Touch panel and method for manufacturing the same

• US 10,310,666 B2
• Filed: 08/09/2018
• Issued: 06/04/2019
• 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 N
• Application Number:
  US16/059,754
• Publication Number:
  US 20180348952A1
• Time in Patent Office: 299 Days
• 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 transparent electrode base;

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

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

an insulating layer disposed on the transparent electrode base;

a first wire electrode connected to the first electrode, and provided on the transparent electrode base;

a second wire electrode connected to the second electrode, and provided on the transparent electrode base;

a substrate disposed on the transparent electrode base;

an outer dummy layer disposed on the first wire electrode and the second wire electrode; and

an optically clear adhesive (OCA) interposed between the substrate and the transparent electrode base,

wherein the substrate comprises at least one curved surface,

wherein the substrate comprises glass,

wherein each of the first wire electrode and the second wire electrode has a line width in a range of from 10 μ

m to 100 μ

m,

wherein the substrate includes an effective area and a dummy area,

wherein the outer dummy layer is disposed on the dummy area, and

wherein a width of the dummy area is less than 2 mm.

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

3. The touch panel of claim 1, wherein the second transparent electrode is in direct physical contact with the transparent electrode base.

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

5. The touch panel of claim 1, wherein a portion of at least one of the first and second wire electrodes is not overlapped with the insulating layer in a vertical direction perpendicular to an upper surface of the transparent electrode base.

6. The touch panel of claim 1, wherein the substrate comprises at least two curved surfaces.

7. The touch panel of claim 1, wherein the first transparent electrode is in direct physical contact with the transparent electrode base.

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

9. The touch panel of claim 1, wherein each of the first transparent electrode and the second transparent electrode comprises at least one of the following materials:

indium tin oxide;

indium zinc oxide;

copper oxide;

tin oxide;

zinc oxide;

titanium oxide;

carbon nano tube (CNT); and

conductive polymer material.

10. The touch panel of claim 1, wherein each of the first wire electrode and the second wire electrode comprises at least one of the following materials:

chromium (Cr);

aluminum (Al);

silver (Ag);

copper (Cu);

nickel (Ni); and

molybdenum (Mo).

11. The touch panel of claim 1, wherein the first transparent electrode includes a pair of first sensor parts and a first connection part connecting the first sensor parts to each other,

wherein the second transparent electrode includes a pair of second sensor parts and a second connection part connecting the second sensor parts to each other,

wherein the first connection part connects the first sensor parts in the first direction, and the second connection part connects the second sensor parts in the second direction, and

wherein the insulating layer is disposed between the first connection part and the second connection part.

12. The touch panel of claim 1, wherein the insulating layer includes at least one of silicon oxide, polymer, and acrylic resin.

13. The touch panel of claim 1, further comprising a printed circuit board connected to the first and second wire electrodes,

wherein the first wire electrode, the second wire electrode, and the printed circuit board are disposed on the dummy area.

14. The touch panel of claim 1, further comprising a scattering prevention film on the first wire electrode, the second wire electrode, the first transparent electrode, and the second transparent electrode;

wherein the scattering prevention film covers the first wire electrode, the second wire electrode, the first transparent electrode, and the second transparent electrode.

15. The touch panel of claim 1, wherein the insulating layer includes an organic material.

16. The touch panel of claim 1, wherein the insulating layer includes at least one of a silicon nitride (SiNx) and a silicon oxide (SiO₂).

17. The touch panel of claim 1, wherein the first direction and second direction are cross each other.

18. The touch panel of claim 1, wherein the substrate includes a surface that is touched by an input device.

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

20. The touch panel of claim 1, wherein the dummy area comprises four areas including a top side area, a bottom side area, a left side area, and a right side area, and wherein a width of each of at least two of the four areas of the dummy area is less than 2 mm.