Touch sensor device including a polymer layer having conductive and non-conductive regions

Patent metadata

Field	Value
Publication number	US-10254902-B2
Application number	US-201514844394-A
Country	US
Kind code	B2
Filing date	Sep 3, 2015
Priority date	Jan 28, 2015
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A touch sensor device includes first touch electrodes and second touch electrodes disposed on a substrate, and a polymer layer including a polymer material disposed on the first and second touch electrodes and on a substantially entire area of the substrate, in which the polymer layer includes conductive and non-conductive regions.

First claim

What is claimed is:

1. A touch sensor device, comprising:
first touch electrodes and second touch electrodes disposed on a substrate; and
a polymer layer comprising a polymer material formed on a substantially entire area of the substrate, the polymer layer disposed in a different layer from a layer where the first and second touch electrodes are disposed over the substrate,
wherein:
the polymer layer comprises conductive and non-conductive regions;
the conductive region of the polymer layer comprises a first connecting portion, the first connecting portion comprises the polymer material and connects adjacent ones of the first touch electrodes to each other;
the first touch electrode comprises at least two conductive layers and a first portion of the conductive region of the polymer layer, the at least two conductive layers of the first touch electrode disposed between the substrate and the first portion; and
the second touch electrode comprises at least two conductive layers and a second portion of the conductive region of the polymer layer, the at least two conductive layers of the second touch electrode disposed between the substrate and the second portion.

2. The touch sensor device of claim 1 , further comprising a second connecting portion connecting adjacent second touch electrodes,
wherein the first and second connecting portions are insulated from and cross each other.

3. The touch sensor device of claim 2 , further comprising a first insulator disposed between the first connecting portion and the second connecting portion.

4. The touch sensor device of claim 3 , wherein:
the first insulator comprises a recess portion extending from a first end to a second end of the first insulator; and
a portion of the first connecting portion is disposed on the recess portion.

5. The touch sensor device of claim 3 , wherein
the first touch electrodes comprise a first conductive layer;
the conductive region of the polymer layer comprises:
a first conductive portion that is disposed on the first touch electrode and directly connected to the first connecting portion; and
the second touch electrodes comprise a second conductive portion that is disposed on the second touch electrode and insulated from the first connecting portion.

6. The touch sensor device of claim 5 , wherein the first conductive portion and the second conductive portion have a mesh structure.

7. The touch sensor device of claim 5 , further comprising:
a first touch wire connected to the first touch electrodes; and
a second touch wire connected to the second touch electrodes,
wherein:
a pad portion of the first and second touch wires comprises conductive layers; and
the conductive region of the polymer layer comprises a portion disposed on and connected to one of the conductive layers of the pad portion.

8. The touch sensor device of claim 7 , further comprising a second insulator covering the first and second touch wires except for the pad portion.

9. The touch sensor device of claim 2 , further comprising an insulating layer disposed between the first connecting portion and the second connecting portion and on an entire surface of the substrate,
wherein:
the insulating layer comprises first and second contact holes respectively exposing adjacent first touch electrodes; and
the first connecting portion connects the adjacent first touch electrodes through the first and second contact holes.

10. The touch sensor device of claim 9 , wherein:
the insulating layer comprises at least one recess portion connecting the first contact hole and the second contact hole; and
a portion of the first connecting portion is disposed on the recess portion.

11. A touch sensor device, comprising:
touch wires and first connecting portions disposed on a substrate; and
a polymer layer comprising a polymer material formed on a substantially entire area of the substrate, the polymer layer disposed in a different layer from a layer where the touch wires and the first connecting portions are disposed over the substrate,
wherein:
the polymer layer comprises conductive and non-conductive regions;
the conductive region of the polymer layer comprises first touch electrodes and second touch electrodes;
the first touch electrode of the polymer layer contacts the first connecting portion, and the first connecting portion connects adjacent ones of the first touch electrodes to each other;
the first touch electrode comprises at least two conductive layers and a first portion of the conductive region of the polymer layer, the at least two conductive layers of the first touch electrode disposed between the substrate and the first portion; and
the second touch electrode comprises at least two conductive layers and a second portion of the conductive region of the polymer layer, the at least two conductive layers of the second touch electrode disposed between the substrate and the second portion.

12. The touch sensor device of claim 11 , further comprising:
a second connecting portion connecting adjacent second touch electrodes; and
a first insulator disposed between the first connecting portion and the second connecting portion.

13. The touch sensor device of claim 12 , wherein:
a pad portion of the touch wires comprises conductive layers; and
the conductive region of the polymer layer comprises a portion disposed on and connected to one of the conductive layers of the pad portion.

14. A manufacturing method of a touch sensor device, the method comprising:
forming first touch electrodes, second touch electrodes, and touch wires connected to the first and second touch electrodes on a substrate;
forming a polymer layer by coating a polymer material on a substantially entire surface of the substrate;
forming a mask pattern on the polymer layer;
forming a non-conductive region by oxidizing the polymer layer exposed by the mask pattern; and
forming a conductive region covered by the mask pattern,
wherein:
the first touch electrode comprises at least two conductive layers and a first portion of the conductive region of the polymer layer, the at least two conductive layers of the first touch electrode disposed between the substrate and the first portion; and
the second touch electrode comprises at least two conductive layers and a second portion of the conductive region of the polymer layer, the at least two conductive layers of the second touch electrode disposed between the substrate and the second portion.

15. The manufacturing method of claim 14 , wherein the conductive region of the polymer layer comprises a first connecting portion connecting adjacent first touch electrodes.

16. The manufacturing method of claim 15 , wherein forming the first and second touch electrodes further comprises:
forming a second connecting portion connecting adjacent second touch electrodes; and
forming a first insulator covering the second connecting portion after forming of the first and second touch electrodes.

17. The manufacturing method of claim 16 , wherein the first insulator comprises a recess portion extending from one end to the other end of the first insulator.

18. The manufacturing method of claim 15 , wherein:
forming the first and second touch electrodes further comprises:
forming a second connecting portion connecting adjacent second touch electrodes; and
forming an insulating layer on an entire surface of the substrate after forming the first and second touch electrodes;
the insulating layer comprises first and second contact holes exposing the adjacent first touch

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Byeong-Jin
• Kang Sung Ku
• Kim Jung-Yun
• Bae Joo-Han
• Lee Dong Eun
• Lee In Nam

Classifications

• G06F2203/04102

  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 title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04111

  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 title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title