Touch screen panel including mesh pattern and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9836170-B2
Application number	US-201514857042-A
Country	US
Kind code	B2
Filing date	Sep 17, 2015
Priority date	Jan 16, 2015
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A touch screen panel includes a substrate including an active area and a non-active area disposed at an external side of the active area, first sensing electrodes disposed in the active area, the first sensing electrodes connected to each other and extending in a first direction, first connection patterns connecting adjacent first sensing electrodes, second sensing electrodes connected to each other and extending in a second direction crossing the first direction, second connection patterns connecting adjacent second sensing electrodes, and metal mesh patterns overlapping first portions of the first or second sensing electrodes.

First claim

What is claimed is:

1. A touch screen panel, comprising:
a substrate comprising an active area and a non-active area disposed at an external side of the active area;
first sensing electrodes disposed in the active area, the first sensing electrodes connected to each other and extending in a first direction;
first connection patterns connecting adjacent first sensing electrodes;
second sensing electrodes connected to each other and extending in a second direction crossing the first direction;
second connection patterns connecting adjacent second sensing electrodes; and
metal mesh patterns disposed on the substrate,
wherein:
the first and second sensing electrodes each have a central portion and an edge portion surrounding the central portion; and
the metal mesh patterns overlap, within the first or second sensing electrodes, only the edge portions of the first or second sensing electrodes.

2. The touch screen panel of claim 1 , wherein the first sensing electrodes and the second sensing electrodes are disposed on the same layer.

3. The touch screen panel of claim 1 , wherein the first and second sensing electrodes and the first and second connection patterns comprise a transparent conductive oxide.

4. The touch screen panel of claim 1 , wherein one of the first and second connection patterns comprise a low resistance metal material.

5. The touch screen panel of claim 1 , wherein the metal mesh patterns comprise a low resistance metal material.

6. The touch screen panel of claim 4 , wherein the low resistance metal material comprises at least one of molybdenum (Mo), silver (Ag), gold (Au), titanium (Ti), copper (Cu), aluminum (Al), and a molybdenum/aluminum/molybdenum (Mo/Al/Mo) alloy.

7. The touch screen panel of claim 1 , wherein panel visibility or a resistance characteristic of the touch screen panel is configured to vary according to a size of the edge portions.

8. The touch screen panel of claim 1 , wherein panel visibility or a resistance characteristic of the touch screen panel is configured to vary according to a density of the metal mesh patterns in the edge portions.

9. The touch screen panel of claim 1 , wherein a coupling capacitance between the first and second sensing electrodes is configured to vary according to a shape of the edge portions.

10. The touch screen panel of claim 1 , wherein a width of the metal mesh patterns is less than 5 μm.

11. The touch screen panel of claim 1 , further comprising an interlayer insulating layer disposed between the substrate and one of the first and second sensing electrodes and overlapping only the central portion of the one of the first and second sensing electrodes.

12. A method of manufacturing a touch screen panel, the method comprising:
forming first sensing electrodes in a first direction on an active area of a substrate;
forming first connection patterns in the first direction to connect the first sensing electrodes to each other;
forming second sensing electrodes between the first sensing electrodes in a second direction crossing the first direction;
forming second connection patterns in the second direction to connect the second sensing electrodes to each other; and
forming metal mesh patterns on the substrate,
wherein:
the first and second sensing electrodes each has a central portion and an edge portion surrounding the central portion; and
the metal mesh patterns overlap, within the first or second sensing electrodes, only the edge portions of the first sensing electrodes or the second sensing electrodes.

13. The method of claim 12 , wherein the first and second sensing electrodes and the first and second connection patterns comprise a transparent conductive oxide.

14. The method of claim 12 , wherein one of the first and second connection patterns comprise a low resistance metal material.

15. The method of claim 14 , wherein one of the first and second connection patterns are formed together with the metal mesh patterns at the same time, when one of the first and second connection patterns comprise the low resistance metal material.

16. The method of claim 12 , wherein one of the first and second sensing electrodes covers the metal mesh patterns.

17. The method of claim 12 , wherein forming the metal mesh patterns comprises:
forming the metal mesh patterns on the edge portions after forming the one of the first and second sensing electrodes.

18. The method of claim 12 , further comprising forming an interlayer insulating layer between the substrate and one of the first and second sensing electrodes comprising the first portions,
wherein the interlayer insulating layer is not disposed on the first portions.

19. The method of claim 12 , wherein a width of the metal mesh patterns is less than 5 μm.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Yeon-Tae
• No Young-Soo
• Jeong Hwan-Hee
• Han In-Young

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 Primary

  by capacitive means · CPC title

• G06F2203/04103

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