321. In the present embodiment, the third dummy fine wires 581 extend so as to divide the interval between the adjacent second conductor wires 322 into two, and similarly, the fourth dummy fine wires 582 are adjacent to each other. The first conductor lines 321 extend so as to divide the distance between the first conductor lines 321 into two.

  As shown in FIG. 8, a disconnection portion 583 is provided between the third dummy thin line 581 and the third conductor line 521 and between the fourth dummy thin line 582 and the fourth conductor line 522. Is formed. The disconnection portion 583 electrically insulates the third dummy thin wire 581 from the third conductor wire 521 and electrically insulates the fourth dummy thin wire 582 from the fourth conductor wire 522. ing.

  As shown in FIG. 3, the first electrode pattern 31, the first dummy pattern 38, the second electrode pattern 51, and the second dummy pattern 58 make the touch sensor 1 seem to have the same grid in plan view. Are formed (see FIG. 3). This same grid is formed by overlapping the first electrode pattern 31 and the second dummy pattern 58 with the second electrode pattern 51 and the first dummy pattern 38. It includes a grid and a grid formed by overlapping a part of the first connection part 33 of the first electrode pattern 31 and a part of the second connection part 53 of the second electrode pattern 51. .

  In other words, the same lattice is formed by the first to fourth conductor lines 321, 322, 521, 522 and the first to fourth dummy fine lines 381, 382, 581, 582. In the lattice pattern A, conductor lines having relatively large line widths (first and third conductor lines 321 and 521, and first and third dummy thin lines 381 and 581) and conductor lines having relatively small line widths are provided. (The second and fourth conductor wires 322 and 522, and the second and fourth dummy fine wires 382 and 582) are alternately arranged. In the present embodiment, since such a lattice pattern A is formed, the visibility of the touch sensor 1 can be further improved.

  Returning to FIG. 2, 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 material as the resin material forming the first insulating portion 20 can be used. As a material constituting the third insulating portion 60, for example, an adhesive such as a silicone resin-based adhesive, an acrylic resin-based adhesive, a urethane resin-based adhesive, or a polyester resin-based adhesive 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 wire 54 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 34 is also exposed from the notch 61.

  The cover panel 70 is attached to the wiring body 10 via an adhesive layer (not shown). As shown in FIG. 2, the cover panel 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.

  Examples of the transparent material forming the cover panel 70 include a glass material such as soda lime glass and borosilicate glass, and a resin material such as polymethyl methacrylate (PMMA) and polycarbonate (PC). The shielding portion 72 is formed by applying, for example, black ink to the outer peripheral portion of the back surface of the cover panel 70. An adhesive layer (not shown) is provided on the back side of the cover panel 70 (on the side in contact with the third insulating portion 60).

As described above, in the present embodiment, the line width W1 of the _first conductor line 321 is larger than the line width W2 of the _second conductor line 322 as shown in the above equation (2). (W ₁ > W ₂ ), the electric resistance of the first conductor line 321 is smaller than that of the second conductor line 322. Further, as shown in the above formula (3), the first conductor line 321 has a first direction D ₁ (extending direction of the first electrode pattern 31) as compared with the second conductor line 322. The angle formed is small (θ ₁ <θ ₂ ). That is, the first conductor line 321 is approaching more parallel to the extending direction of the first electrode pattern 31.

  Therefore, the first electrode pattern 31 easily passes the static electricity through the first conductor line 321 having a lower electric resistance and flows in the direction in which the first electrode pattern 31 extends. Of the conductor wires 321 and 322 can be prevented. Further, even when a sudden overcurrent flows through the first electrode pattern 31, the overcurrent passes through the first conductor line 321 having a lower electric resistance. Thereby, it is possible to prevent the first conductor line 321 and the second conductor line 322 from being broken by an overcurrent. These effects are the same in the second electrode pattern 51 that satisfies the above equations (8) and (9).

  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 to fourth conductor lines 321, 322, 521, 522 and the first to fourth dummy fine lines 381, 382, 581, 582 are formed in a straight line. However, the present invention is not limited to this, and may be, for example, a curve, a broken line, a zigzag line, or the like.

  Further, in the above-described embodiment, the first and second electrode patterns 31 and 51 include a wide portion including the first and second body portions 32 and 52 and the first and second connecting portions 33 and 53. Including a narrow portion, but is not particularly limited to this. For example, the first and second electrode patterns 31 and 51 may have a band shape having a constant width.

  Further, in the above-described embodiment, the first and second lead wires 34 and 54 are configured by one conductor wire, but are not limited thereto. The first and second lead lines 34 and 54 may have a mesh shape including a plurality of conductor lines crossing each other.

  Further, the first and second conductor portions 31 and 51 do not need to include the first and second dummy patterns 38 and 58.

  Further, for example, when the wiring body is configured such that the lower surface of the first insulating unit 20 is adhered to a mounting target (a film, a surface glass, a polarizing plate, a display glass, or the like) and the wiring body 10 is supported by the mounting target. Alternatively, 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 target to mount. Alternatively, a resin portion that covers the wiring body 10 from the first insulating portion 20 side may be further provided, and the resin member may be bonded to the above-described mounting target via the resin portion and mounted. 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, the third insulating portion 60 side may be bonded to the above-mentioned mounting target and mounted. In this case, the cover panel 70 is a mounting target and is an example of a support.

  Further, in the above embodiment, the wiring body or the wiring board is described as being used for the touch sensor, but is not particularly limited thereto. 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 10 ... Wiring body 20 ... 1st insulating part 21 ... Convex part 30 ... 1st conductor part 31 ... 1st electrode pattern
32 first body part
321 first conductor wire
321c: First contact surface
321d: second contact surface
322... Second conductor wire
322c: first contact surface
322d: second contact surface
33: first connecting portion 34: first lead-out line 38: first dummy pattern
381: First dummy thin line
382: second dummy thin line
383: disconnection part 40: second insulating part 41: notch part 50: second conductor part 51: second electrode pattern
52: second main body
521: Third conductor wire
522: fourth conductor wire
53: second connecting portion 54: second lead line 58: second dummy pattern
581: Third dummy thin line
582: Fourth dummy thin line
583: disconnection portion 60: third insulating portion 61: cutout portion 70: cover panel 71: transparent portion 72: shielding portion 80: support member A: grid pattern F: external conductor

Claims (10)

An insulation section,
A first conductor portion formed on the insulating portion,
The first conductor portion includes a first conductor line and a second conductor line that intersect with each other, and includes a mesh-shaped first electrode pattern extending in a first direction,
The first conductor line extends in a second direction,
The second conductor line extends in a third direction different from the second direction,
A wiring body satisfying the following expressions (1) and (2).
θ ₁ <θ ₂ (1)
W ₁ > W ₂ (2)
However, in the above equations (1) and (2), θ ₁ is the angle between the second direction and the first direction, and θ ₂ is the angle between the third direction and the first direction. is the angle Nasu, W ₁ is the line width of the first conductor line, W ₂ is the line width of the second conductor line. The wiring body according to claim 1, wherein
A wiring body satisfying the following expression (3).
0 ° ≦ θ ₁ <45 ° (3) The wiring body according to claim 1 or 2,
A wiring body satisfying the following expression (4).
0 μm <W ₁ −W ₂ ≦ 5 μm (4) The wiring body according to any one of claims 1 to 3,
A wiring body satisfying the following expression (5).
1 <W ₁ / W ₂ ≦ 6 (5) The wiring body according to any one of claims 1 to 4, wherein
A wiring body in which the first conductor line and the second conductor line are substantially orthogonal. The wiring body according to any one of claims 1 to 5, wherein
A second conductor portion provided on the insulating portion and opposed to the first conductor portion via the insulating portion;
The second conductor portion includes a third conductor line and a fourth conductor line that intersect each other, and includes a mesh-shaped second electrode pattern extending in a fourth direction.
The third conductor line extends in a fifth direction,
The fourth conductor line extends in a sixth direction different from the fifth direction,
A wiring body satisfying the following expressions (5) and (6).
θ ₃ <θ ₄ (5)
W ₃ > W ₄ (6)
However, in the above formulas (5) and (6), θ ₃ is the angle between the fifth direction and the fourth direction, and θ ₄ is the angle between the sixth direction and the fourth direction. is the angle Nasu, W ₃ is the line width of the third conductive line, W ₄ is the line width of the fourth conductor wires. The wiring body according to claim 6, wherein
A wiring body in which the first direction and the fourth direction are substantially orthogonal. The wiring body according to claim 6, wherein:
The first conductor portion includes a mesh-shaped first dummy pattern including a fifth conductor line and a sixth conductor line that intersect each other,
The second conductor portion includes a mesh-shaped second dummy pattern including a seventh conductor line and an eighth conductor line that cross each other,
In a plan view, a wiring body in which the first to eighth conductor lines form a grid pattern that repeats the same grid. A wiring body according to any one of claims 1 to 8,
And a support for supporting the wiring body.   A touch sensor comprising the wiring board according to claim 9.

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