# US 2024/0201815 A1 · Conductive sheet, touch sensor, and method for manufacturing touch sensor

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- Number: US 2024/0201815 A1
- Document ID: US20240201815A1
- Status: Published application
- Kind: A1
- Application number: 18/287,578
- Filed: 2022-04-25
- Published: 2024-06-20
- Earliest claimed: 2021-05-20
- Assignees: Nissha Co., Ltd.
- Applicants: Nissha Co.,Ltd.
- Inventors: Satomi TERAYA
- Web page: https://patentgrep.com/patent/US20240201815A1

## CPC

- G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/0443: {using a single layer of sensing electrodes}
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F 3/0448: {Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality}
- G06F 3/047: using sets of wires, e.g. crossed wires
- H05K 1/0296: {Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 (H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18)}
- G06F 2203/04103: Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
- G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
- G06F 2203/04112: Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
- H05K 1/0393: {Flexible materials (H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups)}
- H05K 2201/0108: Transparent
- H05K 2201/09272: Layout details of angles or corners
- H05K 2201/09681: Mesh conductors, e.g. as a ground plane
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

A conductive sheet includes less visible thin metal wires. The conductive sheet includes a transparent substrate and a first conductive pattern on a first surface of the transparent substrate. The first conductive pattern includes multiple first thin metal wires extending in a first direction and arranged in a second direction. The first conductive pattern includes multiple second thin metal wires extending in the second direction and arranged in the first direction. The first thin metal wires extending in the first direction and the second thin metal wires extending in the second direction commonly include first bent wires at their intersections. The first thin metal wires and the second thin metal wires form first obtuse angles. The first bent wires connect first obtuse angles. The conductive sheet is incorporated in a touch sensor and a method of manufacturing the touch sensor.

## Claims

### Claim 1

A conductive sheet, comprising:
a transparent substrate; and
a first conductive pattern on a surface of the transparent substrate, the first conductive pattern including a plurality of first thin metal wires extending in a first direction and a plurality of second thin metal wires extending in a second direction and intersecting with the plurality of first thin metal wires, the plurality of first thin metal wires and the plurality of second thin metal wires being in a mesh with a plurality of first openings arranged consecutively in the first direction and the second direction,
the plurality of first thin metal wires and the plurality of second thin metal wires commonly including a plurality of first bent wires at intersections of the plurality of first thin metal wires and the plurality of second thin metal wires, and
the plurality of first bent wires connecting facing first obtuse angles formed by the plurality of first thin metal wires and the plurality of second thin metal wires,
each of the plurality of first thin metal wires including a first metal side extending from a first bent wire of the plurality of first bent wires to a first adjacent first bent wire of the plurality of first bent wires,
each of the plurality of second thin metal wires including a second metal side extending from the first bent wire to a second adjacent first bent wire of the plurality of first bent wires,
the first metal side and the second metal side facing each other across a connecting first bent wire of the plurality of first bent wires, the first metal side and the second metal side having a same length of 300 to 1300 μm, and
first bent wires of the plurality of first bent wires at two ends of the first metal side or at two ends of the second metal side being parallel to each other and each having a length of 8 to 20 μm.

### Claim 2

(canceled)

### Claim 3

(canceled)

### Claim 4 (depends on 1)

The conductive sheet according to claim 1, further comprising:
a second conductive pattern on another surface of the transparent substrate, the second conductive pattern including a plurality of third thin metal wires extending in the first direction without overlapping the plurality of first thin metal wires and a plurality of fourth thin metal wires extending in the second direction and intersecting with the plurality of third thin metal wires without overlapping the plurality of second thin metal wires, the plurality of third thin metal wires and the plurality of fourth thin metal wires being in a mesh with a plurality of second openings arranged consecutively in the first direction and the second direction,
the plurality of third thin metal wires and the plurality of fourth thin metal wires commonly including a plurality of second bent wires at intersections of the plurality of third thin metal wires and the plurality of fourth thin metal wires, and
the plurality of second bent wires connecting facing second obtuse angles formed by the plurality of third thin metal wires and the plurality of fourth thin metal wires.

### Claim 5 (depends on 4)

The conductive sheet according to claim 4, wherein
each of the plurality of third thin metal wires includes a third metal side extending from a second bent wire to an adjacent second bent wire of the plurality of second bent wires, each of the plurality of fourth thin metal wires includes a fourth metal side extending from a second bent wire to an adjacent second bent wire of the plurality of second bent wires, and the third metal side and the fourth metal side facing each other across a second bent wire of the plurality of second bent wires, wherein the third metal side and the fourth metal side have a same length of 300 to 1300 μm.

### Claim 6 (depends on 4)

The conductive sheet according to claim 4, wherein
second bent wires of the plurality of second bent wires at two ends of the third metal side or at two ends of the fourth metal side are parallel to each other and each having a length of 8 to 20 μm.

### Claim 7 (depends on 4)

The conductive sheet according to claim 4, wherein
each of the plurality of second bent wires is at a center of a corresponding first opening of the plurality of first openings.

### Claim 8 (depends on 4)

The conductive sheet according to claim 4, wherein
each of the plurality of second thin metal wires includes a plurality of first disconnected portions each including no thin metal wire between the first bent wire and the adjacent first bent wire of the plurality of first bent wires,
each of the plurality of third thin metal wires includes a plurality of second disconnected portions each including no thin metal wire between the second bent wire and the adjacent second bent wire of the plurality of second bent wires, and
the plurality of first disconnected portions have no intersection with the plurality of second disconnected portions.

### Claim 9 (depends on 8)

The conductive sheet according to claim 8, wherein
each of the plurality of second thin metal wires includes a plurality of the second metal sides and the plurality of first disconnected portions arranged alternately, and
each of the plurality of third thin metal wires includes a plurality of the third metal sides and the plurality of second disconnected portions arranged alternately.

### Claim 10 (depends on 4)

A touch sensor, comprising:
the conductive sheet according to claim 4, the conductive sheet including a plurality of the first conductive patterns serving as a plurality of first electrodes and a plurality of the second conductive patterns serving as a plurality of second electrodes, the conductive sheet including a plurality of first connectors on ends of the plurality of first electrodes and a plurality of second connectors on ends of the plurality of second electrodes;
a terminal connectable to external wiring; and
routing wiring connecting the plurality of first connectors and the plurality of second connectors to the terminal.

### Claim 11

A method for manufacturing a touch sensor, the method comprising:
sequentially forming a first blackened film layer, a metal film layer, and a second blackened film layer on opposite surfaces of a transparent substrate; and
simultaneously forming, on a first surface of the transparent substrate, a plurality of first electrodes each including a first conductive pattern, a plurality of first connectors on ends of the plurality of first electrodes, a first terminal connectable to external wiring, and first routing wiring connecting the plurality of first connectors and the first terminal, and, on a second surface of the transparent substrate, a plurality of second electrodes each including a second conductive pattern, a plurality of second connectors on ends of the plurality of second electrodes, a second terminal connectable to external wiring, and second routing wiring connecting the plurality of second connectors and the second terminal,
the first conductive pattern including a plurality of first thin metal wires extending in a first direction and a plurality of second thin metal wires extending in a second direction and intersecting with the plurality of first thin metal wires, the plurality of first thin metal wires and the plurality of second thin metal wires being in a mesh with a plurality of first openings arranged consecutively in the first direction and the second direction,
the second conductive pattern including a plurality of third thin metal wires extending in the first direction without overlapping the plurality of first thin metal wires and a plurality of fourth thin metal wires extending in the second direction and intersecting with the plurality of third thin metal wires without overlapping the plurality of second thin metal wires, the plurality of third thin metal wires and the plurality of fourth thin metal wires being in a mesh with a plurality of second openings arranged consecutively in the first direction and the second direction,
the plurality of first thin metal wires and the plurality of second thin metal wires commonly including a plurality of first bent wires at intersections of the plurality of first thin metal wires and the plurality of second thin metal wires,
the plurality of first bent wires connecting facing first obtuse angles formed by the plurality of first thin metal wires and the plurality of second thin metal wires,
the plurality of third thin metal wires and the plurality of fourth thin metal wires commonly including a plurality of second bent wires at intersections of the plurality of third thin metal wires and the plurality of fourth thin metal wires, and
the plurality of second bent wires connecting facing second obtuse angles formed by the plurality of third thin metal wires and the plurality of fourth thin metal wires,
each of the plurality of first thin metal wires including a first metal side extending from a first bent wire of the plurality of first bent wires to a first adjacent first bent wire of the plurality of first bent wires,
each of the plurality of second thin metal wires including a second metal side extending from the first bent wire to a second adjacent first bent wire of the plurality of first bent wires,
the first metal side and the second metal side facing each other across a connecting first bent wire of the plurality of first bent wires, the first metal side and the second metal side having a same length of 300 to 1300 μm, and
first bent wires of the plurality of first bent wires at two ends of the first metal side or at two ends of the second metal side being parallel to each other and each having a length of 8 to 20 μm.

### Claim 12 (depends on 11)

The method according to claim 11, wherein
each of the plurality of third thin metal wires includes a third metal side extending from a second bent wire of the plurality of second bent wires to an adjacent second bent wire of the plurality of second bent wires,
each of the plurality of fourth thin metal wires includes a fourth metal side extending from the second bent wire to an adjacent second bent wire of the plurality of second bent wires, and
the third metal side and the fourth metal side facing each other across a second bent wire of the plurality of second bent wires, wherein the third metal side and the fourth metal side have a same length of 300 to 1300 μm.

### Claim 13 (depends on 11)

The method according to claim 11, wherein
second bent wires of the plurality of second bent wires at two ends of the third metal side or at two ends of the fourth metal side are parallel to each other and each having a length of 8 to 20 μm.

### Claim 14 (depends on 11)

The method according to claim 11, wherein
each of the plurality of second thin metal wires includes a plurality of first disconnected portions each including no thin metal wire between the first bent wire and the adjacent first bent wire of the plurality of first bent wires and
each of the plurality of third thin metal wires includes a plurality of second disconnected portions each including no thin metal wire between the second bent wire and the adjacent second bent wire of the plurality of second bent wires.

### Claim 15 (depends on 14)

The method according to claim 14, wherein the plurality of first disconnected portions have no intersection with the plurality of second disconnected portions.

### Claim 16

A conductive sheet, comprising:
a transparent substrate;
a first conductive pattern on a surface of the transparent substrate, the first conductive pattern including a plurality of first thin metal wires extending in a first direction and a plurality of second thin metal wires extending in a second direction and intersecting with the plurality of first thin metal wires, the plurality of first thin metal wires and the plurality of second thin metal wires being in a mesh with a plurality of first openings arranged consecutively in the first direction and the second direction; and
a second conductive pattern on another surface of the transparent substrate, the second conductive pattern including a plurality of third thin metal wires extending in the first direction without overlapping the plurality of first thin metal wires and a plurality of fourth thin metal wires extending in the second direction and intersecting with the plurality of third thin metal wires without overlapping the plurality of second thin metal wires, the plurality of third thin metal wires and the plurality of fourth thin metal wires being in a mesh with a plurality of second openings arranged consecutively in the first direction and the second direction,
the plurality of first thin metal wires and the plurality of second thin metal wires commonly including a plurality of first bent wires at intersections of the plurality of first thin metal wires and the plurality of second thin metal wires,
the plurality of first bent wires connecting facing first obtuse angles formed by the plurality of first thin metal wires and the plurality of second thin metal wires,
the plurality of third thin metal wires and the plurality of fourth thin metal wires commonly including a plurality of second bent wires at intersections of the plurality of third thin metal wires and the plurality of fourth thin metal wires,
the plurality of second bent wires connecting facing obtuse angles formed by the plurality of third thin metal wires and the plurality of fourth thin metal wires,
each of the plurality of second thin metal wires including a plurality of first disconnected portions, each first disconnected portion including no thin metal wire between a first bent wire and an adjacent first bent wire of the plurality of first bent wires,
each of the plurality of third thin metal wires including a plurality of second disconnected portions, each second disconnected portion including no thin metal wire between a second bent wire and an adjacent second bent wire of the plurality of second bent wires, and
the plurality of first disconnected portions having no intersection with the plurality of second disconnected portions.

### Claim 17 (depends on 16)

The conductive sheet according to claim 16, wherein
each of the plurality of first thin metal wires includes a first metal side extending from the first bent wire to a first adjacent first bent wire of the plurality of first bent wires, and
each of the plurality of second thin metal wires includes a second metal side extending from the first bent wire to a second adjacent first bent wire of the plurality of first bent wires.

### Claim 18 (depends on 17)

The conductive sheet according to claim 17, wherein
each of the plurality of third thin metal wires includes a third metal side extending from the second bent wire to a first adjacent second bent wire of the plurality of second bent wires, and
each of the plurality of fourth thin metal wires includes a fourth metal side extending from the second bent wire to a second adjacent second bent wire of the plurality of second bent wires.

### Claim 19 (depends on 17)

The conductive sheet according to claim 17, wherein
each of the plurality of second thin metal wires includes a plurality of the second metal sides and the plurality of first disconnected portions arranged alternately.

### Claim 20 (depends on 18)

The conductive sheet according to claim 18, wherein
each of the plurality of third thin metal wires includes a plurality of the third metal sides and the plurality of second disconnected portions arranged alternately.

### Claim 21 (depends on 1)

The conductive sheet according to claim 1, wherein the plurality of first thin metal wires include a first blackened layer on a first side of a metal layer and a second blackened layer on a second side of the metal layer opposite the first side.

### Claim 22 (depends on 1)

The conductive sheet according to claim 1, wherein each of the plurality of second thin metal wires includes a plurality of first disconnected portions, each including no thin metal wire between the first bent wire and the adjacent first bent wire of the plurality of first bent wires.