TOUCH PANEL AND MANUFACTURING METHOD THEREOF

• US 20150338959A1
• Filed: 06/03/2015
• Published: 11/26/2015
• Est. Priority Date: 08/17/2011
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Xie, Yanjun, Ho, Kwan-Sin
• Granted Patent: US 9,619,093 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/0443 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

The present disclosure provides a manufacturing method for a touch panel comprising: disposing an electrode layer extending from touch area of a substrate to periphery area of the substrate, wherein the periphery area surrounds the periphery of the touch area. The method further includes disposing an insulation layer in the periphery area of the substrate to form a shielding layer, making the shielding layer cover the overlapping electrode in the periphery area and making the electrode layer of the touch area and the overlapping electrode locate on the same layer of the substrate so as to avoid fluctuation of resistance value in the electrode layer due to height difference. Meanwhile, adopting the disposition method also maintains insulating performance of the shielding layer. The present disclosure also provides a touch panel made by the manufacturing method.

Claims

1. A touch panel, comprising:

an overlapping electrode formed by disposing an electrode layer extending from touch area of a substrate to periphery area of the substrate, wherein electrical signals of the touch area are transmitted to an external control circuit through the overlapping electrode, further Wherein the periphery area surrounds periphery of the touch area; and

a shielding layer formed by disposing an insulation layer in the periphery area of the substrate and covering the overlapping electrode in the periphery area.

2. The touch panel as claimed in claim 1, further comprising a circuit layer, wherein the circuit layer forms a plurality of main conducting, wires on the shielding layer, wherein the shielding layer has a wiring hole through the shielding layer on the overlapping electrode, further wherein the overlapping electrode is electrically connected to the main conducting wire via the wiring hole.

3. The touch panel as claimed in claim 1, further comprising a sensing electrode disposed in the touch area and formed by disposing the electrode layer, wherein the sensing electrode comprises:

a plurality of serially-connected electrodes disposed along a first polar axis direction;

a connection line disposed between the serially-connected electrodes and electrically connected to the serially-connected electrodes; and

a plurality of independent electrodes, mutually insulated and disposed at both sides of the connection line with intervals along a second polar axis direction.

4. The touch panel as claimed in claim 3, wherein the overlapping electrode comprises:

a first overlapping electrode formed by extending from the independent electrode to the periphery area; and

a second overlapping electrode formed by extending from the serially-connected electrode to the periphery area.

5. The touch panel as claimed in claim 4, wherein the shielding layer has a wiring hole through the shielding layer respectively on the first overlapping electrode and the second overlapping electrode.

6. The touch panel as claimed in claim 5, further comprising an insulation bridge formed by disposing the insulation layer, wherein the insulation bridge is disposed on the connection line of the sensing electrode.

7. The touch panel as claimed in claim 6, further comprising:

a main conducting wire disposed on the shielding layer of the periphery area and formed by a circuit layer; and

a bridge wire disposed on the insulation bridge of the touch area and formed by the circuit layer.

8. The touch panel as claimed in claim 7, wherein the bridge wire is electrically connected to the independent electrodes at both sides of the connection line and the main conducting wire comprises a first conducting wire and a second conducting wire, wherein the first conducting wire is electrically connected to the independent electrodes via the wiring hole on the first overlapping electrode, further wherein the second conducting wire is electrically connected to the serially-connected electrodes via the wiring hole on the second overlapping electrode.

9. The touch panel as claimed in claim 3, wherein the substrate further comprises an icon area preset in the periphery area, the icon area comprising an independent end electrode and an independent sub-electrode formed by the electrode layer and a serially-connected sub-electrode and a sub connection line extending from the serially-connected electrode to the icon area, wherein the serially-connected sub-electrode and the serially-connected electrode are serially and electrically connected by the sub connection line, and mutually insulated independent end electrode and independent sub-electrode are formed at both sides of the sub connection line with intervals.

10. The touch panel as claimed in claim 9, wherein the shielding layer covers the icon area including the independent end electrode, independent sub-electrode, serially-connected sub-electrode, and sub connection line, wherein the independent end electrode and the independent sub-electrode expose a sub wiring hole through the shielding layer respectively and the independent end electrode exposes an end wiring hole through the shielding layer.

11. The touch panel as claimed in claim 10, further comprising:

a bridge sub-wire, formed by a circuit layer and disposed on the shielding layer of the icon area, wherein the bridge sub-wire is electrically bridged to the independent end electrode and the independent sub-electrode through sub wiring holes; and

an overlapping, sub-wire formed by the circuit layer and disposed on the shielding layer of the periphery area, wherein the overlapping sub-wire is electrically connected to the independent end electrode through the end wiring hole.

12. A touch panel, comprising:

a substrate having a touch area and a periphery area, the periphery area surrounding periphery of the touch area;

an electrode layer extended from the touch area to the periphery area, the electrode layer comprising a sensing electrode disposed in the touch area and an overlapping electrode in the periphery area, wherein electrical signals of the sensing electrode are transmitted to an external control circuit through the overlapping electrode;

an insulation layer extended from the touch area to the periphery area, the insulation layer comprising a shielding layer disposed in the periphery area and covering the overlapping electrode.

13. The touch panel as claimed in claim 12 further comprising:

a circuit laser comprising a plurality of main conducting wires on the shielding layer;

wherein the shielding layer has a wiring hole through the shielding layer on the overlapping electrode, and the overlapping electrode being electrically connected to the main conducting wire via the wiring hole.

14. The touch panel as claimed in claim 12, wherein the sensing electrode comprises:

a plurality of serially-connected electrodes disposed along a first polar axis direction;

a connection line disposed between the serially-connected electrodes and electrically connected to the serially-connected electrodes; and

a plurality of independent electrodes, mutually insulated and disposed at both sides of the connection line with intervals along a second polar axis direction.

15. The touch panel as claimed in claim 14, wherein the overlapping electrode comprises:

a first overlapping electrode extending from the independent electrode to the periphery area; and

a second overlapping electrode extending from the serially-connected electrode to the periphery area.

16. The touch panel as claimed in claim 15, wherein the shielding layer has a wiring hole through the shielding layer respectively on the first overlapping electrode and the second overlapping electrode.

17. The touch panel as claimed in claim 16, further comprising an insulation bridge formed by disposing the insulation layer, wherein the insulation bridge is disposed on the connection line of the sensing electrode.

18. The touch panel as claimed in claim 17, the insulation layer further comprising:

a bridge wire disposed on the insulation budge of the touch area and formed by the circuit layer.

19. The touch panel as claimed in claim 14, wherein the substrate further comprises an icon area preset in the periphery area, the icon area comprising an independent end electrode and an independent sub-electrode formed by the electrode layer and a serially-connected sub-electrode and a sub connection line extending from the serially-connected electrode to the icon area, wherein the serially-connected sub-electrode and the serially-connected electrode are serially and electrically connected by the sub connection line, and mutually insulated independent end electrode and independent sub-electrode are formed at both sides of the sub connection line with intervals.

20. The touch panel as claimed in claim 19, wherein the shielding layer covers the icon area including the independent end electrode, independent, sub-electrode, serially-connected sub-electrode, and sub connection line, wherein the independent end electrode and the independent sub-electrode expose a sub wiring hole through the shielding layer respectively and the independent end electrode exposes an end wiring hole through the shielding layer.