ELECTROSTATIC CAPACITY TYPE TOUCH SCREEN PANEL AND METHOD OF MANUFACTURING THE SAME

• US 20110193801A1
• Filed: 12/03/2010
• Published: 08/11/2011
• Est. Priority Date: 02/11/2010
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: An, Suchang, Kang, Heekwang, Hwang, Sangsoo, Jung, Gangseob
• Granted Patent: US 8,780,061 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 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 Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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
• 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: Y10T 29/49105 Switch making

Abstract

A touch screen panel includes a substrate having an electrode forming part, and a routing wire forming part, where the routing wire forming part is located at an area outside the electrode forming part. A plurality of first electrode connection patterns is located in the electrode forming part. A plurality of first routing wires and a plurality of second routing wires are both located in the routing wire forming part, and the routing wires are disposed on the same layer with the first electrode connection patterns. An insulation layer is formed on the substrate and over the first electrode connection patterns. The insulation layer has at least two contact holes that expose contact portions of each the plurality of first electrode connection patterns. A plurality of first serial electrodes are arranged in parallel in a first direction and are connected with the plurality of first routing wires, respectively. Each first serial electrode includes a plurality of first electrode elements. A plurality of second serial electrodes are arranged in parallel in a second direction, and are configured to intersect the first serial electrodes. The second serial electrodes are connected with the plurality of second routing wires, respectively, and each second serial electrode includes a plurality of second electrode elements. Each of the plurality of first electrode connection patterns connects adjacent electrode elements of each first serial electrode through respective contact portions accessible through the at least two contact holes.

Claims

1. A touch screen panel, comprising:

a substrate including an electrode forming part, and a routing wire forming part, the routing wire forming part located at an area outside the electrode forming part;

a plurality of first electrode connection patterns in the electrode forming part;

a plurality of first routing wires and a plurality of second routing wires, both in the routing wire forming part, the routing wires disposed on the same layer with the first electrode connection patterns;

an insulation layer formed on the substrate and over the first electrode connection patterns, the insulation layer having at least two contact holes that expose contact portions of each the plurality of first electrode connection patterns;

a plurality of first serial electrodes arranged in parallel in a first direction and connected with the plurality of first routing wires, respectively;

each first serial electrode comprising a plurality of first electrode elements;

a plurality of second serial electrodes arranged in parallel in a second direction, and configured to intersect the first serial electrodes;

the second serial electrodes connected with the plurality of second routing wires, respectively;

each second serial electrode comprising a plurality of second electrode elements; and

wherein each of the plurality of first electrode connection patterns connects adjacent electrode elements of each first serial electrode through respective contact portions accessible through the at least two contact holes.

2. The touch screen panel of claim 1, wherein the plurality of first connection patterns and the pluralities of first and second routing wires are formed of one of Al, AlNd, Cu, CuOx, Ag, Mo, MoTi and Cr.

3. The touch screen panel of claim 1, wherein the insulation layer includes silicon nitride, and has a thickness of about 5,000 Å

to about 10,000 Å

.

4. The touch screen panel of claim 1, wherein the plurality of first electrode serials and the plurality of second electrode serials include a transparent conductive material.

5. The touch screen panel of claim 1, wherein each of the plurality of first connection patterns has a thickness of about 2000 Å

to about 3000 Å

, and a width of about 3 μ

m to about 10 μ

m.

6. The touch screen panel of claim 1, wherein each of the pluralities of first and second electrode elements have a thicknesses of about 1200 Å

to about 1600 Å

.

7. The touch screen panel of claim 1, wherein a hollow is formed by a portion of the plurality of first electrode elements being partially filled in the plurality of contact holes.

8. A method of forming a touch screen panel, comprising the steps of:

forming a first conductive patterns including a plurality of first routing wires and a plurality of second routing wires on the same layer with a plurality of first electrode connection patterns;

forming an insulating layer on a substrate and on the first electrode connection patterns, the insulating layer having at least two contact holes to expose contact portions of the first electrode connection patterns;

forming a second conductive patterns including a plurality of first and second serial electrodes, and electrically coupling respective first serial electrodes with corresponding first routing wires and electrically coupling respective second serial electrodes with corresponding second routing wires, wherein the second serial electrodes intersect the first serial electrodes without electrical coupling; and

wherein each first serial electrode comprises a plurality of first electrode elements electrically connected to each other through respective contact portions through the at least two contact holes.

9. The method o f claim 8, wherein the forming first conductive patterns includes depositing a first conductive layer on the substrate by a deposition process and forming the plurality of first connection patterns, the plurality of first routing wires, and the plurality of second routing wires by patterning the first conductive layer with a photolithography process and an etching process using a first mask;

the forming the insulating layer includes forming the insulation layer through a deposition process and forming the plurality of contact holes to expose the contact portions of the first connection patterns with a photolithography process and an etching process using a second mask; and

the forming the second conductive patterns includes depositing a second conductive layer through a deposition process on the insulation layer in which the plurality of contact holes are formed, and forming the plurality of first electrode serials and the plurality of second electrode serials by patterning the second conductive layer with a photolithography process and an etching process using a third mask.

10. A touch screen panel, comprising:

a substrate including an electrode forming part, and a routing wire forming part, the routing wire forming part located at an area outside the electrode forming part;

a plurality of first electrode connection patterns on the substrate and separate from each other;

a plurality of first routing wires and a plurality of second routing wires, both in the routing wire forming part;

a plurality of first serial electrodes arranged in parallel in a first direction, each first serial electrode comprising a plurality of first electrode elements separate from each other;

the first electrode connection pattern connecting adjacent electrode elements of each first serial electrode, respectively;

an insulation layer formed on a portion of the substrate and over the first electrode connection patterns;

a plurality of second serial electrodes arranged in parallel in a second direction, and configured to intersect the first serial electrodes, each second serial electrode comprising a plurality of second electrode elements; and

the first serial electrodes connected with the plurality of first routing wires, respectively, and the second serial electrodes connected with the plurality of second routing wires, respectively.

11. The touch screen panel of claim 10, wherein the insulation layer comprises a first insulation patterns formed to expose a first portion and a second portion of the first connection pattern and a second insulation pattern formed to expose a portion of the first routing wire and a portion of the second routing wire.

12. The touch screen panel of claim 11, wherein the first electrode element is overlapped with at least one of the first portion of the first connection pattern, and a side wall and an upper surface of the first insulation pattern.

13. The touch screen panel of claim 10, wherein the first connection pattern and the first and second electrode elements includes one of Al, AlNd, Cu, CuOx, Ag, Mo, MoTi and Cr.

14. The touch screen panel of claim 10, wherein the first connection pattern includes a transparent conductive material, and the first and second electrode elements comprises a lower layer including one of Al, AlNd, Cu, CuOx, Ag, Mo, MoTi and Cr and an upper layer including a transparent conductive material.

15. The touch screen panel of claim 10, wherein the first connection pattern includes a lower layer including one of Al, AlNd, Cu, CuOx, Ag, Mo, MoTi and Cr and an upper layer including a transparent conductive material, and the first and second electrode elements comprises a lower layer including one of Al, AlNd, Cu, CuOx, Ag, Mo, MoTi and Cr and an upper layer including a transparent conductive material.

16. The touch screen panel of claim 10, wherein the insulation layer includes silicon nitride, and has a thickness of about 5,000 Å

to about 10,000 Å

.

17. The touch screen panel of claim 10, wherein the first connection patterns has a thickness of about 2000 Å

to about 3000 Å

, and a width of about 3 μ

m to about 10 μ

m.

18. The touch screen panel of claim 10, wherein each of the pluralities of first and second electrode elements have a thicknesses of about 1200 Å

to about 1600 Å

.

19. A method of forming touch screen panel, comprising:

forming a first conductive pattern including a plurality of first electrode connection patterns and a plurality of first and second routing wires on a substrate, wherein the first electrode connection patterns are separate from each other, and the first electrode connection patterns are located on an electrode forming part, and first and second routing wires are located on an area outside of the electrode forming part;

forming an insulation layer on a portion of the substrate and over the first electrode connection patterns;

forming a second conductive pattern including a plurality of first serial electrodes and second serial electrodes, the first serial electrodes formed in parallel in a first direction and the plurality of second serial electrodes formed in parallel in a second direction;

each first serial electrode comprising a plurality of first electrode elements separate from each other, wherein the first electrode connection pattern connects adjacent electrode elements of each first serial electrode;

each second serial electrode comprising a plurality of second electrode elements and a second electrode connection pattern connecting adjacent electrode elements of each second serial electrode, respectively; and

wherein the first serial electrodes intersect the second serial electrodes.

20. The method of claim 19, wherein the forming a first conductive pattern includes:

forming lower layers of the first and second routing wires in a routing wire forming part of the substrate; and

forming the first connection patterns in the electrode forming part of the substrate, and at the same time forming upper layers on the lower layers of the first and second routing wires, respectively, wherein the routing wire forming part is formed on the substrate at positions outside the electrode forming part.

21. The method of claim 19, wherein the forming a first conductive pattern includes:

sequentially forming a first conductive layer and a second conductive layer on the substrate; and

forming the plurality of first and second routing wires having multiple layers in the routing wire forming part and the plurality of first connection patterns in the electrode forming part by simultaneously patterning the first and second conductive layers.