Touch panel and touch device with the same

Patent metadata

Field	Value
Publication number	US-9489101-B2
Application number	US-201414226320-A
Country	US
Kind code	B2
Filing date	Mar 26, 2014
Priority date	Mar 26, 2013
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A touch panel includes a substrate; and a sensing electrode with a conductive pattern on the substrate, wherein the sensing electrode includes: an electrode layer; and a first buffer layer on the electrode layer.

First claim

What is claimed is:

1. A touch panel comprising:
a substrate comprising an active area to detect a position of an input device and an inactive area provided at a peripheral portion of the active area;
a sensing electrode with a plurality of conductive patterns on the substrate;
a top buffer layer disposed on a top surface of the sensing electrode; and
a bottom buffer layer disposed at a bottom surface of the sensing electrode;
wherein the sensing electrode is arranged with a shape of a mesh;
wherein the sensing electrode comprises a metal;
wherein a line width of the top buffer layer is greater than a line width of the sensing electrode;
wherein a ratio of the line width of the sensing electrode to the line width of the top buffer layer is in a range of 1:1.3 to 1:2;
wherein a line width of the bottom buffer layer is greater than the line width of the sensing electrode;
wherein the top buffer layer comprises a first reflection prevention part and a second reflection prevention part surrounding the first reflection prevention part, and the second reflection prevention part is disposed on a lateral side of the sensing electrode;
wherein the top buffer layer and the bottom buffer layer each comprises a darkening layer;
wherein the second reflection prevention part is spaced apart from the lateral side of the sensing electrode;
wherein an end of the top buffer layer is disposed at a level lower than a height of the top surface of the sensing electrode;
wherein the second reflection prevention part is formed with an acute inclination angle with respect to the lateral side of the sensing electrode,
wherein the second reflection prevention part is bent toward the substrate from the first reflection prevention part,
wherein the bottom buffer layer is formed with a vertical inclination angle with respect to the lateral side of the sensing electrode,
wherein the substrate is exposed between adjacent conductive patterns of the plurality of conductive patterns,
wherein the sensing electrode is disposed on the active area of the substrate, and
wherein the top buffer layer comprises material of a different etching rate in reaction to an etching than does the sensing electrode.

2. The touch panel of claim 1 , wherein the sensing electrode further comprises a first sub-pattern, and the sensing electrode and the top buffer layer are disposed on the first sub-pattern.

3. The touch panel of claim 1 , wherein the sensing electrode and the top buffer layer comprise mutually different materials.

4. The touch panel of claim 1 , wherein an area of a top surface of the top buffer layer is wider than an area of the top surface of the sensing electrode.

5. The touch panel of claim 1 , wherein a portion of the top buffer layer is spaced apart from the sensing electrode.

6. The touch panel of claim 1 , further comprising a third reflection prevention part being bent and extending from the second reflection prevention part.

7. The touch panel of claim 6 , wherein the third reflection prevention part is spaced apart from the substrate.

8. The touch panel of claim 1 , wherein the sensing electrode comprises at least one of Cu, Au, Ag, Al, Ti, Ni, and an alloy thereof.

9. The touch panel of claim 1 , wherein the top buffer layer comprises at least one of metal oxide, metal nitride, and metal oxynitride.

10. The touch panel of claim 1 , further comprising
a wire electrically connected to the sensing electrode; and
a pad disposed at an end of the wire,
wherein the pad comprises a first pad layer and a second pad layer on the first pad layer.

11. The touch panel of claim 10 , wherein the wire comprises a first wire layer, and
wherein the sensing electrode, the first wire layer, and the first pad layer each comprises a same material.

12. The touch panel of claim 11 , further comprising a first buffer layer of the wire on the first wire layer.

13. The touch panel of claim 11 , further comprising a conductive layer under at least one of the sensing electrode, the first wire layer, and the first pad layer.

14. The touch panel of claim 1 , wherein the etching rate of the top buffer layer is slower than that of the sensing electrode.

15. A touch device comprising:
a touch panel;
wherein the touch panel comprises:
a substrate comprising an active area to detect a position of an input device and an inactive area provided at a peripheral portion of the active area;
a sensing electrode with a plurality of conductive patterns on the substrate;
a top buffer layer disposed on a top surface of the sensing electrode; and
a bottom buffer layer disposed at a bottom surface of the sensing electrode;
wherein the sensing electrode is arranged with a shape of a mesh;
wherein the sensing electrode comprises a metal;
wherein a line width of the top buffer layer is greater than a line width of the sensing electrode;
wherein a ratio of the line width of the sensing electrode to the line width of the top buffer layer is in a range of 1:1.3 to 1:2;
wherein a line width of the bottom buffer layer is greater than the line width of the sensing electrode;
wherein the top buffer layer comprises a first reflection prevention part and a second reflection prevention part surrounding the first reflection prevention part, and the second reflection prevention part is disposed on a lateral side of the sensing electrode;
wherein the top buffer layer and the bottom buffer layer each comprises a darkening layer;
wherein the second reflection prevention part is spaced apart from the lateral side of the sensing electrode;
wherein an end of the top buffer layer is disposed at a level lower than a height of the top surface of the sensing electrode;
wherein the second reflection prevention part is formed with an acute inclination angle with respect to the lateral side of the sensing electrode,
wherein the second reflection prevention part is bent toward the substrate from the first reflection prevention part,
wherein the bottom buffer layer is formed with a vertical inclination angle with respect to the lateral side of the sensing electrode,
wherein the substrate is exposed between adjacent conductive patterns of the plurality of conductive patterns,
wherein the sensing electrode is disposed on the active area of the substrate, and
wherein the to buffer layer comprises material of a different etching rate in reaction to an etching than does the sensing electrode.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Dong Keon
• Kim Hyun Soo
• Shin Jun Sik
• Yang Joon Hyuk
• Bang Jung Hwan
• Koo Chan Kyu

Classifications

• G06F3/046 Primary

  by electromagnetic means · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04103

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

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title