Layout method and layout structure of touch panel electrode

• US 20120175150A1
• Filed: 01/10/2011
• Published: 07/12/2012
• Est. Priority Date: 01/10/2011
• Status: Active Grant

• Current Assignee: Li-Li Fan
• Original Assignee: Li-Li Fan
• Inventors: Fan, Li-Li
• Granted Patent: US 8,695,213 B2
• Time in Patent Office: Days
• US Class Current: 174/250
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.
• CPC Class Codes: Y10T 29/49126 Assembling bases
• CPC Class Codes: Y10T 29/49135 and shaping, e.g., cutting or bending, etc.
• CPC Class Codes: Y10T 29/49155 Manufacturing circuit on or in base

Abstract

A layout method of a touch panel electrode includes the steps of: providing a substrate; forming a first electro-conductive layer, having pattern blocks disposed adjacently to one another, on one side of the substrate, wherein the first electro-conductive layer is transparent; forming an alignment film on the one side of the substrate; forming an second electro-conductive layer, having wires to be connected to at least one of the pattern blocks, on the one side of the substrate; and forming a protection layer on the second electro-conductive layer to protect the second electro-conductive layer. The present invention can reduce the processes of manufacturing the conventional electrode, especially do not needs to form another electro-conductive layer and another protection layer on the other side of the substrate, and can effectively prevent the electrostatic charge effect and increase the capacitance and sensitivity.

Claims

1. A layout method of a touch panel electrode, the method comprising the steps of:

providing a substrate;

forming a first electro-conductive layer, having a plurality of pattern blocks disposed adjacently to one another, on one side of the substrate, wherein the first electro-conductive layer is transparent;

forming an alignment film on the one side of the substrate;

forming an second electro-conductive layer, having a plurality of wires connected to at least one of the pattern blocks, on the one side of the substrate; and

forming a protection layer on the second electro-conductive layer to protect the second electro-conductive layer.

2. The method according to claim 1, further comprising the step of:

forming an outer frame wire layer between the substrate and the protection layer.

3. The method according to claim 2, further comprising the step of:

forming a third electro-conductive layer on the other side of the substrate, wherein the third electro-conductive layer do not have a pattern block and shields the substrate and the third electro-conductive layer is transparent.

4. The method according to claim 1, wherein a plurality of bridge trench is formed in the alignment film and crosses between the pattern blocks, and the wires are respectively correspondingly disposed above the bridge trench.

5. The method according to claim 1, wherein the wires of the second electro-conductive layer are formed through an optically compensated mask in conjunction with at least one of over exposure and over development.

6. The method according to claim 5, wherein the step of forming the alignment film comprises:

applying a photoresist onto the substrate;

providing a mask with a pattern and exposing the pattern onto the photoresist through the mask;

developing the pattern on the photoresist to form bridge trench crossing between the pattern blocks; and

baking the photoresist.

7. The method according to claim 6, wherein the mask is a half tone pattern.

8. The method according to claim 6, wherein the step of forming the second electro-conductive layer comprises:

sputtering an electro-conductive material onto the substrate;

applying a photoresist onto the substrate;

providing the optically compensated mask and over exposing a wire pattern corresponding to the wires onto the photoresist through the optically compensated mask; and

developing the wire pattern to form the pattern blocks disposed adjacently to one another, wherein the wire pattern is formed by way of over exposure and over development.

9. The method according to claim 8, wherein the step of forming the protection layer comprises:

applying a photoresist or sputtering the photoresist or sputtering an organic material onto the substrate; and

baking the photoresist or the organic material to form a hard protection film.

10. A touch panel electrode structure, comprising:

a substrate layer;

an alignment film disposed on one side of the substrate layer;

a first electro-conductive layer disposed on one side of the alignment film, wherein the first electro-conductive layer has a plurality of pattern blocks disposed adjacently to one another and the first electro-conductive layer is transparent;

an second electro-conductive layer disposed adjacently to the other side of the alignment film; and

a protection layer disposed on the second electro-conductive layer.

11. The touch panel electrode structure according to claim 10, further comprising an outer frame wire layer disposed between the substrate layer and the protection layer.

12. The touch panel electrode structure according to claim 11, further comprising a third electro-conductive layer disposed on the other side of the substrate layer at the same time.