TOUCH SCREEN PANEL AND MANUFACTURING METHOD THEREOF

• US 20160299608A1
• Filed: 09/15/2015
• Published: 10/13/2016
• Est. Priority Date: 04/13/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHOI, Jong Hyun, HONG, Jung-Moo
• Granted Patent: US 10,101,858 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04102 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 Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 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 Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Abstract

An exemplary embodiment discloses a touch screen panel including a substrate, touch electrodes positioned in a touch area of the substrate and configured to sense a touch, connecting wirings connected to the touch electrodes, and pads positioned in a peripheral area of the substrate and connected to the electrodes. The touch electrodes include a first electrode and a second electrode positioned on the first electrode. The first electrode includes openings and the second electrode covers the first electrode and the openings of the first electrode.

Claims

1. A touch screen panel, comprising:

a substrate;

touch electrodes positioned in a touch area of the substrate and configured to sense a touch;

connecting wirings connected to the touch electrodes; and

pads positioned in a peripheral area of the substrate and connected to the electrodes,

wherein the touch electrodes comprising a first electrode and a second electrode positioned on the first electrode, and

the first electrode comprising openings and the second electrode covers the first electrode and the openings of the first electrode.

2. The touch screen panel of claim 1, wherein:

the first electrode comprises a metal nano wire.

3. The touch screen panel of claim 2, wherein:

the first electrode further comprises a polymer resin layer.

4. The touch screen panel of claim 1, wherein:

the second electrode comprises a conductive material.

5. The touch screen panel of claim 1, wherein:

a thickness of the second electrode is less than or equal to 300 Å

.

6. The touch screen panel of claim 1, wherein:

the pads comprise;

a first conductive layer positioned on the substrate;

a second conductive layer positioned on the first conductive layer; and

a first protective conductive layer positioned on the second conductive layer.

7. The touch screen panel of claim 6, wherein:

the first protective conductive layer is made of any one of copper (Cu), titanium (Ti), aluminum (Al), molybdenum (MO), and a transparent conducting oxide (TCO).

8. The touch screen panel of claim 1, wherein:

the pads comprise;

a first conductive layer positioned on the substrate;

a first protective conductive layer positioned on the first conductive layer; and

a second conductive layer positioned on the first protective conductive layer.

9. The touch screen panel of claim 8, wherein:

the second conductive layer is made of any one of copper (Cu), titanium (Ti), aluminum (Al), molybdenum (MO), and a transparent conducting oxide (TCO).

10. The touch screen panel of claim 8, wherein:

the second conductive layer covers an upper surface and a side of the first conductive layer and the first protective conductive layer.

11. The touch screen panel of claim 1, further comprising:

a passivation layer formed on the substrate,

wherein the passivation layer has an opening through which the pad is exposed.

12. The touch screen panel of claim 11, wherein:

the passivation layer is made of silicon nitride (SiN_X).

13. The touch screen panel of claim 1, wherein:

the touch electrodes are disposed in a matrix and touch electrodes closer to the pads have a smaller size than touch electrodes further from the pads.

14. A method of manufacturing a touch screen panel, the method steps comprising:

disposing a first electrode, a first wiring, and a first conductive layer on a substrate in a pattern;

disposing a second electrode covering the first electrode; and

disposing a second conductive layer on the first conductive layer.

15. The manufacturing method of claim 14, wherein:

the first electrode is patterned to comprise openings.

16. The touch screen panel of claim 15, wherein:

the second electrode is patterned to cover the first electrodes and the openings of the first electrodes.

17. The manufacturing method of claim 14, wherein:

a thickness of the second electrode and the second conductive layer is less than or equal to 300 Å

.

18. The manufacturing method of claim 16, further comprising:

disposing a first protective conductive layer on the second conductive layer.

19. The manufacturing method of claim 16, further comprising:

disposing a first protective conductive layer on the first conductive layer,

wherein disposing the second conductive layer comprises disposing the second conductive layer to cover an upper surface and a side of the first conductive layer and the first protective conductive layer.