TRANSPARENT CONDUCTIVE STRUCTURE APPLIED TO A TOUCH PANEL AND METHOD OF MAKING THE SAME

• US 20120279759A1
• Filed: 05/03/2011
• Published: 11/08/2012
• Est. Priority Date: 05/03/2011
• Status: Active Grant

• Current Assignee: Innovation & Infinity Global Corp.
• Original Assignee: Innovation & Infinity Global Corp.
• Inventors: CHU, CHAO-CHIEH
• Granted Patent: US 8,629,944 B2
• Time in Patent Office: Days
• US Class Current: 174/251
• 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

Abstract

A transparent conductive structure applied to a touch panel includes a substrate unit, a first coating unit, a transparent conductive unit, and a second coating unit. The substrate unit includes a transparent substrate. The first coating unit includes a first coating layer formed on the top surface of the transparent substrate. The transparent conductive unit includes a transparent conductive layer formed on the top surface of the first coating layer. The transparent conductive layer includes a plurality of conductive circuits arranged to form a predetermined circuit pattern. The second coating unit includes a second coating layer formed on the top surface of the transparent conductive layer. The second coating layer has a touching surface formed on the top side thereof for an external object to touch. The second coating layer is substantially formed by mixing silicon oxide, aluminum oxide, lithium oxide and Teflon.

Claims

1. A transparent conductive structure applied to a touch panel, comprising:

a substrate unit including at least one transparent substrate;

a first coating unit including at least one first coating layer formed on the top surface of the at least one transparent substrate;

a transparent conductive unit including at least one transparent conductive layer formed on the top surface of the at least one first coating layer, wherein the at least one transparent conductive layer includes a plurality of conductive circuits, and the conductive circuits are arranged to form a predetermined circuit pattern; and

a second coating unit including at least one second coating layer formed on the top surface of the at least one transparent conductive layer, wherein the at least one second coating layer has a touching surface formed on the top side thereof, the touching surface allows an external object to touch, and the at least one second coating layer is substantially formed by mixing silicon oxide, aluminum oxide, lithium oxide and Teflon.

2. The transparent conductive structure of claim 1, wherein the at least one transparent substrate is polyethylene terephthalate (PET), poly carbonate (PC), polyethylene (PE), poly vinyl chloride (PVC), poly propylene (PP), poly styrene (PS), or polymethylmethacrylate (PMMA), and the thickness of the at least one transparent substrate is between 50 μ

m and 125 μ

m.

3. The transparent conductive structure of claim 1, wherein the at least one first coating layer is a hard coating layer, the hard coating layer is an ultraviolet hardening layer, wherein each conductive circuit is a silver circuit, an aluminum circuit, or a copper circuit, and the conductive range of the predetermined circuit pattern is between 0.8 and 3 ohm/square, wherein the at least one second coating layer is a hard protection layer.

4. The transparent conductive structure of claim 1, wherein the conductive circuits are divided into a plurality of X-axis tracks extended along a transverse direction and a plurality of Y-axis tracks extended along a lengthwise direction and respectively insulated from and vertical to the X-axis tracks, the thickness of each conductive circuit is between 3000 Å

and 5000 Å

, the width of each X-axis track is between 3000 Å and

5000 Å

, the distance between every two X-axis track is between 10 μ

m and 20 μ

m, the width of each Y-axis track is between 1000 Å and

2000 Å

, and the distance between every two Y-axis track is between 5 μ

m and 15 μ

m.

5. The transparent conductive structure of claim 1, wherein the conductive circuits are formed on the top surface of the at least one transparent conductive layer, and the conductive circuits are covered by the at least one second coating layer.

6. The transparent conductive structure of claim 1, wherein the conductive circuits are embedded into the at least one transparent conductive layer, and the conductive circuits are covered by the at least one second coating layer.

7. The transparent conductive structure of claim 1, wherein the conductive circuits are formed on the bottom surface of the at least one transparent conductive layer and embedded into the at least one first coating layer.

8. The transparent conductive structure of claim 1, wherein the at least one transparent conductive layer includes at least two transparent conductive films stacked on top of each other, and the conductive circuits are formed between the at least two transparent conductive films.

9. The transparent conductive structure of claim 8, wherein the conductive circuits are simultaneously embedded into one of the at least two transparent conductive films to contact the other transparent conductive film.

10. A method of making a transparent conductive structure applied to a touch panel, comprising the steps of

providing a substrate unit including at least one transparent substrate;

forming at least one first coating layer on the top surface of the at least one transparent substrate;

forming at least one transparent conductive layer on the top surface of the at least one first coating layer, wherein the at least one transparent conductive layer includes a plurality of conductive circuits, and the conductive circuits are arranged to form a predetermined circuit pattern; and

forming at least one second coating layer on the top surface of the at least one transparent conductive layer, wherein the at least one second coating layer has a touching surface formed on the top side thereof, the touching surface allows an external object to touch, and the at least one second coating layer is substantially formed by mixing silicon oxide, aluminum oxide, lithium oxide and Teflon.