TOUCH PANEL AND REPAIRING METHOD THEREOF

• US 20120081300A1
• Filed: 12/17/2010
• Published: 04/05/2012
• Est. Priority Date: 10/04/2010
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chan, Lih-Hsiung, Tseng, Shine-Kai, Liao, Chin-Yueh, Chou, Hung-Wen
• Application Number:
  US12/970,969
• Publication Number:
  US 20120081300A1
• 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 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• 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: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A touch panel including a substrate, a plurality of first and second sensing series, and a plurality of conductive repairing pattern layers is provided. The first sensing series are disposed on the substrate and extended along a first direction. Each of the first sensing series includes a plurality of first sensing pads and first bridge lines, and the first bridge lines serially connect two adjacent first sensing pads. The second sensing series are disposed on the substrate and extended along a second direction. Each of the second sensing series includes a plurality of second sensing pads and second bridge lines, and the second bridge lines serially connect two adjacent second sensing pads. Each conductive repairing pattern layer electrically floating locates around the crossover region of the first and second sensing series. Two adjacent sensing pads are connected by the conductive repairing pattern layer after a repair procedure is finished.

Claims

1. A touch panel, comprising:

a substrate;

a plurality of first sensing series, disposed on the substrate and extended along a first direction, wherein each of the first sensing series includes a plurality of first sensing pads and a plurality of first bridge lines, and the first bridge lines serially connect two adjacent first sensing pads;

a plurality of second sensing series, disposed on the substrate and extended along a second direction, wherein each of the second sensing series includes a plurality of second sensing pads and a plurality of second bridge lines, the second bridge lines serially connect two adjacent second sensing pads, the first direction is different from the second direction, and the plurality of first sensing series and the plurality of second sensing series are electrically insulated from each other; and

a plurality of conductive repairing pattern layers, wherein each of the conductive repairing pattern layers is overlapped with two adjacent first sensing pads in the same first sensing series, and the conductive repairing pattern layers are electrically floating.

2. The touch panel as claimed in claim 1, further comprising a first dielectric layer, disposed on the substrate to cover the conductive repairing pattern layers, wherein the first dielectric layer includes a plurality of contact windows, and the first sensing pads and the second sensing pads are disposed on the first dielectric layer.

3. The touch panel as claimed in claim 2, wherein the first dielectric layer further covers the first bridge lines, the first sensing pads connect to the first bridge lines through the contact windows, and the second bridge lines are disposed on the first dielectric layer.

4. The touch panel as claimed in claim 2, wherein the first dielectric layer further covers the second bridge lines, the second sensing pads connect to the second bridge lines through the contact windows, and the first bridge lines are disposed on the first dielectric layer.

5. The touch panel as claimed in claim 2, further comprising a second dielectric layer, disposed on the first dielectric layer to cover the first sensing series and the second sensing series.

6. The touch panel as claimed in claim 1, further comprising a first dielectric layer, disposed on the substrate to cover the first sensing pads and the second sensing pads, wherein the first dielectric layer includes a plurality of contact windows, and the conductive repairing pattern layers are disposed on the first dielectric layer.

7. The touch panel as claimed in claim 6, wherein the first dielectric layer further covers the first bridge lines, the second bridge lines are disposed on the first dielectric layer, and the second sensing pads connect to the second bridge lines through the contact windows.

8. The touch panel as claimed in claim 6, wherein the first dielectric layer further covers the second bridge lines, the first bridge lines are disposed on the first dielectric layer, and the first sensing pads connect to the first bridge lines through the contact windows.

9. The touch panel as claimed in claim 1, wherein a material of the conductive repairing pattern layers comprises a transparent conductive material.

10. The touch panel as claimed in claim 1, wherein a material of the conductive repairing pattern layers comprises a metallic conductive material.

11. The touch panel as claimed in claim 1, wherein the first bridge lines and the conductive repairing pattern layers are made up of the same layer.

12. The touch panel as claimed in claim 1, wherein the second bridge lines and the conductive repairing pattern layers are made up of the same layer.

13. The touch panel as claimed in claim 1, wherein a material of the first sensing pads, a material of the first bridge lines and a material of the second sensing pads are the same.

14. The touch panel as claimed in claim 1, wherein each of the conductive repairing pattern layers comprises a mesh repairing pattern layer, the mesh repairing pattern layer is overlapped with the corresponding two adjacent first sensing pads, and is overlapped with the corresponding two adjacent second sensing pads.

15. The touch panel as claimed in claim 1, wherein each of the conductive repairing pattern layers comprises a plurality of first repairing lines electrically connected, and each of the first repairing lines is overlapped with the corresponding two adjacent first sensing pads.

16. The touch panel as claimed in claim 1, wherein each of the conductive repairing pattern layers is further overlapped with two adjacent second sensing pads in the same second sensing series.

17. The touch panel as claimed in claim 16, wherein each of the conductive repairing pattern layers comprises a plurality of first repairing lines electrically connected and a plurality of second repairing lines electrically connected, each of the first repairing lines is overlapped with the corresponding two adjacent first sensing pads, each of the second repairing lines is overlapped with the corresponding two adjacent second sensing pads, and the first repairing lines are electrically connected to the second repairing lines.

18. The touch panel as claimed in claim 1, further comprising a plurality of dummy electrodes, disposed between the first sensing pads and the second sensing pads.

19. The touch panel as claimed in claim 1, further comprising a plurality of peripheral connecting lines, electrically connected to corresponding first sensing series and corresponding second sensing series respectively.

20. A repairing method for repairing a touch panel, suitable to repair the touch panel as claimed in claim 1 when a short defect or an open defect occurs in a crossover region of a first bridge line and a second bridge line of the touch panel, the repairing method comprising:

cutting the first bridge line with the defect, therefore two adjacent first sensing pads originally connected through the first bridge line to be electrically insulated; and

electrically connecting the two adjacent first sensing pads electrically insulated through a conductive repairing pattern layer overlapped with the two adjacent first sensing pads.

21. The touch panel repair method as claimed in claim 20, wherein a method of cutting the first bridge line with the defect includes a laser cutting process.

22. The touch panel repair method as claimed in claim 20, wherein a method of electrically connecting the two adjacent first sensing pads electrically insulated through the conductive repairing pattern layer overlapped with the two adjacent first sensing pads includes welding the conductive repairing pattern layer with the two adjacent first sensing pads.

23. The touch panel repair method as claimed in claim 22, wherein a method of welding includes a laser welding process.

24. A touch panel, comprising:

a substrate;

a plurality of first bridge lines, disposed on the substrate, and extended along a first direction;

a plurality of conductive repairing pattern layers, disposed on the substrate, wherein the conductive repairing pattern layers are electrically floating;

a first dielectric layer, disposed on the substrate to cover the conductive repairing pattern layers and the first bridge lines, wherein the first dielectric layer includes a plurality of contact windows, and each of the first bridge lines corresponds to two or more contact windows;

a plurality of first sensing pads, disposed on the first dielectric layer, wherein the first bridge lines serially connect the two adjacent first sensing pads through the contact windows, and the first sensing pads and the first bridge lines form a plurality of first sensing series arranged in parallel; and

a plurality of second sensing series, arranged in parallel and disposed on the dielectric layer, and extended along a second direction, wherein each of the second sensing series includes a plurality of second sensing pads and a plurality of second bridge lines, the second bridge lines serially connect two adjacent second sensing pads, and the first direction is different from the second direction, wherein the first sensing series and the second sensing series are electrically insulated from each other,

wherein each of the conductive repairing pattern layers is overlapped with the corresponding two adjacent first sensing pads, and is overlapped with the corresponding two adjacent second sensing pads.

25. A touch panel, comprising:

a substrate;

a plurality of first sensing pads, disposed on the substrate and extended along a first direction;

a plurality of second sensing series, arranged in parallel and disposed on the substrate, and extended along a second direction, wherein each of the second sensing series includes a plurality of second sensing pads and a plurality of second bridge lines, the second bridge lines serially connect two adjacent second sensing pads, the first direction is different from the second direction, and the first sensing pads and the second sensing series are electrically insulated from each other;

a first dielectric layer, disposed on the substrate to cover the first sensing pads and the second sensing series, wherein the first dielectric layer includes a plurality of contact windows, and each of the first sensing pads corresponds to two contact windows;

a plurality of first bridge lines, disposed on the first dielectric layer along a first direction, wherein the first bridge lines serially connect the two adjacent first sensing pads through the contact windows to form a plurality of first sensing series arranged in parallel; and

a plurality of conductive repairing patterns, disposed on the first dielectric layer, wherein the conductive repairing patterns are electrically floating, each of the conductive repairing pattern layers is overlapped with the corresponding two adjacent first sensing pads, and is overlapped with the corresponding two adjacent second sensing pads.