TOUCH PANEL AND MANUFACTURING METHOD THEREOF

• US 20150193066A1
• Filed: 12/22/2014
• Published: 07/09/2015
• Est. Priority Date: 01/06/2014
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Zhang, Zhuanyuan, Lin, Yan, Huang, Li, Su, Yuncong
• Granted Patent: US 10,545,590 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 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 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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 29/49155 Manufacturing circuit on or in base

Abstract

A touch panel includes a substrate, at least a connecting pad and at least a strengthening sheet. The substrate has a display area and a periphery area around the display area. The connecting pad is disposed in the periphery area. The strengthening sheet is disposed in the periphery area and at an edge of the connecting pad.

Claims

1. A touch panel, comprising:

a substrate having;

a display area; and

a periphery area around the display area;

at least a connecting pad disposed in the periphery area; and

at least a strengthening sheet disposed in the periphery area and at an edge of the connecting pad.

2. The touch panel as recited in claim 1, wherein the strengthening sheet and the connecting pad have the same material, and the material includes molybdenum, aluminum, copper, silver, nickel, gold or an alloy thereof.

3. The touch panel as recited in claim 1, further comprising:

a light blocking layer disposed in the periphery area and between the substrate and the connecting pad.

4. The touch panel as recited in claim 1, further comprising:

at least a first transparent connecting pattern disposed in the periphery area and between the substrate and the connecting pad, wherein the connecting pad and the adjacent strengthening sheet at least cover the first transparent connecting pattern.

5. The touch panel as recited in claim 4, wherein the material of the first transparent connecting pattern includes indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), nano-silver, carbon nanotube, poly(3,4-ethylenedioxythiophene) poly (styrene sulfonate) (PEDOT:

PSS), zinc oxide dopant or their any combination.

6. The touch panel as recited in claim 1, further comprising:

at least a second transparent connecting pattern disposed in the periphery area and at least disposed in the gap between the connecting pad and the adjacent strengthening sheet.

7. The touch panel as recited in claim 6, wherein the material of the second transparent connecting pattern includes indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), nano-silver, carbon nanotube, poly(3,4-ethylenedioxythiophene) poly (styrene sulfonate) (PEDOT:

PSS), zinc oxide dopant or any combination thereof

8. The touch panel as recited in claim 1, wherein the strengthening sheet does not directly contact the connecting pad.

9. A manufacturing method of a touch panel, comprising steps of:

providing a substrate having a display area and a periphery area around the display area; and

forming at least a connecting pad in the periphery area; and

forming a strengthening sheet at an edge of the connecting pad while forming the at least the connecting pad.

10. The manufacturing method as recited in claim 9, wherein the strengthening sheet and the connecting pad have the same material.

11. The manufacturing method as recited in claim 9, further comprising a step of:

forming a light blocking layer in the periphery area and between the connecting pad and the substrate.

12. The manufacturing method as recited in claim 9, further comprising a step of:

forming a plurality of first transparent connecting patterns in the periphery area, wherein the connecting pad and the adjacent strengthening sheet cover the first transparent connecting pattern.

13. The manufacturing method as recited in claim 12, further comprising a step of:

forming a plurality of second transparent connecting patterns in the periphery area wherein the second transparent connecting pattern is at least disposed in the gap between the connecting pad and the adjacent strengthening sheet.

14. The manufacturing method as recited in claim 13, further comprising a step of:

forming a plurality of first electrode axes and a plurality of second electrode axes in the display area.

15. The manufacturing method as recited in claim 14, wherein the first electrode axes, the second electrode axes and the first transparent connecting pattern are formed in the same step.

16. The manufacturing method as recited in claim 15, further comprising a step of:

forming a plurality of insulating layers in the display area and at the intersections of the first and second electrode axes.

17. The manufacturing method as recited in claim 16, further comprising a step of:

forming a plurality of bridge structures in the display area and on the insulating layers.

18. The manufacturing method as recited in claim 17, wherein the bridge structure and the second transparent connecting pattern are formed in the same step.