Touch panel and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9535543-B2
Application number	US-201113810073-A
Country	US
Kind code	B2
Filing date	Jul 13, 2011
Priority date	Jul 14, 2010
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A touch panel according to the embodiment includes a substrate; a first electrode formed on the substrate in a first direction and including a plurality of sensor parts and connection parts connecting the sensor parts with each other; and a second electrode formed in a second direction crossing the first direction while being insulated from the first electrode and including a plurality of sensor parts and connection parts connecting the sensor parts with each other. The sensor parts and the connection parts include transparent conductive materials, and the connection parts have resistance lower than resistance of the sensor parts in at least one of the first and second electrodes.

First claim

The invention claimed is:

1. A touch panel comprising:
a substrate;
a first electrode formed on the substrate in a first direction and including a plurality of first sensor parts and first connection parts connecting the first sensor parts with each other;
an insulating layer formed on the first connection parts of the first electrode; and
a second electrode formed in a second direction crossing the first direction while being insulated from the first electrode by the insulating layer and including a plurality of second sensor parts and second connection parts connecting the second sensor parts with each other;
wherein the first and second sensor parts and the first and second connection parts include transparent conductive materials,
wherein each first connection part is thicker than each first sensor part and each second connection part is thicker than each second sensor part,
wherein the first and second electrodes are disposed on a same surface of the substrate,
wherein the insulating layer has a thickness in a range of 0.1 μm to 100 μm,
wherein the insulating layer is spaced apart from the plurality of sensor parts of the first electrode and the plurality of sensor parts of the second electrode, and
wherein each connection part is in direct contact with sensor parts of the plurality of sensor parts.

2. The touch panel of claim 1 , wherein the first and second connection parts of at least one of the first and second electrodes include at least one selected from the group consisting of a carbon nano tube, a nano wire and a conductive polymer.

3. The touch panel of claim 1 , wherein the first connection parts are thicker than the first sensor parts by 1.5 to 10 times, the second connection parts are thicker than the second sensor parts by 1.5 to 10 times, or both.

4. The touch panel of claim 1 , wherein the first and second sensor parts include at least one selected from the group consisting of an indium tin oxide, an indium zinc oxide, a carbon nano tube, a Ag nano wire and a conductive polymer.

5. A touch panel comprising:
a substrate;
a first electrode formed on the substrate in a first direction and including a plurality of first sensor parts and first connection parts connecting the first sensor parts with each other;
an insulating layer formed on the first connection parts of the first electrode; and
a second electrode formed in a second direction crossing the first direction while being insulated from the first electrode by the insulating layer and including a plurality of second sensor parts and second connection parts connecting the second sensor parts with each other;
wherein each first connection part is thicker than each first sensor part and each second connection part is thicker than each second sensor part,
wherein the first and second electrodes are disposed on a same surface of the substrate,
wherein the insulating layer has a thickness in a range of 0.1 μm to 100 μm,
wherein the insulating layer is spaced apart from the plurality of sensor parts of the first electrode and the plurality of sensor parts of the second electrode, and
wherein each connection part is in direct contact with sensor parts of the plurality of sensor parts.

6. The touch panel of claim 5 , wherein the first and second connection parts include a carbon nanotube or a nanowire distributed in a conductive polymer.

7. A method for manufacturing a touch panel, the method comprising:
forming a plurality of first sensor parts and second sensor parts including transparent conductive materials on a substrate;
forming first connection parts connecting the first sensor parts with each other by printing a transparent conductive composition on the substrate;
forming an insulating layer including an insulating material on the first connection parts; and
forming second connection parts connecting the second sensor parts with each other on the insulating layer by using the transparent conductive composition;
wherein each first connection part is thicker than each first sensor part and each second connection part is thicker than each second sensor part,
wherein first and second electrodes are disposed on a same surface of the substrate,
wherein the insulating layer has a thickness in a range of 0.1 μm to 100 μm,
wherein the insulating layer is spaced apart from the plurality of sensor parts of the first electrode and the plurality of sensor parts of the second electrode,
wherein each first connection part is in direct contact with first sensor parts of the plurality of first sensor parts, and
wherein each second connection part is in direct contact with second sensor parts of the plurality of second sensor parts.

8. The method of claim 7 , wherein the forming of the insulating layer comprises printing the insulating material.

9. The method of claim 7 , wherein the forming of the second connection parts comprises printing the transparent conductive composition.

10. The method of claim 7 , wherein a width of the second connection parts is 1% to 99% based on a width of the insulating layer.

11. The method of claim 7 , wherein resistance of the connection parts is lower than resistance of the sensor parts in at least one of the first and second electrodes.

12. The method of claim 11 , wherein the connection parts of at least one of the first and second electrodes include at least one selected from the group consisting of a carbon nano tube, a nano wire and a conductive polymer.

13. A method for manufacturing a touch panel, the method comprising:
forming a plurality of first sensor parts, a plurality of second sensor parts and first connection parts connecting the first sensor parts with each other on a substrate by using a transparent conductive material;
forming an insulating layer by printing an insulating material on the first connection parts, wherein the insulating layer has a thickness in a range of 0.1 μm to 100 μm; and
forming second connection parts connecting the second sensor parts with each other on the insulating layer by using a transparent conductive composition;
wherein each first connection part is thicker than each first sensor part and each second connection part is thicker than each second sensor part,
wherein first and second electrodes are disposed on a same surface of the substrate,
wherein the insulating layer has a thickness in a range of 0.1 μm to 100 μm,
wherein the insulating layer is spaced apart from the plurality of sensor parts of the first electrode and the plurality of sensor parts of the second electrode,
wherein each first connection part is in direct contact with first sensor parts of the plurality of first sensor parts, and
wherein each second connection part is in direct contact with second sensor parts of the plurality of second sensor parts.

14. The method of claim 13 , wherein the forming of the second connection parts comprises printing the transparent conductive composition.

Assignees

• Lee Dong Youl
• Lee Yong Jin
• You Young Sun
• Chai Kyoung Hoon
• Noh Young Jin
• Lg Innotek Co Ltd

Inventors

• Lee Dong Youl
• Lee Yong Jin
• You Young Sun
• Chai Kyoung Hoon
• Noh Young Jin

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · 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

• 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