TOUCH SENSOR DEVICE AND MANUFACTURING METHOD THEREOF

• US 20160320872A1
• Filed: 10/19/2015
• Published: 11/03/2016
• Est. Priority Date: 04/30/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Byeong-Jin, KANG, Sung Ku, KIM, Jung-Yun
• Granted Patent: US 9,921,697 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 2203/04111 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 3/0443 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 touch sensor device including a first conductive pattern disposed on a substrate and a first polymer layer disposed on the first conductive pattern. The first polymer layer includes a first conductive region and a first non-conductive region. The touch sensor device also includes a second polymer layer disposed on the first polymer layer. The second polymer layer includes a second conductive region and a second non-conductive region.

Claims

1. A touch sensor device, comprising:

a first conductive pattern disposed on a substrate;

a first polymer layer disposed on the first conductive pattern, the first polymer layer comprising a first conductive region and a first non-conductive region; and

a second polymer layer disposed on the first polymer layer, the second polymer layer comprising a second conductive region and a second non-conductive region.

2. The touch sensor device of claim 1, wherein:

the first polymer layer and the second polymer layer each are formed over an entire surface of the substrate.

3. The touch sensor device of claim 2, wherein:

a thickness of each of the first conductive region and the first non-conductive region are substantially the same and a thickness of each of the second conductive region and the second non-conductive region are substantially the same.

4. The touch sensor device of claim 1, wherein:

the first conductive pattern comprises first touch electrodes and second touch electrodes, and

the second conductive region of the second polymer layer comprises a first connection part that electrically connects two adjacent first touch electrodes.

5. The touch sensor device of claim 4, wherein:

the first conductive region of the first polymer layer comprises a portion that is connected to a portion of the first touch electrodes and the first connection part.

6. The touch sensor device of claim 5, wherein:

the second conductive region of the second polymer layer comprises a portion that is connected to the first connection part and disposed on the first touch electrodes, and a portion that is insulated from the first connection part and disposed on the second touch electrodes.

7. The touch sensor device of claim 6, wherein:

a portion of the second conductive region of the second polymer layer that is disposed on the first touch electrodes and the second touch electrodes has a mesh type.

8. The touch sensor device of claim 5, further comprising:

a second connection part connecting two adjacent second touch electrodes,

wherein the first connection part and the second connection part are insulated from each other by the first non-conductive region of the first polymer layer.

9. The touch sensor device of claim 5, wherein:

the first conductive region of the first polymer layer comprises a portion that is disposed on the first touch electrodes.

10. The touch sensor device of claim 4, further comprising:

a first touch wire connected to the first touch electrodes; and

a second touch wire connected to the second touch electrodes,

wherein the first non-conductive region of the first polymer layer comprises a portion covering the first touch wire and the second touch wire, and

the first conductive region of the first polymer layer is disposed on a pad part of the first and second touch wires.

11. The touch sensor device of claim 10, wherein:

the first conductive region of the second polymer layer comprises a portion that is disposed on the pad part.

12. The touch sensor device of claim 1, wherein:

the first conductive pattern comprises touch wires and first connection parts.

13. The touch sensor device of claim 12, wherein:

the second conductive region of the second polymer layer comprises first touch electrodes, second touch electrodes, and a second connection part connecting two adjacent second touch electrodes.

14. The touch sensor device of claim 13, wherein:

the first conductive region of the first polymer layer comprises a portion that is connected to first touch electrodes and the first connection parts.

15. The touch sensor device of claim 14, wherein:

the first connection parts and the second connection part are insulated from each other by the first non-conductive region of the first polymer layer.

16. A manufacturing method of a touch sensor device, comprising:

stacking and patterning a conductive layer on a substrate to form a first conductive pattern;

applying a first polymer material on an entire surface of the first conductive pattern to form a first polymer layer;

disposing a first mask pattern on a portion of the first polymer layer;

oxidizing the portion of the first polymer layer not covered by the first mask pattern to form a first non-conductive region in the portion of the first polymer layer not covered by the first mask pattern and a first conductive region in the portion covered by the first mask pattern;

applying a second polymer material on an entire surface of the first polymer layer to form a second polymer layer; and

disposing a second mask pattern on a portion of the second polymer layer;

oxidizing the portion of the second polymer layer not covered by the second mask pattern to form a second non-conductive region in the portion of the second polymer layer not covered by the second mask pattern and a second conductive region covered by the second mask pattern.

17. The manufacturing method of claim 16, wherein:

the forming of the first conductive pattern comprises disposing first touch electrodes and second touch electrodes on the substrate, and first and second touch wires connected to the first and second touch electrodes; and

the second conductive region of the second polymer layer comprises a first connection part that electrically connects two adjacent first touch electrodes.

18. The manufacturing method of claim 17, wherein:

the first conductive region of the first polymer layer comprises a portion that is connected to the first touch electrodes and the first connection part.

19. The manufacturing method of claim 16, wherein:

the forming of the first conductive pattern comprises disposing touch wires and first connection parts.

20. The manufacturing method of claim 19, wherein:

the second conductive region of the second polymer layer comprises first touch electrodes, second touch electrodes, and a second connection part connecting two adjacent second touch electrodes.