Light transmission touch panel and manufacturing method thereof

• US 20070242054A1
• Filed: 04/12/2007
• Published: 10/18/2007
• Est. Priority Date: 04/14/2006
• Status: Abandoned Application

• Current Assignee: RitFast Corporation
• Original Assignee: RITDISPLAY CORPORATION
• Inventors: Chang, Yih, Chen, Ching-Lung, Tang, Tung-Yang, Kuo, Chun-Chieh, Lai, Yuang-Wei
• Application Number:
  US11/783,838
• Publication Number:
  US 20070242054A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 3/0445 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

Abstract

A light transmission touch panel comprises a transparent substrate, a first transparent conductive layer, an insulation layer and a second transparent conductive layer, wherein the first transparent conductive layer, the insulation layer and the second transparent conductive layer are patterned and overlaid on a surface of the substrate. The first transparent conductive layer and the second transparent conductive layer are either on a surface or respectively on two opposite surfaces of the insulation layer. An electrical field having a component along the surface of the substrate occurs between two adjacent portions of the first transparent conductive layer and the second transparent conductive layer once they are electrically charged. When an article touches the touch panel, the intensity of the electrical lines is accordingly changed so that the touch panel can detect where the touch position is.

Claims

1. A light transmission touch panel, comprising:

a transparent substrate;

a first transparent conductive layer patterned and overlaid on a surface of the transparent substrate;

an insulation layer overlaid on the first transparent conductive layer and the transparent substrate; and

a second transparent conductive layer patterned and disposed on the insulation layer.

2. The light transmission touch panel of claim 1, wherein the first transparent conductive layer and the second transparent conductive layer are respectively disposed on opposite surfaces of the insulation layer.

3. The light transmission touch panel of claim 2, wherein the first transparent conductive layer includes a plurality of first electrode plates and a plurality of first wires connecting the first electrode plates aligned in a longitudinal line.

4. The light transmission touch panel of claim 3, wherein the second transparent conductive layer includes a plurality of second electrode plates and a plurality of second wires connecting the second electrode plates aligned in a transverse line.

5. The light transmission touch panel of claim 4, wherein a lateral electrical field occurs between the first electrode plates and second electrode plates adjacent to each other when the first electrode plates and second electrode plates are electrically charged and a component of the electrical field is parallel to the surface of the transparent substrate.

6. The light transmission touch panel of claim 1, wherein the first transparent conductive layer and the second transparent conductive layer are disposed on the same surface of the insulation layer.

7. The light transmission touch panel of claim 6, wherein the first transparent conductive layer includes a plurality of first electrode plates and a plurality of first wires connecting the first electrode plates aligned in a longitudinal line.

8. The light transmission touch panel of claim 7, wherein the second transparent conductive layer includes a plurality of second electrode plates.

9. The light transmission touch panel of claim 8, further comprising a plurality of through holes provided on the insulation layer and a plurality of vertical conductive cylinders filled in the through holes, wherein a first end of the vertical conductive cylinder is connected to one of the second electrode plates.

10. The light transmission touch panel of claim 9, further comprising a plurality of conductive wires disposed on the surface of the insulation surface opposite to the second transparent conductive layer, wherein each of the conductive wires is connected to a second end of at least one of the vertical conductive cylinders.

11. The light transmission touch panel of claim 8, wherein a lateral electrical field occurs between the first electrode plates and second electrode plates adjacent to each other when the first electrode plates and second electrode plates are electrically charged and a component of the electrical field is parallel to the surface of the transparent substrate.

12. The light transmission touch panel of claim 1, wherein the transparent substrate is glass or a transparent polymer.

13. The light transmission touch panel of claim 1, wherein each of the first transparent conductive layer and the second transparent conductive layer includes an indium-tin oxide (ITO), aluminum-zinc oxide (AZO) or indium-zinc oxide (IZO).

14. The light transmission touch panel of claim 9, wherein the insulation layer is a polymer material.

15. A method for manufacturing a light transmission touch panel, comprising the steps of:

providing a transparent substrate;

patterning a first transparent conductive layer overlaid on the transparent substrate by a first photolithography process;

overlaying an insulation layer on the first transparent conductive layer and the transparent substrate; and

patterning a second transparent conductive layer overlaid on the insulation layer by a second photolithography process.

16. The method for manufacturing the light transmission touch panel of claim 15, wherein the transparent substrate is glass or a transparent polymer.

17. The method for manufacturing the light transmission touch panel of claim 15, wherein each of the first transparent conductive layer and the second transparent conductive layer includes an indium-tin oxide, aluminum-zinc oxide or indium-zinc oxide.

18. The method for manufacturing the light transmission touch panel of claim 15, wherein the insulation layer is a polymer material.

19. The method for manufacturing the light transmission touch panel of claim 15, wherein the first photolithography process and the second photolithography process include a step of sputtering, coating, exposure, soft baking, hard baking and development.

20. A method for manufacturing a light transmission touch panel, comprising the steps of:

providing a transparent substrate;

patterning a first transparent conductive layer and a second transparent conductive layer overlaid on the transparent substrate by a first photolithography process;

overlaying an insulation layer on the first transparent conductive layer, the second transparent conductive layer and the transparent substrate;

forming a plurality of vertical conductive cylinders through the insulation layer, wherein a first end of the vertical conductive cylinder is connected to the second transparent conductive layer; and

disposing a plurality of conductive wires on a surface of the insulation surface opposite to the second transparent conductive layer, wherein each of the conductive wires is connected to a second end of the vertical conductive cylinder.

21. The method for manufacturing the light transmission touch panel of claim 20, wherein the transparent substrate is glass or a transparent polymer.

22. The method for manufacturing the light transmission touch panel of claim 20, wherein each of the first transparent conductive layer and the second transparent conductive layer includes an indium-tin oxide, aluminum-zinc oxide or indium-zinc oxide.

23. The method for manufacturing the light transmission touch panel of claim 20, wherein the insulation layer is a polymer material.

24. The method for manufacturing the light transmission touch panel of claim 20, wherein the first photolithography process and the second photolithography process includes a step of sputtering, coating, exposure, soft baking, hard baking and development.