TOUCH SCREEN PANEL AND METHOD FOR MANUFACTURING THE SAME

• US 20140198266A1
• Filed: 01/14/2014
• Published: 07/17/2014
• Est. Priority Date: 01/16/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Hee-Woong, Jeon, Byeong-Kye
• Granted Patent: US 9,217,890 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: B82Y 15/00 Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H05K 1/0289 having a matrix lay-out, i.e. having selectively interconnectable sets of X-conductors and Y-conductors in different planes
• CPC Class Codes: H05K 1/097 Inks comprising nanoparticles and specially adapted for being sintered at low temperature H05K1/095 takes precedence
• CPC Class Codes: H05K 2201/026 Nanotubes or nanowires
• CPC Class Codes: H05K 2201/0329 Intrinsically conductive polymer [ICP]; Semiconductive polymer
• CPC Class Codes: H05K 2201/0391 Using different types of conductors
• CPC Class Codes: H05K 2201/10053 Switch
• CPC Class Codes: H05K 2201/10128 Display
• CPC Class Codes: H05K 2203/173 Adding connections between adjacent pads or conductors, e.g. for modifying or repairing
• CPC Class Codes: H05K 3/22 Secondary treatment of printed circuits H05K3/1283 takes precedence; embedding circuits in grooves by pressure H05K3/107
• CPC Class Codes: H05K 3/288 Removal of non-metallic coatings, e.g. for repairing
• CPC Class Codes: H05K 3/4685 Manufacturing of cross-over conductors
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: Y10T 29/49016 Antenna or wave energy "plumbing" making

Abstract

In an aspect, a touch screen panel including a sensing region and a peripheral region, a plurality of first sensing patterns located in the sensing region, a plurality of second sensing patterns arranged in an intersected direction with the first sensing patterns connected to each other by a connection part, an insulating layer formed on the first sensing pattern, the second sensing pattern, and the connection part, and patterned to expose both side of the first sensing pattern, at least one bridge located to intersect with the connection part on the insulating layer; and a plurality of wires located on a peripheral region and connected to the first sensing pattern and the second sensing pattern are provided.

Claims

1. A touch screen panel comprising,

a substrate having regions corresponding to a sensing region and a peripheral region;

a plurality of first sensing patterns and a plurality of second sensing patterns both including a first nanowire layer, wherein the plurality of first sensing patterns are located in the region corresponding to the sensing region of the substrate each separately arranged from each other in a direction, the plurality of second sensing patterns is arranged in an intersected direction with the first sensing pattern to be connected to each other by a connection part, and the first nanowire layers have a first density;

an insulating layer formed on the first sensing pattern, the second sensing pattern, and the connection part, in a pattern exposing both sides of the first sensing pattern;

at least one bridge disposed to be intersected with the connection part on the insulating layer and connecting to an exposed part of the first sensing pattern; and

a plurality of wires disposed on a peripheral region of the substrate and respectively connected to the first sensing pattern and the second sensing pattern and including a second nanowire layer having a second density which is higher than the first density.

2. The touch screen panel of claim 1, wherein the substrate is a flexible substrate.

3. The touch screen panel of claim 1, wherein the second nanowire layer has surface resistance lower than that of the first nanowire layers.

4. The touch screen panel of claim 3,

wherein the first nanowire layers have a surface resistance of approximately 50 Ω

/□

to 300 Ω

/□

, and the second nanowires have a surface resistance of approximately 0.1 Ω

/□

to 0.9 Ω

/□

.

5. The touch screen panel of claim 1,

wherein the second nanowire layer has permeability lower than that of the first nanowire layers.

6. The touch screen panel of claim 5,

wherein the first nanowire layers are transparent, and the second nanowire layer is opaque.

7. The touch screen panel of claim 1,

wherein the first nanowire layers include one selected from silver (Ag) nanowires, gold (Au) nanowires, platinum (Pt) nanowires, copper (Cu) nanowires, and nickel (Ni) nanowires.

8. The touch screen panel of claim 1,

wherein the first nanowire layers are located below the second nanowire layer.

9. The touch screen panel of claim 1,

wherein the bridge is one or more of metal, transparent conductive material, and conductive polymer.

10. The touch screen panel of claim 9,

wherein the bridge is one or more selected from a group of molybdenum (Mo), silver (Ag), titanium (Ti), aluminum (Al), and copper (Cu) or alloy thereof.

11. A method for manufacturing a touch screen panel comprising,

forming a first nanowire layer and a second nanowire layer, wherein the second nanowire layer has a higher density than the first nanowire layer;

forming a sensing electrode composed of the first nanowire layer in a sensing region and forming a wire from the second nanowire layer in a peripheral region by sequentially removing material from the second nanowire layer and the first nanowire layer;

exposing both sides of the sensing electrode by forming an insulating layer on the sensing electrode and the wire to form exposed sensing electrodes; and

forming a bridge on the insulating layer connecting the exposed sensing electrodes to each other.

12. The method of claim 11,

wherein the first nanowire layer is formed by mixing nanowire with solvent and then applying to have surface resistance of approximately 50 Ω

/□

to 300 Ω

/□

,

wherein the second nanowire layer is formed by mixing the nanowire with solvent and then applying to have surface resistance of approximately 0.1 Ω

/□

to 0.9 Ω

/□

.

13. The method for manufacturing a touch screen panel according to claim 11,

wherein the sensing electrode includes a plurality of first sensing patterns separated from each other in a direction and then arranged;

and a plurality of second sensing patterns arranged on in intersected direction with the first sensing patterns to be connected to each other by a connection part,

and allows adjacent both sides of the first sensing pattern to be connected to the bridge.

14. The method for manufacturing a touch screen panel according to claim 12,

wherein the nanowire is one selected from a group of including a silver (Ag) nanowire, a gold (Au) nanowire, a platinum (Pt) nanowire, a copper (Cu) nanowire, and a nickel (Ni) nanowire.

15. The method for manufacturing a touch screen panel according to claim 11,

wherein the bridge is one or more of of metal, transparent conductive material, and conductive polymer.

16. The method for manufacturing a touch screen panel according to claim 15,

wherein the metal is a metal or at least one alloy selected from a group of molybdenum (Mo), silver (Ag), titanium (Ti), aluminum (Al), and copper (Cu).

17. A method for manufacturing a touch screen panel comprising,

forming a first nanowire layer on a sensing region and forming a second nanowire layer higher than a first density on a peripheral region;

forming a sensing electrode on the first nanowire layer in the sensing region and forming a wire including the second nanowire layer on the peripheral region by sequentially patterning portions of the first and second density nanowire layers;

exposing both sides of the sensing electrode by forming an insulating layer on the sensing electrode and the wire; and

forming a bridge on the insulating layer connecting the exposed sensing electrodes to each other.

18. The method for manufacturing a touch screen panel according to claim 17,

wherein the first nanowire layer is formed by mixing nanowire with solvent and then applying to have surface resistance of approximately 50 Ω

/□

to 300 Ω

/□

wherein the second nanowire layer is formed by mixing nanowire with solvent and then applying to have surface resistance of approximately 0.1 Ω

/□

to 0.9 Ω

/□

.

19. The method for manufacturing a touch screen panel according to claim 17,

wherein the sensing electrode includes a plurality of first sensing patterns separated from each other in a direction and then arranged;

and

a plurality of second sensing patterns arranged on in intersected direction with the first sensing patterns to be connected to each other by a connection part,

and allows adjacent both sides of the first sensing pattern to be connected to the bridge.

20. The method for manufacturing a touch screen panel according to claim 18,

wherein the nanowire is one selected from a group of including a silver (Ag) nanowire, a gold (Au) nanowire, a platinum (Pt) nanowire, a copper (Cu) nanowire, and a nickel (Ni) nanowire.

21. The method for manufacturing a touch screen panel according to claim 17,

wherein the bridge is one or more of metal, transparent conductive material, and conductive polymer.

22. The method for manufacturing a touch screen panel according to claim 21,

wherein the bridge is one or more selected from a group of molybdenum (Mo), silver (Ag), titanium (Ti), aluminum (Al), and copper (Cu) or alloy thereof.