CAPACITIVE TOUCH PANEL AND A METHOD OF MANUFACTURING THE SAME

• US 20130027118A1
• Filed: 02/17/2012
• Published: 01/31/2013
• Est. Priority Date: 07/28/2011
• Status: Abandoned Application

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: HO, KWAN-SIN, Xie, Yanjun, Zou, Xiaodan
• Application Number:
  US13/398,845
• Publication Number:
  US 20130027118A1
• Time in Patent Office: Days
• US Class Current: 327/517
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

The present disclosure relates to structure of a capacitive touch panel and further relates to its manufacturing method. The structure comprises of sensing electrodes and peripheral circuits, wherein each sensing electrode comprises of a plurality of conductive units and a plurality of conductive wires for connecting the conductive units, wherein the conductive wires and peripheral circuits are made of a photosensitive material having an electrically conductive property.

Claims

1. A capacitive touch panel, comprising:

sensing electrodes comprising a plurality of conductive units and a plurality of conductive wires for connecting the conductive units, wherein the conductive wires are made of a photosensitive material having an electrically conductive property.

2. The capacitive touch panel according to claim 1, wherein the photosensitive material having the electrically conductive property is a photosensitive material doped with metal particles.

3. The capacitive touch panel according to claim 2, wherein the metal particles comprises of one or more of gold, silver, copper, iron or aluminum, and any combinations thereof.

4. The capacitive touch panel according to claim 1, wherein the photosensitive material having the electrically conductive property is a photosensitive material doped with carbon particles.

5. The capacitive touch panel according to claim 1, wherein the sensing electrodes include first sensing electrodes arranged in a first axial direction and second sensing electrodes arranged in a second axial direction, further wherein an insulating layer is disposed between the first sensing electrodes and the second sensing electrodes.

6. The capacitive touch panel according to claim 5, wherein each of the first sensing electrodes comprises a plurality of first conductive units and a plurality of first conductive wires connecting the first conductive units, and each of the second sensing electrodes comprises a plurality of second conductive units and a plurality of second conductive wires connecting the second conductive units.

7. The capacitive touch panel according to claim 6, wherein the insulating layer is an insulating film having a plurality of openings, wherein the first conductive units, the second conductive units, and the first conductive wires are provided on backside of the insulating film with the plurality of openings aligned with the second conductive units, further wherein the second conductive wires are provided on front side of the insulating film and pass through the plurality of openings to connect the second conductive units.

8. The capacitive touch panel according to claim 6, wherein the insulating layer comprises a plurality of insulating blocks, further wherein the insulating blocks are disposed between the plurality of first conductive wires and the plurality of second conductive wires.

9. The capacitive touch panel according to claim 1, wherein the sensing electrodes are connected to peripheral circuits.

10. The capacitive touch panel according to claim 9, wherein the peripheral circuits and the conductive wires are made of the photosensitive material having an electrically conductive property.

11. A method of manufacturing a capacitive touch panel, comprising the following steps:

disposing a plurality of conductive units on a substrate; and

disposing a plurality of conductive wires, which connect the conductive units to form sensing electrodes, wherein the conductive wires are made of a photosensitive material having an electrically conductive property.

12. The method of manufacturing a capacitive touch panel according to claim 11, wherein the photosensitive material having an electrically conductive property is a photosensitive material doped with metal particles.

13. The method of manufacturing a capacitive touch panel according to claim 11, wherein the metal particles comprise of one or more of gold, silver, copper, iron or aluminum, and any combinations thereof.

14. The method of manufacturing a capacitive touch panel according to claim 11, wherein the photosensitive material having an electrically conductive property is a photosensitive material doped with carbon particles.

15. The method of manufacturing a capacitive touch panel according to claim 11, wherein the sensing electrodes comprise of first sensing electrodes arranged in a first axial direction and second sensing electrodes arranged in a second axial direction, wherein the method further comprises a step of disposing an insulating layer between the first sensing electrodes and the second sensing electrodes.

16. The method of manufacturing a capacitive touch panel according to claim 15, wherein each of the first sensing electrodes comprises a plurality of first conductive units, each of the second sensing electrodes comprises a plurality of second conductive units, further wherein the conductive wires include a plurality of first conductive wires connecting the first conductive units and a plurality of second conductive wires connecting the second conductive units.

17. The method of manufacturing a capacitive touch panel according to claim 16, further comprising the following steps:

simultaneously disposing the first conductive units, the second conductive units, and the first conductive wires on the substrate;

disposing an insulating film having a plurality of openings on surfaces of the first conductive units, the second conductive units, and the first conductive wires such that the openings are aligned with the second conductive units; and

disposing the second conductive wires on surface of the insulating film.

18. The method of manufacturing a capacitive touch panel according to claim 16, further comprising the following the steps:

simultaneously disposing the first conductive units, the second conductive units, and the first conductive wires on the substrate;

disposing insulating blocks on surfaces of the first conductive wires; and

disposing the second conductive wires on surfaces of the insulating blocks.

19. The method of manufacturing a capacitive touch panel according to claim 11, further comprising the step of disposing peripheral circuits connected with the sensing electrodes.

20. The method of manufacturing a capacitive touch panel according to claim 19, wherein the step of disposing the peripheral circuits and the step or disposing a plurality of conductive wires are conducted simultaneously.