JP2022060030A - Conductive sheet, touch sensor and manufacturing method of touch sensor - Google Patents

Abstract

To provide a conductive sheet in which generation of Moire and pattern appearance is suppressed by a mesh shape with reduced design load, a touch sensor and a manufacturing method of the touch sensor.SOLUTION: A conductive sheet 10 comprises a transparent substrate 11, a plurality of first thin metallic wires 20 formed on a first surface 11a of the transparent substrate 11, and a plurality of second thin metallic wires 30 formed on a second surface 11b of the transparent substrate 11. The first thin metallic wires 20 are arranged side by side in a row direction and a column direction with first squares Sa having vertices overlapped. Each of the first squares Sa lacks one side. The second thin metallic wires 30 are arranged side by side in the row direction and the column direction with second squares Sb having vertices overlapped. Each of the second squares Sb lacks one side. The second square Sb is arranged in a position moved from the first square Sa in the column direction by only 1/2 diagonal line in the column direction of the first square Sa. The second thin metallic wires 30 include no wire that overlaps with the first thin metallic wire 20 in the same direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for manufacturing a conductive sheet, a touch sensor and a touch sensor, and more particularly to a method for manufacturing a conductive sheet, a touch sensor and a touch sensor including a mesh-shaped thin metal wire.

Conventionally, as a conductive sheet used for an electrode of a touch sensor or the like, a sheet in which a mesh-like fine metal wire is formed on a transparent base material has been used. As the pattern shape of the mesh, a grid shape in which polygons such as squares, rhombuses and hexagons are laid out is generally used. However, such a grid shape may interfere with the periodic pattern of the black matrix of the display device arranged under the touch sensor to cause moire (striped pattern). As a countermeasure against such moire, there is a method of making the pattern shape of the mesh a non-periodic pattern, but in the non-periodic pattern, the area of the mesh opening varies, so that the density of the metal fine wire is uneven. It is easy to cause the pattern of fine metal lines to appear.

As described above, a shape that considers both moire and pattern appearance is required as the pattern shape of the mesh. Therefore, in Patent Document 1, a pattern using a Voronoi polygon is applied.

JP 2016-082141

However, since a random shape using a Voronoi polygon, a Delaunay triangle, or the like is complicated, the design load becomes large and the cost may increase.

An object of the present invention is to provide a method for manufacturing a conductive sheet, a touch sensor, and a touch sensor, in which the occurrence of moire and pattern appearance is suppressed by a mesh pattern shape that reduces a design load.

In order to achieve the above object, the first invention relates to a transparent base material and a first surface of the transparent base material so that a plurality of first quadrangles are arranged side by side in the row direction and the column direction so that the vertices are overlapped with each other. It comprises a plurality of first metal wires formed above, and each of the first quadrilaterals is configured to lack one side without missing both sides adjacent in the row or column direction with the apex in between. It is also a conductive sheet.

With this configuration, it is possible to obtain a conductive sheet that suppresses the occurrence of moire and pattern appearance while reducing the design load by the method of lacking one side of the quadrangle.

The second invention is, in the first invention, the first quadrangle is a conductive sheet in which the first quadrangle arranged in the same row or the same column lacks the side at the same position.

With this configuration, it is easy to create a pattern by using a quadrangle lacking sides at the same position, so that the design load can be further reduced.

In the third invention, the transparent base material is provided so that a plurality of second quadrangles are arranged side by side in the row direction and the column direction so that the vertices overlap each other and the lines in the same direction as the first metal thin line do not overlap. A plurality of second metal wires formed on the second surface, and each of the second quadrilaterals of the first quadrangle without lacking both sides adjacent in the row direction or the column direction across the apex. It is a conductive sheet configured to lack one side that does not intersect with the missing side.

A fourth aspect of the invention is that in the third aspect, each of the first quadrilaterals lacks an edge at the same position, and each of the second quadrangles lacks an edge adjacent to the missing edge of the first quadrangle. It was a conductive sheet.

With this configuration, it is possible to suppress moire and pattern appearance while reducing the design load on the conductive sheet in which fine metal wires are formed on both sides of the transparent base material.

A fifth aspect of the invention is that in the second aspect, the first quadrangle is adjacent to the row direction of the side where the first quadrangle arranged in the same row lacks the same side and the first quadrangle arranged in the adjacent row lacks the same side. A side that lacks an edge in position, or a first quadrangle, is a side that is adjacent to the side in which the first quadrangle in the same row lacks the same side and the first quadrangle in an adjacent row lacks in the column direction. It is a conductive sheet lacking.

In the sixth aspect of the invention, in the fourth aspect, the plurality of first metal wires and the plurality of second metal wires constitute a plurality of first electrodes and a plurality of second electrodes, respectively, and the plurality of first electrodes and the plurality of the second electrodes are formed. A conductive sheet having a first connection portion and a second connection portion formed at the end of the second electrode, a terminal portion connected to an external wiring, a first connection portion, a second connection portion, and a terminal portion. It is a touch sensor equipped with a routing wire to connect to.

With this configuration, a touch sensor with a good appearance can be obtained by using a thin metal wire capable of suppressing the occurrence of moire and pattern appearance as the electrode of the touch sensor.

In the seventh aspect of the invention, in the sixth aspect, the first electrode and the second electrode are formed in the operation region, the routing wiring is formed in the peripheral region other than the operation region, and the first electrode and the second electrode in the operation region are formed. It is a touch sensor further provided with a dummy portion that is not electrically connected to the first electrode and the second electrode in the region where the second electrode is not formed.

The eighth invention is the touch sensor in the seventh invention, in which the first electrode and the second electrode have a band shape, and the first electrode, the second electrode, and the dummy portion are alternately arranged.

In the ninth aspect of the invention, in the eighth aspect of the invention, the dummy portion is a touch sensor composed of a plurality of first metal wire or a plurality of second metal wire.

With this configuration, since the electrode and the dummy portion are formed in the operation region, it is possible to obtain a touch sensor that suppresses the bone-seeing phenomenon in which the pattern shape of the electrode is observed by the operator.

The tenth invention comprises a step of sequentially forming a first blackening film layer, a metal film layer, and a second blackening film layer on both surfaces of a transparent base material, and a plurality of first metals on one surface of the transparent base material. A plurality of first electrodes composed of thin wires, a first connection portion formed at each end of the plurality of first electrodes, a first terminal portion connected to an external wiring, a first connection portion, and a first unit. A first routing wire connecting the one terminal portion is provided on the other surface of the transparent base material at a plurality of second electrodes composed of a plurality of second metal thin wires and at the ends of the plurality of second electrodes. A process of simultaneously forming a second connection portion formed, a second terminal portion connected to an external wiring, and a second routing wiring connecting the second connection portion and the second terminal portion, respectively. The plurality of first metal wirings are formed on the first surface of the transparent base material so that the plurality of first squares are arranged side by side in the row direction and the column direction, and the plurality of second metal wires are formed. , A plurality of second squares are formed on the second surface of the transparent base material so as to be arranged side by side in the row direction and the column direction and so that the lines in the same direction as the first metal thin line do not overlap. Each of the first quadrangles is configured to lack one side without missing both sides adjacent in the row or column direction across the apex, and each of the second quadrangles in the row or column direction across the apex. It is a manufacturing method of a touch sensor configured to lack one side that does not intersect with the missing side of the first square without lacking both adjacent sides.

With such a configuration, since a plurality of electrodes, a connection portion, a terminal portion, and a routing wiring are simultaneously formed on both sides, the number of steps can be reduced and the time required for manufacturing can be shortened.

According to the present invention, it is possible to provide a method for manufacturing a conductive sheet, a touch sensor, and a touch sensor that suppress the occurrence of moire and pattern appearance by the mesh shape that reduces the design load.

(A) schematic cross-sectional view, (b) partially enlarged plan view, (c) partially enlarged cross-sectional view of the first metal wiring 20, (d) second metal wire 30 according to the first embodiment of the present invention. It is a partially enlarged sectional view. It is a partially enlarged plan view of the conductive sheet 10 by 1st Embodiment of this invention. (A) A diagram for explaining the first quadrangle Sa, and (b) a diagram for explaining the second quadrangle Sb. (A) is a partially enlarged plan view for explaining the first metal thin wire 20 of FIG. 2, and (b) is a partially enlarged plan view for explaining the second metal thin wire 30 of FIG. 2. (A) (b) It is a figure for demonstrating the pattern design rule of a thin metal wire. It is a partially enlarged plan view of the conductive sheet 10A by the modification A of the 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10B by the modification B of the 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10C by the modification C of 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10D by the modification D of 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10E by the modification E of the 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10F by the modification F of 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10G by the modification G of the 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10H by the modification H of 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10I by the modification I of the 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10J by the modification J of 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10K by the modification K of the 1st Embodiment. It is a partially enlarged plan view of the conductive sheet 10L by the modification L of the 1st Embodiment. It is (a) schematic plan view of the touch sensor 100 by 2nd Embodiment of this invention, (b) (a) a partially enlarged plan view of region K.

The first embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>

With reference to FIG. 1A, the conductive sheet 10 according to the first embodiment of the present invention has a transparent base material 11 and a plurality of first metal thin wires 20 formed on the first surface 11a of the transparent base material 11. And a plurality of second metal fine wires 30 formed on the second surface 11b of the transparent base material 11. The first metal wire 20 and the second metal wire 30 have a pattern shape as shown in FIG. 1B in a plan view from the first surface 11a side. Here, the first metal thin wire 20 on the first surface 11a side is represented by a solid line, and the second metal thin wire 30 on the second surface 11b side is represented by a broken line. With reference to FIG. 1 (c), in the first metal wire 20, the first blackening layer 21, the metal layer 22, and the second blackening layer 23 are laminated from the first surface 11a side of the transparent base material 11. There is. The first blackening layer 21 and the second blackening layer 23 are layers for reducing the reflectance of the thin metal wire 20 and suppressing glare and pattern appearance. Similarly, referring to FIG. 1 (d), the second thin metal wire 30 has a first blackening layer 31, a metal layer 32, and a second blackening layer 33 from the second surface 11b side of the transparent base material 11. It is laminated.

The material of the transparent base material 11 is not particularly limited as long as it is flexible, and for example, polyesters such as polyethylene terephthalate (PET), polylactic acid (PLA), and polyethylene naphthalate (PEN), polyethylene (PE), and polypropylene. Polyethylenes such as (PP), polystyrene, EVA, cycloolefin polymer (COP) and cyclic olefin copolymer (COC), vinyl resin, polycarbonate (PC), polyamide, polyimide (PI), acrylic resin (PMMA), tori Resin films such as acetyl cellulose (TAC), polyurethane, silicone, polyvinyl chloride, and polyvinyl chloride can be used. The thickness of the base film 10 is 5 to 500 μm, preferably 20 to 100 μm.

The transparent base material 11 may be a single-layer film or a film in which a plurality of layers are laminated. The transparent base material 11 may include a retardation film in its composition.

The materials of the metal layers 22 and 32 are not particularly limited, and for example, gold, silver, copper, iron, nickel, chromium, aluminum, molybdenum, titanium and the like, or alloys thereof can be used. As the material of the first blackening layers 21 and 31 and the second blackening layers 23 and 33, metal oxides such as copper, nickel, chromium, aluminum, molybdenum and titanium or metal nitrides can be used.

The line widths of the first metal thin wire 20 and the second metal thin wire 30 are, for example, 1 to 10 μm, preferably 1 to 5 μm. The film thickness of the first metal wire 20 and the second metal wire 30 is, for example, 120 nm to 1.2 μm. The film thicknesses of the first blackening layers 21 and 31 and the second blackening layers 23 and 33 are, for example, 10 to 100 nm, and the film thicknesses of the metal layers 22 and 32 are, for example, 100 nm to 1 μm. The aperture ratio of the first metal wire 20 and the second metal wire 30 is, for example, 90% or more, preferably 95% or more.

Hereinafter, the details of the first metal thin wire 20 and the second metal thin wire 30 will be described.
FIG. 2 is a plan view in which the pattern shapes of the first metal wire 20 and the second metal wire 30 are partially extracted and enlarged when the conductive sheet 10 is observed from the first surface 11a side of the transparent base material 11. .. In FIG. 2, the first metal wire 20 on the first surface 11a side is represented by a solid line, and the second metal wire 30 on the second surface 11b side is represented by a broken line, and the D1 direction is the row direction and the D2 direction is the column direction. .. The first metal wire 20 and the second metal wire 30 form a pattern by laying a quadrangle composed of sides made of the metal wire on the transparent base material 11. In the first metal thin wire 20, the first quadrangle Sa is arranged so as to overlap the vertices in the row direction and the column direction. In the first quadrangle Sa, four rows from Ra1 to Ra4 and four columns from C1 to C4 are extracted. Here, in order to make it easier to see FIG. 2, the first quadrangle Sa is hatched. Each of the first quadrangles Sa lacks one side. In the second metal thin wire 30, the second quadrangle Sb is arranged so as to overlap the vertices in the row direction and the column direction. In the second quadrangle Sb, four rows from Rb1 to Rb4 and four columns from C1 to C4 are extracted. Each of the second quadrilaterals Sb lacks one side. The second quadrangle Sb is arranged at a position moved in the column direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line in the column direction of the first quadrangle Sa. The second metal thin wire 30 is configured so that the lines in the same direction as the first metal thin wire 20 do not overlap.

With reference to FIG. 3, the first quadrangle Sa and the second quadrangle Sb are rhombuses, and their respective sides are thin metal lines. With reference to FIG. 3A, the vertices of the first quadrangle Sa are clockwise from the first vertices P1a to P4a. The side connecting the first vertex P1a and the second vertex P2a is defined as the first side L1a, and each side of the first quadrangle is clockwise from the second side L2a to the fourth side L4a. Each side L1a to L4a of the first quadrangle Sa is a thin metal wire. The diagonal line connecting the first vertex P1a and the third vertex P3a is the first diagonal line H1a, the diagonal line connecting the second vertex P2a and the fourth vertex P4a is the second diagonal line H2a, and the intersection of the first diagonal line H1a and the second diagonal line h2a. Let be Qa. Qa is also the midpoint of the first diagonal line H1a and the second diagonal line H2a. Similarly, referring to FIG. 3B, the vertices of the second quadrangle Sb are clockwise from the first vertex P1b to the fourth vertex P4b, and each side is from the first side L1b to the fourth side L4b. Each side L1b to L4b of the second quadrangle Sb is a thin metal wire. Let the diagonal lines be the first diagonal line H1b and the second diagonal line H2b, respectively, and the intersection of the first diagonal line H1b and the second diagonal line H2b be Qb. Qb is also the midpoint of the first diagonal line H1b and the second diagonal line H2b. Hereinafter, the arrangement of the first quadrangle Sa and the second quadrangle Sb will be described according to these symbols.

FIG. 4A shows only the first metal wire 20 extracted from the metal wire shown in FIG. 2. Here, the first quadrangle Sa is spread in 4 rows and 4 columns from the first row Ra1 to the fourth row Ra4 and the first column C1 to the fourth column C4. Hereinafter, each first quadrangle is referred to as Sa11, Sa12 ... Sa44 according to the position of the matrix. In FIG. 4A, the first quadrangle Sa is hatched.

Each first quadrangle Sa is a quadrangle having the same shape. Sa11 and Sa12 are arranged side by side in the row direction so that the third vertex P3a of Sa11 and the first vertex P1a of Sa12 overlap each other. Sa11 and Sa21 are arranged side by side in the column direction so that the fourth vertex P4a of Sa11 and the second vertex P2a of Sa21 overlap each other. Further, each first quadrangle Sa lacks a second side L2a. In this way, the first quadrangle Sa lacking the sides at the same position is arranged side by side in the row direction and the column direction with the vertices overlapped. The pattern shape of the first metal thin wire 20 can also be expressed as a shape in which parallelograms are laid out so that the short sides overlap each other and the long sides overlap each other by half of the long sides. The parallelogram is a shape in which two first quadrilaterals are connected, the short side is equal to one side of the first quadrangle, and the long side is twice as long as one side of the first quadrangle.

FIG. 4B shows only the second metal wire 30 among the metal wires of FIG. The second metal wire 30 in FIG. 4B is a pattern of the second metal wire 30 seen from the first surface 11a side of the transparent base material 11. The second quadrangle Sb is spread in the first row Rb1 to the fourth row Rb4 and the fourth row and four columns from the first column C1 to the fourth column C4. Each second quadrangle is called Sb11, Sb12 ... Sb44. In FIG. 4B, the second quadrangle Sb is hatched.

Each second quadrangle Sb has the same shape as the first quadrangle Sa. Sb11 and Sb12 are arranged side by side in the row direction so that the third vertex P3b of Sb11 and the first vertex P1b of Sb12 overlap each other. Sb11 and Sb21 are arranged side by side in the column direction so that the fourth vertex P4b of Sb11 and the second vertex P2b of Sb21 overlap each other. Further, each second quadrangle lacks a first side L1b. In this way, the second quadrangle Sb lacking the sides at the same position is arranged so as to overlap the vertices in the row direction and the column direction. The pattern shape of the second metal thin wire 30 is a shape in which parallelograms are laid out so that the short sides overlap each other and the long sides overlap each other by half of the long sides. The parallelogram is a shape in which two second quadrilaterals are connected, the short side is equal to one side of the second quadrangle, and the long side is twice as long as one side of the second quadrangle. The parallelogram formed by the first metal thin wire 20 and the parallelogram formed by the second metal thin wire 30 are axisymmetric with respect to the second diagonal line.

When observed from the first surface 11a side of the transparent base material 11 with reference to FIG. 2, the second quadrangle Sb is only half the distance of the diagonal line (second diagonal line H2a) in the column direction of the first quadrangle Sa. It is arranged at a position moved in the column direction from the first quadrangle Sa. In other words, the second quadrangle is arranged so that the second vertex P2b of the second quadrangle Sb11 overlaps with the intersection Qa of the diagonal lines of the first quadrangle Sa11. When the conductive sheet 10 is observed from the first surface 11a side of the transparent base material 11, a plurality of parallelograms formed by connecting the midpoints of the opposite sides of the first quadrangle and the second quadrangle are arranged. There are two types of parallelograms, one is a parallelogram whose long side extends diagonally to the right, and the other is a parallelogram whose long side extends diagonally to the left. The two types of parallelograms are axisymmetric with respect to the second diagonal. Two sets of parallelograms having long sides extending in the same direction are arranged side by side so as to share the long side to form one set, and two types of parallelogram sets are arranged alternately side by side.

With reference to FIG. 5, the method of laying the first quadrangle and the second quadrangle will be described by partially extracting the thin metal wire.
First, each first quadrangle laid on the first surface 11a of the transparent substrate 11 lacks one side so as not to lack both sides adjacent in the row or column direction with the apex in between. .. In FIG. 5A, the first quadrangle Sa51 and Sa52 are arranged so as to overlap the vertices and be adjacent to each other in the row direction. Here, the second side L2a of Sa51 and the first side L1a of Sa52 are sides adjacent to each other in the row direction with the third vertex P3a of Sa51 (or the first vertex P1a of Sa52) interposed therebetween. The second side L2a of Sa51 and the first side L1a of Sa52 are line-symmetrical about a straight line parallel to the second diagonal line passing through the third vertex of Sa51. If the second side L2a of Sa51 and the first side L1a of Sa52 are lacking as shown by the dotted lines in the figure, a dogleg-shaped concave hexagon formed by connecting three quadrangles is formed. If there is such a concave hexagon, pattern appearance is likely to occur due to the difference in density of fine metal wires. Therefore, in order to avoid a concave hexagon, each first quadrangle does not lack both sides adjacent to each other in the row direction or the column direction with the apex in between. Here, the quadrangle adjacent to the row direction has been described, but in the quadrangle adjacent to the column direction, both sides adjacent to each other in the column direction are not missing. The second quadrangle is also arranged according to this rule.

Secondly, when the first quadrangle and the second quadrangle are overlapped, that is, when the first quadrangle and the second quadrangle are observed from the first surface 11a side of the transparent base material 11, the missing side of the first quadrangle Make sure that the missing sides of the second quadrangle do not intersect. With reference to FIG. 5B, the first quadrangle is arranged on the first surface 11a of the transparent base material 11, and the second quadrangle is arranged on the second surface 11b. The four first quadrangles of Sa61, Sa62, Sa71, and Sa72 are arranged so that the vertices are overlapped and arranged in 2 rows and 2 columns. Each first quadrangle lacks a second side L2a. On the other hand, Sb61 and Sb62 formed on the second surface 11b of the transparent base material 11 are arranged side by side in the row direction with their vertices overlapped. Sb61 is formed at a position moved in the column direction by a distance of 1/2 of the second diagonal line H2a from Sa61. Sb61 and Sb62 each lack a third side L3a. At this time, since the missing second side L2a of Sa71 and the missing third side L3b of Sb61 intersect with each other, a hollow portion where no metal fine wire is formed is created, and the metal fine wire is sparse and dense. Pattern appearance due to the difference is likely to occur. Therefore, in order to avoid the occurrence of pattern appearance, each of the second quadrilaterals is configured to lack one side that does not intersect with the missing side of the first quadrangle.

Third, when the first quadrangle and the second quadrangle are overlapped, that is, when the first quadrangle and the second quadrangle are observed from the first surface 11a side of the transparent base material 11, the second quadrangle is relative to the first quadrangle. , The sides in the same direction as each side of the first quadrangle are arranged so as not to overlap. By doing so, the first metal thin wire 20 and the second metal thin wire 30 are configured so that the lines in the same direction do not overlap. This is because if the metal thin wires in the same direction are designed to overlap each other, the width of the metal thin wires may appear thick due to manufacturing tolerances when the first metal thin wire and the second metal fine wire are observed from the first surface.

The length of one side of the first quadrangle Sa and the second quadrangle Sb is preferably 300 to 900 μm. By setting it in such a range, it is possible to prevent the occurrence of pattern appearance due to the dense arrangement of the fine metal wires and to prevent the increase in the resistance value due to the sparse arrangement of the fine metal wires.

Examples of the shape of the first quadrangle Sa and the second quadrangle Sb include a rhombus or a square. With these shapes, the vertices can be overlapped and arranged side by side in the row direction and the column direction. The shapes of the first quadrangle Sa and the second quadrangle Sb may be the same or different. If the shapes of the first quadrangle Sa and the second quadrangle Sb are the same, the design load is reduced. Even when the shapes of the first quadrangle Sa and the second quadrangle Sb are different, it is preferable that the sides at the same position in each quadrangle are parallel.

In order to avoid the density of the first metal wire and the second metal wire, it is preferable that the vertices of the second quadrangle Sb are not arranged close to each side of the first quadrangle Sa. Specifically, one of the vertices of the second quadrangle Sb is arranged in the quadrangle connecting the point where the first diagonal line H1a of the first quadrangle Sa is divided into three and the point where the second diagonal line H2a is divided into three. Is preferable. That is, in a quadrangle centered on the intersection Qa of the diagonal lines of the first quadrangle, with a line segment having a length of 1/3 of the first diagonal line H1a and a line segment having a length of 1/3 of the second diagonal line H2a as diagonal lines. It is preferable to arrange the vertices of the second quadrangle Sb. Further, it is preferable to arrange the second quadrangle Sb so that the apex of the second quadrangle Sb is located at the intersection Qa of the diagonal lines of the first quadrangle Sa. By doing so, it is possible to prevent the pattern from appearing due to the bias of the arrangement of the first metal wire and the second metal wire.

The conductive sheet 10 is a method of forming a metal film including a blackening layer on a transparent base material 11 by a sputtering method or a metal leaf transfer and patterning by exposure / etching, or a method of patterning conductive ink on the transparent base material 11. It can be manufactured by the method of printing. When patterning is performed by exposure / etching, a metal film including a blackening layer can be formed on both sides of the transparent substrate 11, and both sides can be exposed / etched at the same time.

From the above, in the conductive sheet 10 according to the first embodiment, a plurality of first squares Sa formed so as to be arranged side by side in the row direction and the column direction on the first surface 11a of the transparent base material 11. One metal wire is provided, and each of the first quadrangles is configured to lack one side without missing both sides adjacent to each other in the row direction or the column direction with the apex in between. Since the first quadrangles of the same shape are arranged side by side in the row direction and the column direction, it is difficult to create dense and sparse parts of the metal fine lines, and it is possible to suppress the occurrence of pattern appearance due to the difference in the density of the metal fine lines. can. On the other hand, by configuring the first quadrangle so as to lack one side, the pattern of the fine metal lines does not repeat the figure of the same shape, and the pattern can be changed to suppress the occurrence of moire. These patterns can be seen and the occurrence of moire can be suppressed by a configuration having a low design load of lacking one side of the quadrangle. Furthermore, by making sure that each of the first quadrilaterals does not lack both sides adjacent to each other in the row direction or the column direction with the apex in between, the first metal wire does not form a concave hexagon, so that the metal wire is not formed. It is possible to further suppress the occurrence of pattern appearance due to the difference in density.

In the conductive sheet 10, a plurality of second quadrangles Sb are arranged side by side in the row direction and the column direction on the second surface 11b of the transparent base material 11, and the lines in the same direction as the first metal thin line do not overlap. It comprises a plurality of second metal wires formed in such a manner, and each of the second quadrilaterals is configured to lack one side without missing both sides adjacent in the row direction or the column direction across the apex. It is configured to lack one side that does not intersect the missing side of one quadrangle. By preventing the lines in the same direction from overlapping the first metal wire and the second metal wire, it is possible to prevent the width of the metal wire from appearing thick when the first metal wire and the second metal wire are overlapped and observed. be able to. Further, since the missing side of the first quadrangle and the missing side of the second quadrangle do not intersect, the area of the portion where the thin metal wire is not formed does not increase, and the occurrence of pattern appearance due to the difference in the density of the fine metal wire is prevented. be able to.

The conductive sheet 10 is configured such that each first quadrangle lacks a second side and each second quadrangle lacks a first side. Since the quadrangles lacking the sides at the same position are repeatedly arranged and designed, the design load can be further reduced.
Further, since the second quadrangle is arranged so that the second vertex P2b of the second quadrangle Sb overlaps with the intersection Qa of the diagonal lines of the first quadrangle Sa, it is possible to prevent the metal fine lines from being densely formed and the pattern appearance. Can be done.
When the conductive sheet 10 is observed from the first surface 11a side of the transparent base material 11, two types of parallelograms formed by connecting the midpoints of the opposite sides of the first quadrangle and the second quadrangle are formed by the same type of parallelogram. Since it looks like two quadrilaterals are arranged alternately as a set, it is possible to suppress moire and pattern appearance at the same time by using a pattern that changes while maintaining periodicity.

In the above first embodiment, the pattern shape of the thin metal wire is the shape shown in FIG. 2, but the pattern shape is not limited to this. With reference to FIGS. 6 to 12, modifications A to G of the pattern shape of the thin metal wire will be described. In FIGS. 6 to 12, the first metal wire on the first surface 11a side of the transparent substrate 11 is represented by a solid line, and the metal wire on the second surface 11b side is represented by a broken line.

<Modification example A>
The conductive sheet 10A according to the modification A will be described with reference to FIG.
FIG. 6 is a partially enlarged plan view of the transparent base material 11 in which the pattern of fine metal lines is observed from the first surface 11a side. In the conductive sheet 10A, the first metal wire 20A is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30A is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the row direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (first diagonal line H1a) in the row direction of the first quadrangle Sa. In other words, the first vertex P1b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa and the second quadrangle Sb are arranged is referred to as the first row R1 and the second row R2, and the columns in which the first quadrangle Sa is arranged are the first column Ca1, the second column Ca2, and the second. The columns in which the quadrilaterals Sb are arranged are indicated by arrows as the first column Cb1 and the second column Cb2. Each first quadrangle Sa lacks a second side L2a. Each second quadrangle lacks a second side L2a.

<Modification example B>
The conductive sheet 10B according to the modified example B will be described with reference to FIG. 7.
In the conductive sheet 10B, the first metal wire 20B is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30B is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the row direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (first diagonal line H1a) in the row direction of the first quadrangle Sa. In other words, the first vertex P1b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa and the second quadrangle Sb are arranged is referred to as the first row R1 and the second row R2, and the columns in which the first quadrangle is arranged are the first column Ca1, the second column Ca2, and the second quadrangle. The columns in which the Sbs are arranged are indicated by arrows as the first column Cb1 and the second column Cb2. Each first quadrangle Sa lacks a second side L2a. The second quadrangle Sb of the first row R1 lacks the second side L2b, and the second quadrangle Sb of the second row R2 lacks the fourth side L4b.

<Modification example C>
The conductive sheet 10C according to the modified example C will be described with reference to FIG.
In the conductive sheet 10C, the first metal wire 20C is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30C is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the row direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (first diagonal line H1a) in the row direction of the first quadrangle Sa. In other words, the first vertex P1b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa and the second quadrangle Sb are arranged is referred to as the first row R1 and the second row R2, and the columns in which the first quadrangle Sa is arranged are referred to as the first column Ca1 and the second column Ca2. The columns in which the two quadrangles Sb are arranged are indicated by arrows as the first column Cb1 and the second column Cb2. Each first quadrangle Sa lacks a second side L2a. The second quadrangle Sb of the first row R1 lacks the second side L2b, and the second quadrangle Sb of the second row R2 lacks the third side L3b.

<Modification D>
The conductive sheet 10D according to the modified example D will be described with reference to FIG. 9.
In the conductive sheet 10D, the first metal wire 20D is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30D is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the column direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (second diagonal line H2a) in the column direction of the first quadrangle Sa. In other words, the second vertex P2b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa is arranged is the first row Ra1, the second row Ra2, and the row in which the second quadrangle Sb is arranged is the first column Rb1, and the first quadrangle Sa and the second quadrangle Sb are arranged. The columns are indicated by arrows as the first column C1 and the second column C2. The first quadrangle Sa of the first row Ra1 lacks the second side L2a, and the first quadrangle Sa of the second row Ra2 lacks the first side L1a. Each second quadrangle Sb lacks a first side L1b.

<Modification example E>
The conductive sheet 10E according to the modified example E will be described with reference to FIG.
In the conductive sheet 10E, the first metal wire 20E is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30E is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the row direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (first diagonal line H1a) in the row direction of the first quadrangle Sa. In other words, the first vertex P1b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa and the second quadrangle Sb are arranged is referred to as the first row R1 and the second row R2, and the columns in which the first quadrangle Sa is arranged are the first column Ca1, the second column Ca2, and the second. The columns in which the quadrilaterals Sb are arranged are indicated by arrows as the first column Cb1 and the second column Cb2. The first quadrangle Sa of the first row R1 lacks the second side L2a, and the first quadrangle Sa of the second row R2 lacks the first side L1a. The second quadrangle Sb of the first row R1 lacks the second side L2b, and the second quadrangle Sb of the second row R2 lacks the third side L3b.

<Modification example F>
The conductive sheet 10F according to the modified example F will be described with reference to FIG.
In the conductive sheet 10F, the first metal wire 20F is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30F is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the row direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (first diagonal line H1a) in the row direction of the first quadrangle Sa. In other words, the first vertex P1b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa and the second quadrangle Sb are arranged is referred to as the first row R1 and the second row R2, and the columns in which the first quadrangle Sa is arranged are the first column Ca1, the second column Ca2, and the second. The columns in which the quadrilaterals Sb are arranged are indicated by arrows as the first column Cb1 and the second column Cb2. The first quadrangle Sa of the first row R1 lacks the second side L2a, and the first quadrangle Sa of the second row R2 lacks the fourth side L4a. The second quadrangle Sb of the first row R1 lacks the second side L2b, and the second quadrangle Sb of the second row R2 lacks the first side L1b.

<Modification example G>
The conductive sheet 10G according to the modified example G will be described with reference to FIG.
In the conductive sheet 10G, the first metal wire 20G is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30G is formed on the second surface 11b. The first quadrangle Sa and the second quadrangle Sb are arranged so as to overlap the vertices in the row direction and the column direction. The second quadrangle Sb is arranged at a position moved in the column direction from the first quadrangle Sa by a distance of 1/2 of the diagonal line (second diagonal line H2a) in the column direction of the first quadrangle Sa. In other words, the second vertex P2b of the second quadrangle Sb is arranged so as to overlap the intersection Qa of the diagonal lines of the first quadrangle. The row in which the first quadrangle Sa is arranged is the first row Ra1, the second row Ra2, the row in which the second quadrangle Sb is arranged is the first row Rb1, and the first quadrangle Sa and the second quadrangle Sb are arranged. The columns are shown as the first column C1 and the second column C2. The first quadrangle Sa of the first row Ra1 lacks the second side L2a, and the first quadrangle Sa of the second row Ra2 lacks the third side L3a. Each second quadrangle Sb lacks a fourth side L4b.

Similar to the first embodiment, the conductive sheet according to the modifications A to G can suppress both pattern appearance and moire with a configuration having a low design load of lacking one side of the quadrangle.

In the first embodiment and the modifications A to G described above, both the first quadrangle Sa and the second quadrangle Sb are configured to lack one side, but only the first quadrangle Sa lacks one side. It may be configured. Such variants H and I will be described with reference to FIGS. 13 and 14.

<Modification example H>
The conductive sheet 10H according to the modified example H will be described with reference to FIG.
In the conductive sheet 10H, the first metal wire 20H is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30H is formed on the second surface 11b. The first metal thin wire 20H has the first quadrangle Sa overlapping the vertices and arranged side by side in the row direction and the column direction, and the second metal thin wire 30H has the second quadrangle Sb overlapping the vertices in the row direction and the column direction. They are formed so that they are arranged side by side. The second quadrangle Sb may be arranged so that the first vertex P1b or the second vertex P2b overlaps with the diagonal intersection Qa of the first quadrangle Sa. The rows and columns in which the first quadrangle Sa is arranged are shown as the first row R1, the second row R2, the first column C1, and the second column C2. The first quadrangle Sa of the first row R1 lacks the second side L2a, and the first quadrangle Sa of the second row R2 lacks the first side L1a. Each second quadrangle Sb is a quadrangle in which four sides are aligned without lacking sides.

<Modification I>
The conductive sheet 10I according to the modified example I will be described with reference to FIG.
In the conductive sheet 10I, the first metal wire 20I is formed on the first surface 11a of the transparent base material 11, and the second metal wire 30I is formed on the second surface 11b. The first metal wire 20I has the first quadrangle Sa overlapping the vertices and arranged side by side in the row direction and the column direction, and the second metal wire 30I has the second quadrangle Sb overlapping the vertices in the row direction and the column direction. They are formed so that they are arranged side by side. The second quadrangle Sb may be arranged so that the first vertex P1b or the second vertex P2b overlaps with the diagonal intersection Qa of the first quadrangle Sa. The rows and columns in which the first quadrangle Sa is arranged are shown as the first row R1, the second row R2, the first column C1, and the second column C2. Each first quadrangle Sa lacks a second side L2a. Each second quadrangle Sb is a quadrangle in which four sides are aligned without lacking sides.

Even in the conductive sheet according to the modified examples H and I, the pattern appearance and the suppression of moire can be realized by the configuration having a low design load of lacking one side of the quadrangle.

In the first embodiment and the modifications A to I described above, the sides of the first quadrangle and the second quadrangle are straight lines, but the sides of the first quadrangle and the second quadrangle may be other than straight lines. Such modifications J to L will be described with reference to FIGS. 15 to 17. Since the arrangement of the first quadrangle Sa and the second quadrangle Sb and the method of lacking the sides are the same as those in the first embodiment, the description thereof will be omitted.

<Modification example J>
The conductive sheet 10J according to the modified example J will be described with reference to FIG.
In the conductive sheet 10J, the sides of the first quadrangle Sa and the second quadrangle Sb have a wavy line shape. One side of each quadrangle is a wavy line in which four arcs having a central angle of 90 ° are continuously combined so that peaks and valleys are alternately formed.

The conductive sheet 10K according to the modified example K will be described with reference to FIG.
In FIG. 16, the sides of the first quadrangle Sa and the second quadrangle Sb have a bending line shape. One side of each quadrangle is a zigzag-shaped bending line in which straight lines are continuously combined so that peaks and valleys are alternately formed.

A modification L of the pattern shape of the thin metal wire will be described with reference to FIG.
In FIG. 17, the sides of the first quadrangle Sa and the second quadrangle Sb have different bending line shapes. One side of each quadrangle is a bend line in which a quarter of a hexadecagon is continuously combined so that peaks and valleys are formed alternately.

Similar to the above-mentioned first embodiment and the modified examples A to I, the conductive sheet according to the modified examples J to L can realize the pattern appearance and the suppression of moire in a configuration with a low design load, and also causes glare. It can be suppressed. This is because the side of the quadrangle, which is a thin metal wire, is a wavy line or a bending line, so that the light beam generated by the light incident from a point light source such as sunlight diffracted by the thin metal wire can be suppressed.

Next, the second embodiment of the present invention will be described with reference to FIG.
<Second Embodiment>

With reference to FIG. 18A, the touch sensor 100 according to the second embodiment of the present invention includes a transparent base material 11, a plurality of first electrodes 200a formed on the first surface of the transparent base material 11, and a plurality of first electrodes 200a. A first connecting portion 210a formed at each end of a plurality of first electrodes 200a, a first terminal portion 220a connected to an external wiring, and a first connecting portion 210a and a first terminal portion 220a are connected to each other. It is provided with one routing wiring 230a. Further, the touch sensor 100 includes a plurality of second electrodes 200b formed on the second surface of the transparent base material 11, second connection portions 210b formed at the ends of the plurality of second electrodes 200b, and external wiring. It is provided with a second terminal portion 220b connected to the second connection portion 210b and a second routing wiring 230b connecting the second connection portion 210b and the terminal portion 220b.

The first surface of the transparent base material 11 is divided into an operation region V1 and a peripheral region V2. The operation area V1 is an area of the touch sensor 100 where an input operation is performed by the user, and the peripheral area V2 is an area covered with a frame-shaped decorative layer or the like of the cover base material after assembly. A plurality of first electrodes 200a and a first dummy portion 240a are provided in the operation region V1 on the first surface of the transparent substrate 11, and a first connection portion 210a, a first terminal portion 220a, and a first routing wiring are provided in the peripheral region V2. 230a are formed respectively.

The plurality of first electrodes 200a are formed in the operation region V1. The plurality of first electrodes 200a have a band shape and are arranged on the first surface of the transparent base material 11 so as to extend in the y-axis direction and line up four in the x-axis direction. The plurality of first electrodes 200a are composed of the plurality of first metal thin wires 20 described in the first embodiment. These plurality of first electrodes 200a constitute electrodes of the touch sensor.

The size of the plurality of first electrodes 200a is not particularly limited because it is determined by the size and resolution of the operation region V1, but the length of one side of the first quadrangle constituting the first metal thin wire 20 is A, the first. Assuming that the width of the electrode 200a is W and the width of the first dummy portion 240a is X, it is preferable that W / A is an integer of 2 or more. By doing so, even if any one of the thin metal wires is broken, the continuity of the electrodes can be maintained and the operation of the touch sensor can be maintained. Further, it is preferable that the width W of each of the plurality of first electrodes 200a is the same, W / A is an integer of 2 or more, and X / A is an integer of 0 or more. By doing so, since the area of the thin metal wire contained in one electrode is constant, it is possible to obtain a touch sensor that operates well without the resistance value varying for each electrode.

The first dummy portion 240a is formed in a region of the operation region V1 in which a plurality of first electrodes 200a are not formed. The first electrode 200a and the first dummy portion 240a are arranged alternately. Like the plurality of first electrodes 200a, the first dummy portion 240a is composed of the plurality of first metal thin wires 20 described in the first embodiment. When the region K in FIG. 18A is enlarged with reference to FIG. 18B, the first electrode 200a and the first dummy portion 240a are disconnected so as not to be electrically connected by the first disconnection portion 250a. ing. The first disconnection portion 250a is formed so that the first metal wire 20 constituting the first electrode 200a is partially disconnected, and the first electrode 200a and the first dummy portion 240a are separated by the first disconnection portion 250a. .. The first disconnection portion 250a is formed by disconnecting all the thin metal wires on the boundary line between the first electrode 200a and the first dummy portion 240a. The straight line connecting the first disconnection portion 250a is parallel to the y-axis. The width of the first disconnection portion 250a is preferably 1 to 20 μm. When the width of the first disconnection portion 250a is set in this range, it is possible to prevent the boundary line between the first electrode and the first dummy portion from being visible due to the presence or absence of the thin metal wire. When forming the first broken wire portion 250a, it is preferable to break the wire so that the ends of the broken first metal thin wire 20 are at right angles. If a thin metal wire extending diagonally to the right is broken parallel to the y-axis as shown in FIG. 18 (b), the end of the broken metal thin wire may have an acute angle, which may deteriorate the etching accuracy during manufacturing. Is. Further, it is preferable that the first disconnection portion 250a is located at the midpoint of any side of the first quadrangle. When the second quadrangle is arranged so that the vertices of the second quadrangle constituting the second metal thin line on the second surface overlap the diagonal intersections of the first quadrangle constituting the first metal thin line, the inside of the sides of the first quadrangle This is because the points often intersect the sides of the second quadrangle, and the disconnection of the first metal thin wire 20 becomes less noticeable.

The first connection portion 210a is for connecting the first electrode 200a and the first routing wiring 230a. The first metal wire 20 constituting the first electrode 200a can be collectively connected to the first routing wiring 230a by the first connecting portion 210a. The first connection portion 210a has a rectangular shape and is formed at one end in the longitudinal direction of the band-shaped first electrode 200a. The first connection portion 210a is formed in the peripheral region V2 so as to overlap a part of the plurality of first metal thin wires 20 constituting the plurality of first electrodes 200a. The first electrode 200a extends to the boundary line of the operation region V1, and one side of the rectangle of the first connection portion 210a overlaps the boundary line between the operation region V1 and the peripheral region V2. The width of the first connection portion 210a is equal to the width of the first electrode 200a. Similar to the first metal wire 20, the first connection portion 210a is composed of a laminated film in which a first blackening layer, a metal layer, and a second blackening layer are laminated in this order from the transparent base material 11 side.

The first terminal portion 220a is for connecting the touch sensor 100 to an external wiring such as a flexible wiring board, and is formed near the outer edge on the transparent base material 11. The first routing wiring 230a is for connecting the first electrode 200a and the first terminal portion 220a, and is connected to the first terminal portion 220a so as to be bent in the middle and gathered near the center. The first terminal portion 220a and the first routing wiring 230a are laminated in the order of the first blackening layer, the metal layer, and the second blackening layer from the transparent base material 11 side, similarly to the first metal thin wire 20. ..

On the other hand, the operation region V1 on the second surface of the transparent substrate 11 has a plurality of second electrodes 200b and the second dummy portion 240b, and the peripheral region V2 has the second connection portion 210b, the second terminal portion 220b, and the second pull. The turning wiring 230b is formed respectively. The plurality of second electrodes 200b are arranged on the second surface of the transparent base material 11 so as to extend in the x-axis direction and line up five in the y-axis direction. The second connecting portion 210b is formed at one end in the longitudinal direction of the plurality of band-shaped second electrodes 200b. The plurality of second electrodes 200b are composed of the plurality of second metal thin wires 30 described in the first embodiment. These plurality of second electrodes 200b constitute electrodes of the touch sensor. The preferred form of the second electrode 200b, the second dummy portion 240b, the second connection portion 210b, the second terminal portion 220b, and the second routing wiring 230b formed on the second surface is the same as that of the first surface.

The first terminal portion 220a and the second terminal portion 220b formed on both sides of the transparent base material 11 are connected to a flexible printed substrate (not shown). The flexible printed circuit board is connected to a control unit that realizes a capacitive touch detection. When a conductor such as a user's finger or stylus is close to or separated from each other, the control unit detects the current flowing according to the change in capacitance generated in the first electrode 200a and the second electrode 200b, so that the user can perform a touch operation. And the touch position can be detected.

A method of manufacturing the touch sensor 100 will be described.
First, a first blackening film layer, a metal film layer, and a second blackening film layer are formed on both surfaces of the transparent substrate 11 in this order by a sputtering method or metal leaf transfer. Further, a resist layer is formed on the second blackening film layer, and the resist layer is patterned by exposure and development using a pattern mask. After that, the patterned resist layer is used as an etching mask to etch the first blackened film layer, the metal film layer, and the second blackened film layer, whereby a plurality of fine metal wires are formed on both sides of the transparent base material 11. The electrode, dummy part, disconnection part, connection part, terminal part, and routing wiring are formed at the same time.

From the above, in the touch sensor 100 according to the second embodiment, the first electrode 200a and the second electrode 200b are composed of a plurality of first metal thin wires and second metal thin wires according to the first embodiment, so that the appearance is good. A touch sensor can be obtained.

Further, in the operation region V1, since the dummy portion is formed in the portion where the electrode is not formed, the bone-seeing phenomenon in which the electrode pattern shape is observed by the operator due to the presence or absence of the electrode is suppressed and the visual recognition is performed. It is possible to prevent deterioration of sex. Since the dummy portion is composed of the plurality of first metal wire and the second metal wire according to the first embodiment as in the case of the electrode, pattern appearance and moire can be suppressed in both the dummy portion and the electrode. Therefore, the visibility of the operation area V1 of the touch sensor 100 can be improved. Further, in the manufacturing method of the touch sensor 100 according to the second embodiment, the electrodes, the dummy portion, the connecting portion, the terminal portion, and the routing wiring can be simultaneously formed on both surfaces of the transparent base material 11, which complicates the manufacturing process. Can be prevented.

In the above embodiment, the thin metal wires are formed on both sides of the transparent base material 11, but the fine metal wires may be formed only on one side of the transparent base material 11. Even in that case, pattern appearance and suppression of moire can be realized by a configuration with a low design load.

In the above embodiment, the case where the conductive sheet is used as the electrode of the touch sensor has been described, but the application of the conductive sheet is not limited to the touch sensor. For example, the conductive sheet according to the present invention can be used for an antenna, a heater, and the like.

In the above embodiment, the first metal wire and the second metal wire are laminated in the order of the first blackening layer, the metal layer, and the second blackening layer, but the laminated structure of the metal thin wire is not limited to this. For example, it may be configured to have only a metal layer, a configuration in which a metal layer and a blackened layer are laminated in this order from the transparent substrate side, or a configuration in which the upper surface and side surfaces of the metal layer formed on the transparent substrate are covered. A blackened layer may be formed. Further, the metal layer may be completely surrounded by a blackening layer.

In the above embodiment, the first electrode and the second electrode have a band shape, but the shape of the electrodes is not limited to this. Other shapes of the electrodes may be, for example, a rhombic shape in which the vertices are connected to each other or a comb-teeth shape. Further, the number of electrodes, the position of the routing wiring, and the position of the terminal portion are not particularly limited.

In the above embodiment, the dummy portion is composed of the metal fine wire according to the first embodiment, but the metal fine wire pattern of the dummy portion is not limited to this. The dummy portion may be formed of a fine metal wire pattern that can suppress the appearance of the pattern and the occurrence of moire.

In the above embodiment, electrodes are formed on both sides of the transparent base material 11 of the touch sensor 100, but the configuration of the touch sensor is not limited to this. Two transparent base materials having electrodes formed on one surface may be bonded so that the other side of the transparent base material faces each other, or the other side of the transparent base material is overlapped on the electrodes via an adhesive layer. You may stick them together in this way.

In the above embodiment, the connection portion is formed at one end of the electrode, but the connection portion may be formed at both ends in the longitudinal direction of the electrode. For example, where the second connection portion 210b is formed at the left end portion of the second electrode 200b, the second connection portion 210b may be further formed at the right end portion of the second electrode 200b. In this case, a second terminal portion 220b is also formed on the right side of the first terminal portion 220a, and each second routing wiring 230b is connected to the second terminal portion 220b. The position of the terminal portion and the arrangement of the routing wiring are not particularly limited.

In the above embodiment, a plurality of electrodes, dummy portions, connection portions, terminal portions, and routing wires are formed at the same time, but the manufacturing method of the touch sensor 100 is not limited to this. For example, after forming the fine metal wire according to the first embodiment in the operation region V1, the broken metal wire may be broken by a laser to form a broken wire portion, and a plurality of electrodes and a dummy portion may be formed. Further, after forming a plurality of electrodes and dummy portions in the operation region V1, the connection portion, the terminal portion, and the routing wiring may be formed in the peripheral region V2. Further, the transparent substrate 11 may be formed on one side at a time instead of being formed on both sides at the same time.

In the above embodiment, the central angle of the arc constituting the wavy line is 90 ° in the modified example J, but the central angle may be set between 45 ° and 90 °. If the central angle is set in this range, the light beam can be suppressed without excessively increasing the resistance value. Further, although the number of arcs constituting the wavy line was four, the number of arcs may be other than this. The number of arcs may be changed for each side or each quadrangle.

10 Conductive sheet 20 1st metal thin wire 30 2nd metal thin wire Sa 1st quadrangle Sb 2nd quadrangle 15 2nd blackening layer 100 Touch sensor 200a 1st electrode 210a 1st connection part 220a 1st terminal part 230a 1st routing wiring 240a 1st dummy part 200b 2nd electrode 210b 2nd connection part 220b 2nd terminal part 230b 2nd routing wiring 240b 2nd dummy part

Claims (10)

With a transparent base material,
A plurality of first metal thin wires formed on the first surface of the transparent substrate are provided so that the plurality of first quadrangles are arranged side by side in the row direction and the column direction so that the vertices are overlapped with each other.
Each of the first quadrangles is a conductive sheet configured to lack one side without lacking both sides adjacent to each other in the row direction or the column direction with the apex interposed therebetween. The conductive sheet according to claim 1, wherein the first quadrangle lacks sides at the same position as the first quadrangle arranged in the same row or column. On the second surface of the transparent base material so that a plurality of second quadrangles are arranged side by side in the row direction and the column direction so that the vertices overlap each other and the lines in the same direction as the first metal thin line do not overlap. With a plurality of second metal wires formed in,
Each of the second quadrilaterals is configured to lack one side that does not intersect the missing side of the first quadrangle, without missing both sides adjacent in the row or column direction across the apex. , The conductive sheet according to claim 1 or 2. Each of the first rectangles lacks sides at the same position,
The conductive sheet according to claim 3, wherein each of the second quadrangles lacks a side located adjacent to the missing side of the first quadrangle. In the first quadrangle, the first quadrangle arranged in the same row lacks the same side, and the first quadrangle arranged in the adjacent row lacks a side located adjacent to the missing side in the row direction.
Or, in the first quadrangle, the first quadrangle arranged in the same row lacks the same side, and the first quadrangle arranged in the adjacent row lacks the side located adjacent to the missing side in the column direction.
The conductive sheet according to claim 2. The plurality of first metal wires and the plurality of second metal wires each constitute a plurality of first electrodes and a plurality of second electrodes, and are formed at the ends of the plurality of first electrodes and the plurality of second electrodes, respectively. The conductive sheet according to claim 4, which has the first connection portion and the second connection portion.
The terminal part connected to the external wiring and
A touch sensor including the first connection portion, a routing wiring for connecting the second connection portion and the terminal portion, and the like. The first electrode and the second electrode are formed in the operation region, and the first electrode and the second electrode are formed in the operation region.
The routing wiring is formed in a peripheral area other than the operation area, and is formed.
According to claim 8, a dummy portion not electrically connected to the first electrode and the second electrode is further provided in a region of the operation region in which the first electrode and the second electrode are not formed. The described touch sensor. The first electrode and the second electrode are band-shaped and have a band shape.
The touch sensor according to claim 7, wherein the first electrode, the second electrode, and a dummy portion are alternately arranged. The touch sensor according to claim 8, wherein the dummy portion is composed of the plurality of first metal wires or the plurality of second metal wires. A step of sequentially forming a first blackening film layer, a metal film layer, and a second blackening film layer on both sides of a transparent base material,
A plurality of first electrodes composed of a plurality of first metal fine wires on the first surface of the transparent base material, first connection portions formed at the ends of the plurality of first electrodes, and external wiring are connected. The first terminal portion to be formed and the first routing wiring connecting the first connection portion and the first terminal portion are composed of a plurality of second metal fine wires on the second surface of the transparent base material. A plurality of second electrodes, a second connection portion formed at each end of the plurality of second electrodes, a second terminal portion connected to external wiring, the second connection portion, and the second terminal portion. It is provided with a process of forming a second routing wiring for connecting to and at the same time.
The plurality of first metal wirings are formed on the first surface of the transparent substrate so that the plurality of first quadrangles are arranged side by side in the row direction and the column direction.
The plurality of second metal thin wires are the transparent base material so that the plurality of second quadrangles are arranged side by side in the row direction and the column direction, and the lines in the same direction as the first metal thin wires do not overlap. Formed on the second surface of
Each of the first quadrilaterals is configured to lack one side without missing both sides adjacent in the row or column direction with the apex in between.
Each of the second quadrilaterals is configured to lack one side that does not intersect the missing side of the first quadrangle, without missing both sides adjacent in the row or column direction across the apex. , How to make a touch sensor.

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