Touch panel and method for manufacturing the same

• US 9,433,089 B2
• Filed: 06/29/2012
• Issued: 08/30/2016
• Est. Priority Date: 06/29/2011
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Byung Soo, Lee, Keun Sik
• Primary Examiner(s): Chow, Van
• Application Number:
  US14/130,259
• Publication Number:
  US 20140333850A1
• Time in Patent Office: 1,523 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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: H05K 1/028 Bending or folding regions of flexible printed circuits H05K1/0283 takes precedence
• CPC Class Codes: H05K 1/0298 Multilayer circuits
• CPC Class Codes: H05K 2201/0145 Polyester, e.g. polyethylene terephthalate [PET], polyethylene naphthalate [PEN]
• CPC Class Codes: H05K 2201/05 Flexible printed circuits [FPCs]
• CPC Class Codes: H05K 2201/10128 Display

Abstract

Disclosed are a touch panel and a method for manufacturing the same. A touch panel can include a substrate, a transparent electrode base on the substrate, a first transparent electrode on the transparent electrode base and extending in a first direction, and a second transparent electrode on the transparent electrode base and extending in a second direction. A method of manufacturing a touch panel can include preparing a substrate and a transparent electrode base, forming a transparent electrode over the transparent electrode base, and forming an electrode material over the transparent electrode base.

Claims

1. A touch panel comprising:

a substrate;

a transparent electrode base disposed on the substrate;

a first transparent electrode disposed on the transparent electrode base and extending in a first direction;

a second transparent electrode disposed on the transparent electrode base and extending in a second direction;

an adhesive interposed between the substrate and the first transparent electrode;

an insulating layer interposed between the first transparent electrode and the second transparent electrode; and

a wire electrode connected to the first transparent electrode,

wherein the wire electrode is provided on the transparent electrode base,

wherein at least one surface of the substrate comprises a curved surface,

wherein the second transparent electrode is in direct physical contact with the transparent electrode base,

wherein the substrate comprises a glass substrate, and

wherein the transparent electrode base comprises a poly(ethylene terephthalate)(PET) film.

2. The touch panel of claim 1, wherein the transparent electrode base comprises a hard coating layer, and the hard coating layer and the insulating layer are subject to index matching.

3. The touch panel of claim 1, further comprising an anti-reflective layer provided on the transparent electrode base.

4. The touch panel of claim 1, wherein the adhesive comprises an optically clear adhesive (OCA).

5. The touch panel of claim 1, wherein the wire electrode has a line width in a range of about 10 μ

m to about 100 μ

m.

6. The touch panel of claim 1, wherein the first and second transparent electrodes are provided on a same surface of the transparent electrode base.

7. The touch panel of claim 1, wherein two surfaces of the substrate comprise a curved surface.

8. The touch panel of claim 1, wherein the two surfaces of the substrate are opposite to each other.

9. The touch panel of claim 1, wherein the transparent electrode base is disposed on at least one of the two surfaces of the substrate.

10. The touch panel of claim 1, wherein the substrate comprises a first curved surface and a second curved surface opposite to the first surface.

11. A display device comprising the touch panel according to claim 1.

12. The touch panel of claim 1, wherein a portion of the wire electrode is not overlapped with the insulating layer in a vertical direction perpendicular to an upper surface of the transparent electrode base.