Touch panel and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10120229-B2
Application number	US-201815866141-A
Country	US
Kind code	B2
Filing date	Jan 9, 2018
Priority date	Jan 19, 2011
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

Disclosed are a touch panel and a method for manufacturing the same. The touch panel according to one embodiment includes the touch panel including a substrate, a first transparent electrode including a first sensor part formed on the substrate in a first direction and a first electrode connection part for electric connection of the first sensor part, and a second transparent electrode electrically insulated from the first transparent electrode, and including a second sensor part formed in a second direction crossing the first direction and a second electrode connection part for electric connection of the second sensor part. The second electrode connection part has a mesh shape. The touch panel according to another embodiment includes a substrate, a transparent electrode base spaced apart from the substrate, and a transparent electrode on the transparent electrode base. The transparent electrode comprises a first electrode including a first sensor part formed in one direction and a first electrode connection part for electrical connection of the first sensor part; and a second electrode, which is electrically insulated from the first electrode, and includes a second sensor part formed in a second direction crossing the first direction and a second electrode connection part for electrical connection of the second sensor part. The second electrode connection part has a mesh shape.

First claim

The invention claimed is:

1. A touch panel comprising:
a substrate including a first surface and a second surface opposite to each other;
a first transparent electrode including a first sensor part formed on the substrate in a first direction and
a first electrode connection part for electric connection of the first sensor part on the first surface of the substrate;
a second transparent electrode electrically insulated from the first transparent electrode, and including
a second sensor part formed in a second direction crossing the first direction and
a second electrode connection part for electric connection of the second sensor part on the first surface of the substrate;
an interconnection connected to the first transparent electrode and the second transparent electrode on the first surface of the substrate; and
an intermediate layer provided on the first surface of the substrate;
wherein the first sensor part, the first electrode connection part, the second sensor part, the second electrode connection part, and the interconnection are disposed on the first surface of the substrate;
wherein the second electrode connection part has a mesh shape comprising a plurality of mesh lines formed in at least two layers, the at least two layers of the second electrode connection part comprising a first layer and a second layer disposed on the first layer;
wherein the second electrode connection part has a line width of the mesh lines in a range of 1 nm to 5 μm;
wherein the intermediate layer is disposed between the second electrode connection part and the first electrode connection part, and
wherein the intermediate layer includes a first contact hole and a second contact hole to electrically connect the second sensor part with the second electrode connection part,
wherein the plurality of mesh lines comprises a first outermost mesh line and a second outermost mesh line that are spaced apart from each other, and
wherein at least a part of the first outermost mesh line and at least a part of the second outermost mesh line are disposed on and overlap the first sensor part in a vertical direction perpendicular to the first surface of the substrate.

2. A touch panel comprising:
a substrate including a first surface and a second surface opposite to each other;
a transparent electrode base spaced apart from the second surface of the substrate, the transparent electrode base including a third surface and a fourth surface opposite to each other;
an intermediate layer and a transparent electrode disposed on the third surface of the transparent electrode base,
an interconnection connected to the transparent electrode on the third surface of the transparent electrode base; and
wherein the transparent electrode is disposed between the second surface of the substrate and the third surface of the transparent electrode base,
wherein the transparent electrode comprises a first electrode including a first sensor part formed in one direction and
a first electrode connection part for electrical connection of the first sensor part; and
a second electrode, which is electrically insulated from the first electrode, including a second sensor part formed in a second direction crossing the first direction and
a second electrode connection part for electrical connection of the second sensor part;
wherein the second electrode connection part has a mesh shape comprising a plurality of mesh lines formed in at least two layers, the at least two layers of the second electrode connection part comprising a first layer and a second layer disposed on the first layer;
wherein the second electrode connection part has a line width of the mesh lines in a range of 1 nm to 5 μm;
wherein the intermediate layer is disposed between the second electrode connection part and the first electrode connection part,
wherein the intermediate layer includes a first contact hole and a second contact hole to electrically connect the second sensor part with the second electrode connection part,
wherein the plurality of mesh lines comprises a first outermost mesh line and a second outermost mesh line that are spaced apart from each other, and
wherein at least a part of the first outermost mesh line and at least a part of the second outermost mesh line are disposed on and overlap the first sensor part in a vertical direction perpendicular to the first surface of the substrate.

3. The touch panel of claim 1 , wherein the intermediate layer is disposed on the second electrode connection part, and the first electrode connection part is disposed on the intermediate layer.

4. The touch panel of claim 2 , wherein the intermediate layer is disposed on the second electrode connection part, and the first electrode connection part is disposed on the intermediate layer.

5. The touch panel of claim 1 , wherein the second electrode connection part has an extended width in a middle portion thereof, and wherein the first outermost mesh line and the second outermost mesh line are spaced apart from each other by a maximum distance at an intermediate point between the first contact hole and the second contact hole.

6. The touch panel of claim 2 , wherein the second electrode connection part has an extended width in a middle portion thereof, and wherein the first outermost mesh line and the second outermost mesh line are spaced apart from each other by a maximum distance at an intermediate point between the first contact hole and the second contact hole.

7. The touch panel of claim 1 , wherein the plurality of mesh lines comprise the first outermost mesh line and the second outermost mesh line that are spaced apart from each other, wherein the first outermost mesh line is disposed across the first contact hole and the second contact hole.

8. The touch panel of claim 2 , wherein the plurality of mesh lines comprise the first outermost mesh line and the second outermost mesh line that are spaced apart from each other, wherein the first outermost mesh line is disposed across the first contact hole and the second contact hole.

9. The touch panel of 6 , wherein the first outermost mesh line and the second outermost mesh line are spaced apart from each other by a second distance at a point closer to the first contact hole than to the intermediate point between the first contact hole and the second contact hole,
wherein the second distance is less than the maximum distance.

10. The touch panel of claim 2 , wherein at least a portion of the first transparent electrode is aligned on a same layer with at least a portion of the second transparent electrode.

11. The touch panel of claim 2 , further comprising a protective layer formed on the first transparent electrode or the second transparent electrode.

12. The touch panel of claim 2 , further comprising an anti-reflective layer formed on at least one of the second surface of the substrate, the first transparent electrode, and the second transparent electrode.

13. The touch panel of claim 1 , wherein the second electrode connection part includes at least one selected from the group consisting of chrome (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), and alloys thereof.

14. The touch panel of claim 2 , wherein the second electrode connection part includes at least one selected from the group consisting of chrome (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), and alloys thereof.

15. The touch panel of claim 6 , wherein the maximum distance between the first outermost mesh line and the second outermost mesh line is greater than a length of the first electrode connection part

Assignees

• Lg Innotek Co Ltd

Inventors

• Chai Kyoung Hoon
• Kim Byung Soo
• Lee Keun Sik
• Lee Sun Hwa
• Seo Chung Won
• Hong Hyuk Jin

Classifications

• 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

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F3/044

  by capacitive means · CPC title

• G02F1/13338 Primary

  Input devices, e.g. touch panels · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title