TOUCH PANEL AND MANUFACTURING METHOD THEREOF

• US 20140211109A1
• Filed: 03/28/2014
• Published: 07/31/2014
• Est. Priority Date: 09/29/2007
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wu, Yuan-Chun, Lee, Hsin-Hung, Ma, Mei-Sheng, Yang, Tun-Chun, Lee, Seok-Lyul, Hsieh, Yao-Jen
• Application Number:
  US14/228,262
• Publication Number:
  US 20140211109A1
• Time in Patent Office: Days
• US Class Current: 349/12
• 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A touch panel and a manufacturing method thereof are provided. The touch panel has a double-layered sensing pad structure or a single-layered sensing pad structure. In the double-layered sensing pad structure, the sensing pads in each layer have corresponding dummy sensing pads in the other layer for compensating the difference of transmittance. In the single-layered sensing pad structure, the sensing pads are coplanar so that the problem of color shift can be overcome and the visual effect of the touch panel can be improved.

Claims

1. A touch panel, comprising:

a substrate;

a plurality of first sensing serials, disposed on the substrate and extended along a first direction, wherein each of the first sensing serials comprises;

a plurality of first sensing pads; and

a plurality of first bridging lines, wherein each of the first bridging lines connects adjacent two first sensing pads in series;

a plurality of second sensing serials, disposed on the substrate and extended along a second direction, wherein the first direction intersects the second direction, and each of the second sensing serials comprises;

a plurality of second sensing pads, being substantially coplanar to the first sensing pads with a plurality of gaps between the first sensing pads and the second sensing pads, wherein each of the first sensing pads and the second sensing pads is in rectangular shape; and

a plurality of second bridging lines, wherein each of the second bridging lines connects adjacent two second sensing pads in series;

a first dielectric layer, at least disposed between one of the first bridge lines and one of the second bridge lines intersecting to each other; and

a plurality of dummy patterns, disposed on the substrate, each of the dummy patterns being located between the first sensing pads and the second sensing pads, wherein all of the dummy patterns, the first sensing pads and the second sensing pads are made of a same single layer, all of the dummy patterns, the first sensing pads and the second sensing pads are made of a transmissive conductive material layer, all of the dummy patterns, the first sensing pads and the second sensing pads are substantially coplanar, and all of the dummy patterns, the first sensing pads and the second sensing pads are substantially not overlapped with each other, and wherein each of the gaps between the first sensing pad and the second pad is disposed with at least one dummy pattern, and the dummy pattern is configured along the corresponding sides of the first sensing pad and the second pad.

2. The touch panel according to claim 1, wherein the first dielectric layer covers the first sensing serials and the second sensing pads, the first dielectric layer has a plurality of via holes therein, and the second bridging lines are located on the first dielectric layer and connected to the corresponding second sensing pads through the corresponding via holes.

3. The touch panel according to claim 2, further comprising a second dielectric layer covering the first dielectric layer, the first sensing serials and the second sensing serials.

4. The touch panel according to claim 1, wherein the first dielectric layer covers the first sensing serial, the first dielectric layer has a plurality of openings therein, the second sensing pads are located in the corresponding openings, and each of the second bridging lines spans over the first dielectric layer between adjacent two openings to connect the corresponding adjacent two second sensing pads.

5. The touch panel according to claim 4, further comprising a second dielectric layer covering the first dielectric layer, the first sensing serials and the second sensing serials.

6. The touch panel according to claim 1, wherein the first dielectric layer covers the first bridging lines, the first dielectric layer has a plurality of via holes therein, and the first sensing pads and the second sensing serials are located on the first dielectric layer and connected to the corresponding first bridging lines through the corresponding via holes.

7. The touch panel according to claim 6 further comprising a second dielectric layer covering the first dielectric layer, the first sensing serials and the second sensing serials.

8. The touch panel according to claim 1, wherein each of the first sensing pads and each of the second sensing pads respectively have at least one opening.

9. The touch panel according to claim 8, wherein the at least one opening of the first sensing pad or the second sensing pad comprises a trellis pattern or a plurality of strip patterns.

10. The touch panel according to claim 1, wherein all of the dummy patterns, the first sensing pads and the second sensing pads are substantially disposed on the same plane.

11. A touch panel, comprising:

a substrate;

a plurality of first sensing serials, disposed on the substrate and extended along a first direction, wherein each of the first sensing serials comprises;

a plurality of first sensing pads; and

a plurality of first bridging lines, wherein each of the first bridging lines connects adjacent two first sensing pads in series;

a plurality of second sensing serials, disposed on the substrate and extended along a second direction, wherein the first direction intersects the second direction, and each of the second sensing serials comprises;

a plurality of second sensing pads, being substantially coplanar to the first sensing pads with a plurality of gaps between the first sensing pads and the second sensing pads, wherein each of the first sensing pads and the second sensing pads is in polygonal shape; and

a plurality of second bridging lines, wherein each of the second bridging lines connects adjacent two second sensing pads in series;

a first dielectric layer, at least disposed between one of the first bridge lines and one of the second bridge lines intersecting to each other; and

a plurality of dummy patterns, disposed on the substrate, each of the dummy patterns being located between the first sensing pads and the second sensing pads, wherein all of the dummy patterns, the first sensing pads and the second sensing pads are made of a same single layer, all of the dummy patterns, the first sensing pads and the second sensing pads are made of a transmissive conductive material layer, all of the dummy patterns, the first sensing pads and the second sensing pads are substantially coplanar, and all of the dummy patterns, the first sensing pads and the second sensing pads are substantially not overlapped with each other, and wherein each of the gaps between the first sensing pad and the second pad is disposed with at least one dummy pattern, and the dummy pattern is configured along the corresponding sides of the first sensing pad and the second pad.

12. The touch panel according to claim 11, wherein the first dielectric layer covers the first sensing serials and the second sensing pads, the first dielectric layer has a plurality of via holes therein, and the second bridging lines are located on the first dielectric layer and connected to the corresponding second sensing pads through the corresponding via holes.

13. The touch panel according to claim 12, further comprising a second dielectric layer covering the first dielectric layer, the first sensing serials and the second sensing serials.

14. The touch panel according to claim 11, wherein the first dielectric layer covers the first sensing serial, the first dielectric layer has a plurality of openings therein, the second sensing pads are located in the corresponding openings, and each of the second bridging lines spans over the first dielectric layer between adjacent two openings to connect the corresponding adjacent two second sensing pads.

15. The touch panel according to claim 14, further comprising a second dielectric layer covering the first dielectric layer, the first sensing serials and the second sensing serials.

16. The touch panel according to claim 11, wherein the first dielectric layer covers the first bridging lines, the first dielectric layer has a plurality of via holes therein, and the first sensing pads and the second sensing serials are located on the first dielectric layer and connected to the corresponding first bridging lines through the corresponding via holes.

17. The touch panel according to claim 16 further comprising a second dielectric layer covering the first dielectric layer, the first sensing serials and the second sensing serials.

18. The touch panel according to claim 11, wherein each of the first sensing pads and each of the second sensing pads respectively have at least one opening.

19. The touch panel according to claim 18, wherein the at least one opening of the first sensing pad or the second sensing pad comprises a trellis pattern or a plurality of strip patterns.

20. The touch panel according to claim 11, wherein all of the dummy patterns, the first sensing pads and the second sensing pads are substantially disposed on the same plane.