# US 9,040,834 B2 · Electroconductive sheet and touch panel

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- Number: US 9,040,834 B2
- Document ID: US9040834B2
- Status: Granted
- Kind: B2
- Application number: 14/271,512
- Filed: 2014-05-07
- Published: 2014-08-28
- Granted: 2015-05-26
- Earliest claimed: 2011-12-16
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Hiroshige Nakamura
- Web page: https://patentgrep.com/patent/US9040834B2

## CPC

- 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)}
- B32B 15/14: next to a fibrous or filamentary layer
- G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F 3/044: by capacitive means
- H05K 1/0274: {Optical details, e.g. printed circuits comprising integral optical means (H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42)}
- H05K 2201/09245: Crossing layout
- 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: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

The present invention provides an electroconductive sheet and a touch panel which do not impair visibility in a vicinity of an electrode terminal in a sensing region. In an electroconductive sheet which has an electrode pattern constructed of a metal thin wire and an electrode terminal that is electrically connected to an end of the electrode pattern, a transmittance of the electrode pattern is 83% or more, and when the transmittance of the electrode pattern is represented by a %, a transmittance of the electrode terminal is controlled to be (a-20)% or more and (a-3)% or less.

## Claims

### Claim 1

An electroconductive sheet comprising:
an electrode pattern constructed of a metal thin wire; and
an electrode terminal that is electrically connected to an end of the electrode pattern, wherein
a transmittance of the electrode pattern is 83% or more, and when the transmittance of the electrode pattern is represented by a %, a transmittance of the electrode terminal is (a-20)% or more and (a-3)% or less.

### Claim 2

An electroconductive sheet comprising:
an electrode pattern constructed of a metal thin wire; and
an electrode terminal that is electrically connected to an end of the electrode pattern, wherein
an aperture ratio of the electrode pattern is 90% or more, and when the aperture ratio of the electrode pattern is represented by b %, an aperture ratio of the electrode terminal is (b-20)% or more and (b-0.1)% or less.

### Claim 3 (depends on 1)

The electroconductive sheet according to claim 1, wherein the electrode terminal includes a mesh shape formed of lattices constructed of a metal thin wire.

### Claim 4 (depends on 3)

The electroconductive sheet according to claim 3, wherein the metal thin wire has a line width of 30 μm or less.

### Claim 5 (depends on 3)

The electroconductive sheet according to claim 3, wherein the metal thin wire is made from an opaque material.

### Claim 6

An electroconductive sheet comprising:
an electrode pattern constructed of a metal thin wire; and
an electrode terminal that is electrically connected to an end of the electrode pattern, wherein
the electrode terminal includes a frame shape constructed of a metal thin wire.

### Claim 7 (depends on 6)

The electroconductive sheet according to claim 6, wherein
when a line width of the thin wire of the electrode pattern is represented by a (μm), a line width b (μm) of the frame shape of the electrode terminal satisfies b≧2a or b≧a+5 (μm).

### Claim 8 (depends on 7)

The electroconductive sheet according to claim 7, wherein the line width a (μm) of the thin wire of the electrode pattern is 30 μm or less.

### Claim 9 (depends on 7)

The electroconductive sheet according to claim 7, further comprising
a mesh shape provided in the frame shape of the electrode terminal constructed of the metal thin wire, the mesh shape which is formed of lattices constructed of a metal thin wire.