Method of forming touch sensing circuit pattern

• US 8,283,935 B2
• Filed: 07/08/2008
• Issued: 10/09/2012
• Est. Priority Date: 05/12/2008
• 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: Liu, Chen-Yu, Wang, Ching-Yi
• Primary Examiner(s): Deo, Duy
• Application Number:
  US12/168,896
• Publication Number:
  US 20090277695A1
• Time in Patent Office: 1,554 Days
• Field of Search: None
• US Class Current: 324/662
• 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 3/0443 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

Abstract

A method of forming a touch sensing circuit pattern includes steps of: forming a first axial conductive line on a transparent substrate; forming an insulation barrier on the first axial conductive line; forming two separated first axial electrodes, two separated second axial electrodes and the second axial conductive line on the transparent substrate. The first axial electrodes are arranged on two sides of the insulation barrier along a first direction. The second axial electrodes are arranged on two opposite sides of the axial conductive line along a second direction. The second axial conductive line is across on the insulation barrier and connects to the second axial electrodes. The method of the invention can simplify the manufacturing process.

Claims

1. A method of forming a touch sensing circuit pattern, comprising:

forming a first axial conductive line on a first surface of a transparent substrate;

forming an insulation barrier on the first axial conductive line;

forming two separated first axial electrodes, two separated second axial electrodes and a second axial conductive line on said first surface of said transparent substrate,

wherein the first axial electrodes are arranged on two sides of the insulation barrier along a first direction so as to be connected by the first axial conductive line;

the second axial electrodes are arranged on two sides of the first axial conductive line along a second direction; and

the second axial conductive line is across the insulation barrier and connects to the second axial electrodes to form a touch sensing circuit pattern.

2. The method of claim 1, wherein the first axial conductive line is made of non-transparent conductive material.

3. The method of claim 1, wherein the first axial conductive line is made of transparent conductive material.

4. The method of claim 1, wherein the first axial electrodes, the second axial conductive line and the second axial electrodes are made of transparent conductive material.

5. A method of forming a touch sensing circuit pattern, comprising:

forming a plurality of parallel first axial conductive lines on a first surface of a transparent substrate;

forming a plurality of separated insulation barriers on the first axial conductive lines;

forming a plurality of separated first axial electrodes, a plurality of separated second axial electrodes and a plurality of parallel second axial conductive lines on said first surface of said transparent substrate,

wherein two adjacent first axial electrodes are arranged on two sides of a corresponding insulation barrier along a first direction so as to be connected by a corresponding first axial conductive line;

two adjacent second axial electrodes are arranged on two sides of the first axial conductive line along a second direction; and

the second axial conductive lines are across the insulation barriers and connect to the second axial electrodes to form a touch sensing circuit pattern.

6. The method of claim 5, wherein the first axial conductive lines are made of non-transparent conductive material.

7. The method of claim 5, wherein the first axial conductive lines are made of transparent conductive material.

8. The method of claim 5, wherein the first axial electrodes, the second axial conductive lines and the second axial electrodes are made of transparent conductive material.

9. A method of forming a touch sensing circuit pattern, comprising:

forming a plurality of parallel first axial conductive lines on a first surface of a transparent substrate;

forming a plurality of separated insulation barriers on the first axial conductive lines;

forming a plurality of separated first axial electrodes, a plurality of separated second axial electrodes and a plurality of parallel second axial conductive lines on said first surface of said transparent substrate,

wherein each two adjacent first axial electrodes are arranged on two sides of a corresponding insulation barrier along a first direction so as to be connected by a corresponding first axial conductive line;

each two adjacent second axial electrodes are arranged on two sides of the first axial conductive line along a second direction;

the second axial conductive lines are across the insulation barriers and connect to the second axial electrodes to form a touch sensing circuit pattern; and

wherein forming the first axial conductive lines further comprises sputtering a conductive material on the substrate and forming the second axial conductive lines further comprises sputtering a conductive material on the substrate, the substrate already bearing the first axial conductive lines and separated insulation barriers.

10. The method of claim 9, further including forming a plurality of second directional metal lines on the first surface of a transparent substrate separate from said plurality of parallel first axial conductive lines when forming said plurality of parallel first axial conductive lines, wherein said plurality of second axial conductive lines connect to said plurality of second directional lines.

11. The method of claim 9, wherein the first axial conductive lines are made of non-transparent conductive material.

12. The method of claim 9, wherein the first axial conductive lines are made of transparent conductive material.

13. The method of claim 9, wherein the first axial electrodes, the second axial conductive lines and the second axial electrodes are made of a transparent conductive material.

14. The method of claim 9, further including exposing, developing and etching said sputtered conductive material to form the first axial conductive lines and the second axial conductive lines.

15. The method of claim 11, wherein the non-transparent conductive material is a metal material.

16. The method of claim 15 wherein the metal material comprises at least one of aurum, silver, copper, and aluminum.

17. The method of claim 12 wherein the transparent conductive material is an ITO (Indium Tin Oxide).

18. The method of claim 13 wherein the transparent conductive material is an ITO (Indium Tin Oxide).

19. A method of forming a touch sensing circuit pattern, comprising:

forming a plurality of parallel first axial conductive lines and a plurality of second directional metal lines on a first surface of a transparent substrate;

coating an insulation material on the first axial conductive lines to form a plurality of separated insulation barriers;

forming a plurality of separated first axial electrodes, a plurality of separated second axial electrodes and a plurality of parallel second axial conductive lines on said first surface of said transparent substrate,

wherein each two adjacent first axial electrodes are arranged on two sides of a corresponding insulation barrier along a first direction so as to be connected by a corresponding first axial conductive line;

each two adjacent second axial electrodes are arranged on two sides of the first axial conductive line along a second direction;

the second axial conductive lines are formed across the insulation barriers and connect to the second axial electrodes and the second directional metal lines to form a touch sensing circuit pattern.

20. The method of claim 19, wherein the first axial conductive lines and the second directional metal lines are made of non-transparent conductive material.

21. The method of claim 19, wherein the first axial conductive lines, the first axial electrodes, the second axial conductive lines and the second axial electrodes are made of transparent conductive material.

22. The method of claim 19, wherein coating an insulation material to form a plurality of separated insulation barriers further comprises sputtering said insulation material to form said coating.

23. The method of claim 22, further including exposing, developing and etching to form the insulation barriers after the sputtering.

24. The method of claim 19, wherein the insulation material is as silicon dioxide.

25. A method of forming a touch sensing circuit pattern, comprising:

forming a plurality of parallel first axial conductive lines and a plurality of second directional metal lines on a first surface of a transparent substrate;

forming a plurality of separated insulation barriers on the first axial conductive lines;

sputtering a conductive material on said first surface of said transparent substrate to form a plurality of separated first axial electrodes, a plurality of separated second axial electrodes and a plurality of parallel second axial conductive lines;

wherein two adjacent first axial electrodes are arranged on two sides of a corresponding insulation barrier along a first direction so as to be connected by a corresponding first axial conductive line;

two adjacent second axial electrodes are arranged on two sides of the first axial conductive line along a second direction;

the second axial conductive lines are across the insulation barriers and connect to the second axial electrodes to form a touch sensing circuit pattern.

26. The method of claim 25, wherein the first axial electrodes, the second axial conductive lines and the second axial electrodes are made of transparent conductive material.

27. The method of claim 25, further including exposing, developing and etching to form the first axial electrodes, the second axial electrodes and the second axial conductive lines after the sputtering.

28. The method of claim 26 wherein the transparent conductive material is an ITO (Indium Tin Oxide).

29. A method of forming a touch sensing circuit pattern, comprising:

forming a plurality of parallel first axial conductive lines and a plurality of second directional metal lines on a first surface of a transparent substrate;

forming a plurality of separated insulation barriers on the first axial conductive lines;

forming a plurality of separated first axial electrodes, a plurality of separated second axial electrodes and a plurality of parallel second axial conductive lines on said first surface of said transparent substrate,

wherein each two adjacent first axial electrodes are arranged on two sides of a corresponding insulation barrier along a first direction so as to be connected by a corresponding first axial conductive line;

each two adjacent second axial electrodes are arranged on two sides of the first axial conductive line along a second direction;

the second axial conductive lines are across the insulation barriers and connect to the second axial electrodes and the second directional metal lines to form a touch sensing circuit pattern; and

wherein the first axial conductive lines are overlapped by a black matrix for a display.

30. The method of claim 29, wherein the first axial conductive lines and the second directional metal lines are made of non-transparent conductive material.

31. The method of claim 29, wherein the first axial conductive lines, the first axial electrodes, the second axial conductive lines and the second axial electrodes are made of transparent conductive material.

32. The method of claim 30, wherein the non-transparent conductive material is a metal material.

33. The method of claim 32 wherein the metal material comprises at least one of aurum, silver, copper, and aluminum.

34. The method of claim 31 wherein the transparent conductive material is an ITO (Indium Tin Oxide).

35. The method of claim 29, further including coating a conductive material on the transparent substrate to form the first axial conductive lines and the second axial conductive lines.

36. The method of claim 35, wherein coating said conductive material on the transparent substrate further comprises sputtering said conductive material.

37. The method of claim 36, further including exposing, developing and etching to form the first axial conductive lines and the second axial conductive lines after the sputtering.

38. The method of claim 29, further including coating an insulation material on the transparent substrate to form the insulation barriers.

39. The method of claim 38, wherein coating the insulation material on said transparent substrate further comprises sputtering said insulation material.

40. The method of claim 39, further including exposing, developing and etching to form the insulation barriers after the sputtering.

41. The method of claim 38, wherein the insulation material is a silicon dioxide.

42. The method of claim 29, further including coating a conductive material on the transparent substrate to form the first axial electrodes, the second axial electrodes and the second axial conductive lines.

43. The method of claim 42, wherein coating the conductive material on the transparent substrate further comprises sputtering said conductive material.

44. The method of claim 43, further including exposing, developing and etching to form the first axial electrodes, the second axial electrodes and the second axial conductive lines after the sputtering.