Touch panel

• US 7,056,603 B2
• Filed: 03/01/2004
• Issued: 06/06/2006
• Est. Priority Date: 12/26/2000
• Status: Expired due to Fees

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Kusano, Yukihiro, Iwabuchi, Yoshinori, Yoshikawa, Masato, Nishida, Mitsuhiro
• Primary Examiner(s): Stein, Stephen
• Application Number:
  US10/788,308
• Publication Number:
  US 20040165005A1
• Time in Patent Office: 827 Days
• Field of Search: 428/697, 428/446, 428/448, 428/701, 428/702, 428/698, 428/458, 428/323, 345/173, 345/176, 204/192.1, 427/255.18
• US Class Current: 428/698
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
• CPC Class Codes: C09K 2323/03 Viewing layer characterised by chemical composition
• CPC Class Codes: C09K 2323/033 Silicon compound, e.g. glass or organosilicon
• CPC Class Codes: C09K 2323/053 Organic silicon compound, e.g. organosilicon
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H01B 1/08 oxides
• CPC Class Codes: H01B 1/22 the conductive material comprising metals or alloys
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31667 Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product

Abstract

A touch panel includes a transparent electro-conductive film. The transparent electro-conductive film comprises a primary layer formed on a polymer film, and a transparent electro-conductive thin film or a multi-lamination film composed of at least one metal-compound layer and at least one electro-conductive-metal layer is formed on the primary layer. The primary layer is made of silicon compound. The primary layer is formed by sputtering, using a target having a density of 2.9 g/cm³ or more.

Claims

1. A touch panel comprising a transparent electro-conductive film comprising a polymer film, a primary layer formed on the polymer film, and a transparent electro-conductive thin film formed on the primary layer;

wherein the primary layer comprises an ultraviolet-curing resin containing particles of at least one silicon compound selected from the group consisting of SiC_x, SiN_x, SiC_xO_y, SiC_xN_y, SiO_xN_y, and SiC_xO_yN₂.

2. A touch panel according to claim 1, wherein said primary layer has a thickness of 1 nm to 50 μ

m.

3. A touch panel according to claim 1, wherein said particles of the silicon compound are provided with acryl groups, epoxy groups or carboxyl groups on surfaces thereof.

4. A touch panel according to claim 3, wherein said particles of the silicon compound are particles of acryl-modified silica produced by condensing colloidal silica and acryl group-modified silane compound.

5. A touch panel according to claim 1, wherein said particles of the silicon compound have an average diameter of 1 nm to 5 μ

m, and are included in the primary layer at a weight percentage of 1 to 90% to the ultraviolet-curing resin.

6. A touch panel according to claim 1, wherein said primary layer has a thickness of 1 nm to 10 μ

m.

7. A touch panel according to claim 1, wherein said electro-conductive thin film consists of metal oxide.

8. A touch panel according to claim 7, wherein said metal oxide is at least one selected from the group consisting of indium tin oxide, antimony tin oxide, ZnO, ZnO doped with Al, and SnO₂.

9. A touch panel according to claim 7, wherein said electro-conductive thin film has a thickness of 1 to 500 nm.

10. A touch panel according to claim 9, wherein said electro-conductive thin film has a thickness of from 5 to 100 nm.

11. A touch panel according to claim 5, wherein said silicon compound particles are incorporated into the ultraviolet-curing resin in an amount of from 10 to 50% by weight.