TOUCH PANEL AND THE MANUFACTURING METHOD THEREOF

• US 20110227842A1
• Filed: 03/10/2011
• Published: 09/22/2011
• Est. Priority Date: 03/16/2010
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Wu, Ming-Kung, Li, Hsiao-Ping, LIN, YI-CHUN, Huang, Ping-Wen
• Application Number:
  US13/045,105
• Publication Number:
  US 20110227842A1
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch panel structure and the manufacturing method thereof are disclosed, in which the manufacturing method includes the steps of: providing a bonding layer; and forming a conductive pattern layer on the bonding layer; wherein the conductive pattern layer is composed of at least one first and at least one second major conductors with an insulation layer interposed between the first and the second major conductors. Comparing with the prior art for manufacturing touch panels, the disclosure is advantageous in material cost, production cost, and production yield; moreover, the panel lamination process can be simplified and the touch panel structure can be joined to a planar or curvy panel and facilitate the design of a thinner product.

Claims

1. A touch panel structure comprising:

a bonding layer; and

a conductive pattern layer formed on the bonding layer and comprising at least one first major conductor, at least one second major conductor, and an insulation layer interposed between the first and second major conductors.

2. The touch panel structure of claim 1, wherein the conductive pattern layer further comprises a protective layer coated on all the first and second major conductors and the insulation layer.

3. The touch panel structure of claim 2, wherein the conductive pattern layer further comprises a protective covering film coated on the protective layer.

4. The touch panel structure of claim 1, wherein the conductive pattern layer further comprises a plurality of first conductive wires, a plurality of second conductive wires, at least one first conductive routing lead, and at least one second conductive routing lead, wherein the first conductive wires and the first conductive routing leads are used to electrically connect the first major conductors, the second conductive wires and the second conductive routing leads are used to electrically connect the second major conductors, the second conductive wires are covered with the insulation layer, and the first conductive wires overlap on the insulation layer.

5. The touch panel structure of claim 1, further comprises a first and a second bonding layers, wherein the first major conductor, at least one first conductive wire, and at least one first conductive routing lead are disposed on the first bonding layer, and the first conductive wire and the first conductive routing lead are electrically connected to the first major conductor;

the second major conductor, at least one second conductive wire, and at least one second conductive routing lead are disposed on the second bonding layer, and the second conductive wire and the second conductive routing lead are electrically connected to the second major conductor.

6. The touch panel structure of claim 1, wherein the bonding layer is formed of transparent photosensitive adhesive.

7. The touch panel structure of claim 1, further comprising a transparent conductive film joined to the reverse side of the bonding layer corresponding to the conductive pattern layer.

8. A method for manufacturing a touch panel, comprising:

providing a transparent conductive film, a bonding layer, and a temporary base film, wherein the transparent conductive film is joined to one side of the bonding layer, and the temporary base film is joined to the other side of the bonding layer;

patterning the transparent conductive film to form a conductive pattern layer;

forming a protective layer on the conductive pattern layer;

coating a protective covering film on the protective layer; and

peeling off the temporary base film to disclose the bonding layer, and sticking the bonding layer with the conductive pattern layer on a planar or curvy panel.

9. A method for manufacturing a touch panel of claim 8, wherein the patterning step comprises:

forming a plurality of first major conductors and a plurality of second major conductors;

forming a plurality of second conductive wires connected to the second major conductors;

forming an insulation layer on the second conductive wires;

forming a plurality of first conductive wires connected to the first major conductors;

forming a protective layer onto the first major conductors, the second major conductors, and the insulation layer; and

coating a protective covering film on the protective layer.

10. A method for manufacturing a touch panel of claim 9, wherein patterning the first major conductors and the second major conductors is formed by means of laser lithography or photolithography.

11. A method for manufacturing a touch panel of claim 9, wherein forming the first conductive wires and forming the second conductive wires are done by means of ink-jet printing, screen-printing, physical vapor deposition (PVD), or chemical vapor deposition (CVD).

12. A method for manufacturing a touch panel, comprising:

providing a first transparent conductive film, a first bonding layer, and a first temporary base film, wherein the first transparent conductive film is joined to one side of the first bonding layer, and the first temporary base film is joined to the other side of the first bonding layer;

patterning the first transparent conductive film to form a first conductive pattern layer;

providing a second transparent conductive film, a second bonding layer, and a second temporary base film, wherein the second transparent conductive film is joined to one side of the second bonding layer, and the second temporary base film is joined to the other side of the second bonding layer;

patterning the second transparent conductive film to form a second conductive pattern layer;

forming a protective layer on the second conductive pattern layer;

coating a protective covering film on the protective layer;

peeling off the second temporary base film to disclose the second bonding layer, and sticking the second bonding layer on the first conductive pattern layer.