# US 6,720,955 B2 · Transparent conductive laminated body and touch panel

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- Number: US 6,720,955 B2
- Document ID: US6720955B2
- Status: Granted
- Kind: B2
- Application number: 10/062,916
- Filed: 2002-01-31
- Published: 2002-10-31
- Granted: 2004-04-13
- Earliest claimed: 2001-02-13
- Assignees: Nitto Denko Corporation
- Inventors: Hideo Sugawara; Tomonori Noguchi; Hidehiko Andou
- Web page: https://patentgrep.com/patent/US6720955B2

## CPC

- G02B 6/10: of the optical waveguide type (G02B6/02, G02B6/24 take precedence; devices or arrangements for the control of light by electric, magnetic, electro-magnetic or acoustic means G02F1/00; transferring the modulation of modulated light G02F2/00; optical logic elements G02F3/00; optical analogue/digital converters G02F7/00)
- G09G 2300/04: Structural and physical details of display devices
- G09G 2330/04: Display protection
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A transparent conductive laminated body comprising a transparent dielectric substance thin film having two layers and furthermore a transparent conductive thin film being formed on one face of a transparent film substrate with thickness of 2 to 120 μm, and a transparent substrate being adhered on another face of the film substrate through a transparent pressure sensitive adhesive layer, wherein a relationship of n3<n1<=n2 <n4 is satisfied where a light index of refraction of the film substrate is defined as n1, a light indexes of refraction of the two layers of the dielectric substance thin films are defined as n2 and n3 from the film substrate side respectively, and a light index of refraction of the conductive thin film is defined as n4 is excellent in transparency and scratch-proof property of the conductive thin film, and, moreover, excellent also in flexibility. A touch panel using the transparent conductive laminated body concerned has an improved dotting property.

## Claims

### Claim 1

A transparent conductive laminated body comprising a transparent dielectric substance thin film having two layers and furthermore a transparent conductive thin film being formed on one face of a transparent film substrate with thickness of 2 to 120 μm,
and a transparent substrate being adhered on another face of the film substrate through a transparent pressure sensitive adhesive layer,
wherein a relationship of n3<n1<=n2<n4 is satisfied where a light index of refraction of the film substrate is defined as n1, a light indexes of refraction of the two layers of the dielectric substance thin films are defined as n2 and n3 from the film substrate side respectively, and a light index of refraction of the conductive thin film is defined as n4.

### Claim 2 (depends on 1)

The transparent conductive laminated body according to claim 1, wherein the dielectric substance thin film with an index of refraction n2 is an organic substance or a mixture of an organic substance and an inorganic substance.

### Claim 3 (depends on 2)

A touch panel in which a pair of panel boards with a conductive thin film are configured so that the conductive thin films face each other through a spacer, wherein at least one panel board comprises the transparent conductive laminated body according to claim 2.

### Claim 4 (depends on 2)

The transparent conductive laminated body according to claim 2, wherein the dielectric substance thin film with an index of refraction n2 is an organic substance.

### Claim 5 (depends on 4)

A touch panel in which a pair of panel boards with a conductive thin film are configured so that the conductive thin films face each other through a spacer, wherein at least one panel board comprises the transparent conductive laminated body according to claim 4.

### Claim 6 (depends on 2)

The transparent conductive laminated body according to claim 2, wherein the dielectric substance thin film with an index of refraction n2 is a mixture of an organic substance and an inorganic substance.

### Claim 7 (depends on 6)

A touch panel in which a pair of panel boards with a conductive thin film are configured so that the conductive thin films face each other through a spacer, wherein at least one panel board comprises the transparent conductive laminated body according to claim 6.

### Claim 8 (depends on 1)

The transparent conductive laminated body according to claim 1, wherein the dielectric substance thin film with an index of refraction n3 is an inorganic substance or a mixture of an inorganic substance and an organic substance.

### Claim 9 (depends on 8)

A touch panel in which a pair of panel boards with a conductive thin film are configured so that the conductive thin films face each other through a spacer, wherein at least one panel board comprises the transparent conductive laminated body according to claim 8.

### Claim 10 (depends on 1)

A touch panel in which a pair of panel boards with a conductive thin film are configured so that the conductive thin films face to each other through a spacer, wherein at least one panel board comprises the transparent conductive laminated body according to claim 1.

### Claim 11 (depends on 10)

A touch panel in which a pair of panel boards with a conductive thin film are configured so that the conductive thin films face each other through a spacer, wherein at least one panel board comprises the transparent conductive laminated body according to claim 10.