Transparent laminate, capacitance type input device, and image display device

• US 9,632,640 B2
• Filed: 01/07/2015
• Issued: 04/25/2017
• Est. Priority Date: 07/03/2012
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Kanna, Shinichi, Saneto, Ryuji
• Primary Examiner(s): Hess, Bruce H
• Assistant Examiner(s): Polley, Christopher
• Application Number:
  US14/591,726
• Publication Number:
  US 20150116270A1
• Time in Patent Office: 839 Days
• Field of Search: None
• CPC Class Codes: B32B 2260/025 Particulate layer layers of natural mineral fibres or particles being impregnated in a plastic substance B32B19/02
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 3/10 characterised by a discontinuous layer, i.e. formed of separate pieces of material
• CPC Class Codes: 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
• CPC Class Codes: 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
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: Y10T 428/24868 Translucent outer layer

Abstract

Provided is a transparent laminate which does not have a problem in which a transparent electrode pattern is visually recognized, a capacitance type input device having the transparent laminate, and an image display device provided with the capacitance type input device as a constituent element. The transparent laminate of the invention includes a region where a transparent substrate, a first transparent film which contains a metal oxide and has a film thickness of 55 nm to 110 nm, a transparent electrode pattern, and a second transparent film which contains 5 mass % to 80 mass % of metal oxide particles and has a film thickness of 55 nm to 110 nm are laminated in this order in a plane.

Claims

1. A transparent laminate

comprising a region where a transparent substrate;

a first transparent film which contains a metal oxide and has a film thickness of 55 nm to 110 nm;

a transparent electrode pattern; and

a second transparent film which contains 5 mass % to 80 mass % of metal oxide particles and has a film thickness of 55 nm to 110 nm are laminated in this order;

wherein the region is included in a plane.

3. The transparent laminate according to claim 1,

wherein the first transparent film contains 5 mass % to 80 mass % of metal oxide particles as the metal oxide.

4. The transparent laminate according to claim 1,

wherein the metal oxide particles contain at least one of a titanium oxide, a titanium composite oxide, a zinc oxide, a zirconium oxide, an indium tin oxide, and an antimony tin oxide.

5. The transparent laminate according to claim 1,

wherein the metal oxide particles has a refractive index of 1.9 or higher.

6. The transparent laminate according to claim 1,

wherein the metal oxide particles are zirconium oxide particles, and

wherein the second transparent film contains the metal oxide particles in an amount of 40.0 mass % to 80 mass %.

7. The transparent laminate according to claim 1,

wherein the metal oxide particles are zirconium oxide particles, and

wherein the second transparent film contains the metal oxide particles in an amount of 40.0 mass % to 70 mass %.

8. The transparent laminate according to claim 1,

wherein the metal oxide particles are titanium oxide particles, and

wherein the second transparent film contains the metal oxide particles in an amount of 30 mass % to 70 mass %.

9. The transparent laminate according to claim 1,

wherein the second transparent film is a resin film.

10. The transparent laminate according to claim 9,

wherein the second transparent film which is the resin film contains an acrylic resin.

11. The transparent laminate according to claim 1,

wherein both of the transparent electrode pattern and a non-pattern region where the transparent electrode pattern is not formed are continuously covered with the first transparent film and the second transparent film directly or via another layer.

12. The transparent laminate according to claim 1,

wherein the first transparent film and the transparent electrode pattern are adjacent to each other.

13. The transparent laminate according to claim 1,

wherein the transparent electrode pattern and the second transparent film are adjacent to each other.

14. The transparent laminate according to claim 1,

wherein at least a part of the non-pattern region where the transparent electrode pattern is not formed includes a region where the transparent substrate, the first transparent film, and the second transparent film are laminated in this order in a plane.

15. The transparent laminate according to claim 14,

wherein the first transparent film and the second transparent film are adjacent to each other in the region where the transparent substrate, the first transparent film, and the second transparent film are laminated in this order.

16. The transparent laminate according to claim 1,

wherein the first transparent film and the second transparent film are made of the same material.

17. The transparent laminate according to claim 1,

wherein the transparent substrate is a glass substrate or a film substrate having a refractive index of 1.5 to 1.55.

18. The transparent laminate according to claim 1,

wherein at least one of the first transparent film and the second transparent film is a transparent resin film.

19. The transparent laminate according to claim 1,

wherein at least one of the first transparent film and the second transparent film is formed by transferring a transparent curable resin film formed on a temporary support onto the transparent substrate.

20. The transparent laminate according to claim 1,

wherein the first transparent film is formed by sputtering.

21. The transparent laminate according to claim 1,

wherein the first transparent film is a mixed film of SiO₂ and Nb₂O₅ formed by sputtering.

22. A capacitance type input device comprising:

the transparent laminate according to claim 1.

23. An image display device comprising:

the capacitance type input device according to claim 22 as a constituent element.

2. A transparent laminate

comprising a region where a transparent substrate;

a first transparent film which has a refractive index of 1.6 to 1.78 and a film thickness of 55 nm to 110 nm;

a transparent electrode pattern; and

a second transparent film which contains 5 mass % to 80 mass % of metal oxide particles and has a film thickness of 55 nm to 110 nm are laminated in this order,

wherein the region is included in a plane.

24. A transparent laminate comprising a region where a transparent substrate;

a first transparent film which contains a metal oxide and has a film thickness of 55 nm to 110 nm;

a transparent electrode pattern; and

a second transparent film which contains 5 mass % to 80 mass % of metal oxide particles and has a film thickness of 55 nm to 110 nm are laminated in this order,

wherein the region is included in a plane, and

wherein the first transparent film and the transparent electrode pattern are directly adjacent to each other.

25. A transparent laminate comprising a region where a transparent substrate;

a first transparent film which contains a metal oxide and has a film thickness of 55 nm to 110 nm;

a transparent electrode pattern; and

a second transparent film which contains 5 mass % to 80 mass % of metal oxide particles and has a film thickness of 55 nm to 110 nm are laminated in this order,

wherein the region is included in a plane, and

wherein the transparent electrode pattern and the second transparent film are directly adjacent to each other.

26. A transparent laminate comprising a region where a transparent substrate;

a first transparent film which contains a metal oxide and has a film thickness of 55 nm to 110 nm;

a transparent electrode pattern; and

a second transparent film which contains 5 mass % to 80 mass % of metal oxide particles and has a film thickness of 55 nm to 110 nm are laminated in this order,

wherein the region is included in a plane,

wherein a transparent protective film is formed on a surface of the second transparent film opposite a surface on which the transparent electrode pattern is formed,

wherein the transparent protective film is obtained by curing a photosensitive layer,

wherein a thickness of the transparent protective film is 0.1 μ

m to 10 μ

m, and

wherein the second transparent film and the transparent protective film are directly adjacent to each other.