Touch screen panel and fabrication method thereof

• US 9,104,274 B2
• Filed: 04/07/2010
• Issued: 08/11/2015
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Do-Youb, Kwak, Won-Kyu, Jang, Brent
• Primary Examiner(s): Lee, Nicholas
• Assistant Examiner(s): Taylor, Jr., Duane N
• Application Number:
  US12/756,103
• Publication Number:
  US 20110050625A1
• Time in Patent Office: 1,952 Days
• Field of Search: None
• 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 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A touch screen panel includes first and second sense cells on a same layer and coupling patterns that couple adjacent ones of the first sense cells and adjacent ones of the second sense cells to each other, respectively. The coupling patterns do not cross with each other, thereby improving the ability of the coupling patterns to withstand static electricity. A dummy line formed of a same material as the sense cells may be formed between the first and second sense cells, and the dummy line is electrically coupled to a guard ring located in an area outside of a display area of the touch screen panel, making it possible to overcome the effects of static electricity applied to the front surface of the touch screen panel as well as the side surface thereof.

Claims

1. A touch screen panel comprising:

a transparent substrate;

a plurality of first coupling patterns on the transparent substrate aligned in a first direction, wherein an entire bottom surface of the plurality of first coupling patterns directly contacts the transparent substrate;

a plurality of second coupling patterns on the transparent substrate aligned in a second direction and being spaced from the first coupling patterns, wherein an entire bottom surface of the plurality of second coupling patterns directly contacts the transparent substrate, wherein the plurality of first coupling patterns and the plurality of second coupling patterns are at a same layer on a same side of the transparent substrate and do not cross each other, and wherein the plurality of first coupling patterns and the plurality of second coupling patterns are implemented with low-resistance material rather than transparent conductive material;

a dielectric layer on the first and second coupling patterns and having first and second contact holes respectively corresponding to end portions of the first and second coupling patterns, wherein at least a portion of the plurality of first coupling patterns and at least a portion of the plurality of second coupling patterns are between the transparent substrate and the dielectric layer;

a plurality of first sense cells arranged in rows extending in the first direction on the dielectric layer; and

a plurality of second sense cells arranged in columns extending in the second direction on the dielectric layer,

wherein adjacent ones of the first sense cells are electrically coupled to each other through the first coupling patterns exposed by the first contact holes, and adjacent ones of the second sense cells are electrically coupled to each other through the second coupling patterns exposed by the second contact holes.

2. The touch screen panel as claimed in claim 1, further comprising:

a plurality of metal patterns on edge portions of a display area on which the first and second sense cells are located on the transparent substrate, the metal patterns electrically coupling the first and second sense cells column-by-column or row-by-row to position detecting lines.

3. The touch screen panel as claimed in claim 2, wherein the first and second coupling patterns and the metal patterns are on a same layer and are constituted of a metal having a resistance value that is lower than that of a material constituting the first and second sense cells.

4. The touch screen panel as claimed in claim 1, wherein the first sense cells and the second sense cells are alternately arranged and not overlapped with each other.

5. The touch screen panel as claimed in claim 1, wherein at least one of the second coupling patterns electrically couples two adjacent ones of the second sense cells to each other.

6. The touch screen panel as claimed in claim 1, wherein the second coupling patterns partially overlap with the first sense cells adjacent to the second sense cells coupled by the second coupling patterns.

7. The touch screen panel as claimed in claim 1, wherein the first and second coupling patterns are in a rectangular shape.

8. The touch screen panel as claimed in claim 1, wherein the first and second sense cells comprise a transparent electrode material with a thickness between 100 Å

and 300 Å

.

9. The touch screen panel as claimed in claim 8, wherein the transparent electrode material is indium tin oxide.

10. The touch screen panel as claimed in claim 1, further comprising:

a dummy line on the dielectric layer between the first and second sense cells;

a guard ring on a peripheral region of a display area on which the first and second sense cells are formed, the guard ring being on the transparent substrate and surrounding the display area; and

a third contact hole on the dielectric layer corresponding to an end portion of the dummy line,

wherein the guard ring and the dummy line are electrically coupled to each other through the third contact hole.

11. The touch screen panel as claimed in claim 10, wherein the dummy line is on a same layer as the first and second sense cells and comprises a same transparent conductive material as the first and second sense cells.

12. The touch screen panel as claimed in claim 10, wherein the dummy line is formed in a mesh type comprising intersecting lines coupled to each other and being on an area between the first and second sense cells.

13. The touch screen panel as claimed in claim 12, wherein the dummy line comprises a plurality of end portions extending to an area outside of the display area on which the first and second sense cells are located, and

the third contact hole includes a plurality of third contact holes, the plurality of end portions being electrically coupled to the guard ring through the plurality of third contact holes.

14. The touch screen panel as claimed in claim 10, wherein the guard ring is on a same layer as the first and second coupling patterns and is formed of a same material as the first and second coupling patterns.

15. The touch screen panel as claimed in claim 1, wherein the transparent substrate is an upper substrate of a display panel constituting a flat panel display.

16. The touch screen panel as claimed in claim 15, wherein the first and second coupling patterns are slantly formed at an angle.

17. A fabrication method of a touch screen panel, the method comprising:

forming a plurality of first coupling patterns aligned in a first direction, an entire bottom surface of the plurality of first coupling patterns directly contacting a transparent substrate, and forming a plurality of second coupling patterns aligned in a second direction, an entire bottom surface of the plurality of second coupling pattern directly contacting the transparent substrate, the second coupling patterns being spaced from the first coupling patterns, wherein the plurality of first coupling patterns and the plurality of second coupling patterns are at a same layer on a same side of the transparent substrate and do not cross each other, and wherein the plurality of first coupling patterns and the plurality of second coupling patterns are implemented with low-resistance material rather than transparent conductive material;

forming a dielectric layer on the first and second coupling patterns, the dielectric layer having first and second contact holes respectively corresponding to end portions of the first and second coupling patterns, wherein at least a portion of the plurality of first coupling patterns and at least a portion of the plurality of second coupling patterns are between the transparent substrate and the dielectric layer;

forming first sense cells arranged in rows extending in the first direction on the dielectric layer; and

forming second sense cells arranged in columns extending in the second direction on the dielectric layer,

wherein the adjacent first sense cells are electric ally coupled to each other through the first coupling patterns exposed by the first contact holes, and the adjacent second sense cells are electrically coupled to each other through the second coupling patterns exposed by the second contact holes.

18. The fabrication method of the touch screen panel as claimed in claim 17, further comprising:

forming a plurality of metal patterns on edge portions of a display area on which the first and second sense cells are formed, the metal patterns being on the transparent substrate and electrically coupling the first and second sense cells column-by-column or row-by-row to position detecting lines.

19. The fabrication method of the touch screen panel as claimed in claim 18, wherein the first and second coupling pattern;

and the metal patterns are on a same layer and are constituted of a metal having a resistance value lower than that of a material constituting the first and second sense cells.

20. The fabrication method of the touch screen panel as claimed in claim 17, wherein the first sense cells and the second sense cells are alternately arranged and not overlapped with each other.

21. The fabrication method of the touch screen panel as claimed in claim 17, further comprising:

forming a dummy line on the dielectric layer between the first and second sense cells;

forming a guard ring on a peripheral region of a display area on which the first and second sense cells are formed, the guard ring being on the transparent substrate and surrounding the display area; and

forming a third contact hole on the dielectric layer corresponding to an end portion of the dummy line,

wherein the guard ring and the dummy line are electrically coupled to each other through the third contact hole.

22. The fabrication method of the touch screen panel as claimed in claim 21, wherein the dummy line is on a same layer as the first and second sense cells and comprises a same transparent conductive material as the first and second sense cells.

23. The fabrication method of the touch screen panel as claimed in claim 21, wherein the guard ring is on a same layer as the first and second coupling patterns and comprises a same material as the first and second coupling patterns.

24. A touch screen panel comprising:

a transparent substrate;

a plurality of first sense cells arranged in rows extending in a first direction on the transparent substrate;

a plurality of second sense cells arranged in columns extending in a second direction on the transparent substrate;

a dielectric layer on the first and second sense cells and having first and second contact holes overlapped with the first and second sense cells, respectively;

a plurality of first coupling patterns on the dielectric layer and overlapping the first contact holes and the first sense cells, the first coupling patterns coupling adjacent ones of the first sense cells to each other; and

a plurality of second coupling patterns on the dielectric layer and overlapping the second contact holes and the second sense cells, the second coupling patterns coupling adjacent ones of the second sense cells to each other and being spaced from the first coupling patterns,

wherein at least a portion of the plurality of first sense cells and at least a portion of the plurality of second sense cells are between the transparent substrate and the dielectric layer,

wherein the plurality of first coupling patterns and the plurality of second coupling patterns are at a same layer on a same side of the transparent substrate and do not cross each other,

wherein an entire bottom surface of the plurality of first coupling patterns and the plurality of second coupling patterns are spaced from the transparent substrate, and

wherein the plurality of first coupling patterns and the plurality of second coupling patterns are implemented with low-resistance material rather than transparent conductive material.

25. The touch screen panel as claimed in claim 24, further comprising:

a plurality of metal patterns on edge portions of a display area on which the first and second sense cells are formed, the metal patterns electrically coupling the first and second sense cells column-by-column or row-by-row to position detecting lines.

26. The touch screen panel as claimed in claim 25, wherein the first and second coupling patterns and the metal patterns are on a same layer and are constituted of a metal having a resistance value that is lower than that of a material constituting the first and second sense cells.

27. The touch screen panel as claimed in claim 24, wherein the first sense cells and the second sense cells are alternately arranged and not overlapping with each other.

28. The touch screen panel as claimed in claim 24, wherein at least one of the second coupling patterns electrically couple two adjacent ones of the second sense cells to each other.

29. The touch screen panel as claimed in claim 24, wherein the second coupling patterns partially overlap with the first sense cells adjacent to the second sense cells coupled by the second coupling patterns.

30. The touch screen panel as claimed in claim 24, further comprising:

a dummy line on the transparent substrate between the first and second sense cells;

a guard ring on a peripheral region of a display area on which the first and second sense cells are located, the guard ring being on the transparent substrate and surrounding the display area; and

a third contact hole on the dielectric layer corresponding to an end portion of the dummy line,

wherein the guard ring and the dummy line are electrically coupled to each other through the third contact hole.

31. The touch screen panel as claimed in claim 30, wherein the dummy line is formed on a same layer as the first and second sense cells and comprises a same transparent conductive material as the first and second sense cells.

32. The touch screen panel as claimed in claim 30, wherein the dummy line is formed in a mesh type comprising intersecting lines coupled to each other, and being on an area between the first and second sense cells.

33. The touch screen panel as claimed in claim 32, wherein the dummy line comprises a plurality of end portions extending to an area outside of the display area on which the first and second sense cells are located, and

the third contact hole comprises a plurality of third contact holes, the plurality of end portions being electrically coupled to the guard ring through the plurality of third contact holes.

34. The touch screen panel as claimed in claim 30, wherein the guard ring is on a same layer as the first and second coupling patterns and is formed of a same material as the first and second coupling patterns.

35. The touch screen panel as claimed in claim 24, wherein the transparent substrate is an upper substrate of a display panel constituting a flat panel display.

36. The touch screen panel as claimed in claim 35, wherein the first and second coupling patterns are slantly formed at an angle.

37. A fabrication method of a touch screen panel, the method comprising:

forming a plurality of first sense cells arranged in rows extending in a first direction on a transparent substrate;

forming a plurality of second sense cells arranged in columns extending in a second direction on the transparent substrate;

forming a dielectric layer on the first and second sense cells, the dielectric layer having first and second contact holes overlapped with the first and second sense cells, respectively;

forming a plurality of first coupling patterns on the dielectric layer to couple the adjacent first sense cells to each other through the first contact holes, the first coupling patterns being overlapped with the first sense cells and the first contact holes; and

forming a plurality of second coupling patterns on the dielectric layer to couple the adjacent second sense cells to each other through the second contact holes, the second coupling patterns being overlapped with the second sense cells and the second contact holes,

wherein at least a portion of the plurality of first sense cells and at least a portion of the plurality of second sense cells are between the transparent substrate and the dielectric layer,

wherein the second coupling patterns are spaced from the first coupling patterns,

wherein the plurality of first coupling patterns and the plurality of second coupling patterns are at a same layer on a same side of the transparent substrate and do not cross each other,

wherein an entire bottom surface of the plurality of first coupling patterns and the plurality of second coupling patterns are spaced from the transparent substrate, and

wherein the plurality of first coupling patterns and the plurality of second coupling patterns are implemented with low-resistance material rather than transparent conductive material.

38. The fabrication method of the touch screen panel as claimed in claim 37, further comprising:

forming a plurality of metal patterns on edge regions of a display area on which the first and second sense cells are formed, the metal patterns being on the transparent substrate and electrically coupling the first and second sense cells column-by-column or row-by-row to position detecting lines.

39. The fabrication method of the touch screen panel as claimed in claim 38, wherein the first and second coupling patterns and the metal patterns are formed on a same layer and are constituted of a metal having a resistance value lower than that of a material constituting the first and second sense cells.

40. The fabrication method of the touch screen panel as claimed in claim 37, wherein the second sense cells and the first sense cells are alternately arranged and not overlapping with each other.

41. The fabrication method of the touch screen panel as claimed in claim 37, further comprising:

forming a dummy line on the transparent substrate between the first and second sense cells;

forming a guard ring on a peripheral region of a display area on which the first and second sense cells are located on the dielectric layer, the guard ring surrounding the display area; and

forming a third contact hole on the dielectric layer corresponding to an end portion of the dummy line,

wherein the guard ring and the dummy line are electrically coupled to each other through the third contact hole.

42. The fabrication method of the touch screen panel as claimed in claim 41, wherein the dummy line is on a same layer as the first and second sense cells and comprises a same transparent conductive material as the first and second sense cells.

43. The fabrication method of the touch screen panel as claimed in claim 41, wherein the guard ring is on a same layer as the first and second coupling patterns and comprises a same material as the first and second coupling patterns.