Conductive sheet and touch panel

Patent metadata

Field	Value
Publication number	US-9877385-B2
Application number	US-201414310770-A
Country	US
Kind code	B2
Filing date	Jun 20, 2014
Priority date	Dec 22, 2011
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A conductive sheet includes: a substrate having a first main surface and a second main surface; and a first electrode pattern placed on the first main surface of the substrate. The first electrode pattern is made of metal thin wires, and includes a plurality of first conductive patterns that extend in a first direction. Each first conductive pattern includes, at least, inside thereof, a sub-nonconduction pattern that is electrically separated from the first conductive pattern. An area A of each first conductive pattern and an area B of each sub-nonconduction patterns satisfy a relation of 5%<B/(A+B)<97%. Accordingly, a conductive sheet and a touch panel having a high detection accuracy can be provided.

First claim

What is claimed is:

1. A conductive sheet, comprising: a substrate having a first main surface and a second main surface; and a first electrode pattern placed on the first main surface of the substrate, wherein the first electrode pattern is made of metal thin wires, and alternately includes: a plurality of first conductive patterns that extend in a first direction; and a plurality of first nonconductive patterns that are electrically separated from the plurality of first conductive patterns, wherein the first conductive patterns are formed of grids made of the metal thin wires intersecting with each other, each grid including an opening region surrounded by metal thin wires, each of the first conductive patterns includes, at least, inside thereof, a sub-nonconduction pattern that is electrically separated from the first conductive pattern, and wherein each sub-nonconduction pattern has a slit-like shape extending in the first direction, each first conductive pattern includes a plurality of first conductive pattern lines divided by each sub-nonconduction pattern, and an area A1 of each first conductive pattern and an area B1 of each sub-nonconduction pattern satisfy a following expression:
40%< B 1/( A 1+ B 1)<60%.

2. The conductive sheet according to claim 1 , wherein a total width Wa of widths of the first conductive pattern lines and a total width Wb of: a total width of widths of the sub-nonconduction patterns; and a width of the first nonconductive pattern satisfy relations of following expressions (1) and (2):
1.0 mm< Wa< 5.0 mm  (1)

1.5 mm< Wb< 5.0 mm  (2).

3. The conductive sheet according to claim 1 , wherein a width of the first conductive pattern line and a width of the sub-nonconduction pattern are equal to each other.

4. The conductive sheet according to claim 1 , wherein a width of the first conductive pattern line is smaller than a width of the sub-nonconduction pattern.

5. The conductive sheet according to claim 1 , wherein a width of the first conductive pattern line is larger than a width of the sub-nonconduction pattern.

6. The conductive sheet according to claim 3 wherein the first electrode pattern includes a joining part that electrically connects the plurality of first conductive pattern lines to each other.

7. The conductive sheet according to claim 1 , wherein a number of the first conductive pattern lines is equal to or less than ten.

8. A conductive sheet comprising:
a substrate having a first main surface and a second main surface; and
a first electrode pattern placed on the first main surface of the substrate, wherein
the first electrode pattern is made of metal thin wires, and alternately includes: a plurality of first conductive patterns that extend in a first direction; and a plurality of first nonconductive patterns that are electrically separated from the plurality of first conductive patterns,
wherein the first conductive patterns are formed of grids made of the metal thin wires intersecting with each other, each grid including an opening region surrounded by metal thin wires,
each of the first conductive patterns has one end electrically connected to a first electrode terminal,
each of the first conductive patterns includes, at least, inside thereof, a sub-nonconduction pattern that is formed of a dummy pattern made of metal thin wires including break parts and is electrically separated from the first conductive pattern, and
an area A of each first conductive pattern and an area B of each sub-nonconduction pattern satisfy a following expression:
10%≦B/(A+B)≦80%, wherein
each sub-nonconduction pattern has a slit-like shape extending in the first direction, and
each first conductive pattern includes a plurality of first conductive pattern lines divided by each sub-nonconduction pattern.

Assignees

• Fujifilm Corp

Inventors

• Nakamura Hiroshige
• Kuriki Tadashi

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F2203/04112

  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 · CPC title

• H05K1/0296 Primary

  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) · CPC title

• H05K2201/09681

  Mesh conductors, e.g. as a ground plane · CPC title