Conductive structure and method of manufacturing the same

• US 9,006,598 B2
• Filed: 04/27/2011
• Issued: 04/14/2015
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Meng, Kai
• Primary Examiner(s): Leon, Edwin A.
• Assistant Examiner(s): Jimenez, Anthony R.
• Application Number:
  US13/095,726
• Publication Number:
  US 20110279405A1
• Time in Patent Office: 1,448 Days
• Field of Search: 200/600, 200/46, 200/5.R, 200/5.A, 200/292, 200/243, 345/173
• US Class Current: 200/600
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0445 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: Y10T 29/4913 Assembling to base an electrical component, e.g., capacitor, etc.

Abstract

The disclosure relates to a touch panel, a method for manufacturing the same, and a touch display device using the same. The touch panel includes a substrate, a lower conductive layer disposed on the substrate, an insulating layer disposed on the lower conductive layer, at least one first conductive wire disposed on the insulating layer, a light shielding layer disposed on the first conductive wire, and an upper conductive layer disposed on the light shielding layer. The light shielding layer and the at least one first conductive wire are located in an edge region of the touch panel in a planar view. The light shielding layer includes at least one first through hole. The upper conductive layer is electrically connected to the at least one first conductive wire via the at least one first through hole.

Claims

1. A touch panel, comprising:

a substrate;

a lower conductive layer disposed on the substrate;

an insulating layer disposed on the lower conductive layer;

at least one first conductive wire disposed on the insulating layer;

a light shielding layer disposed on the first conductive wire; and

an upper conductive layer disposed on the light shielding layer and electrically insulated from the lower conductive layer by the insulating layer, wherein the light shielding layer and the at least one first conductive wire are located in an edge region of the touch panel in a planar view, the light shielding layer comprises at least one first through hole, and the upper conductive layer is electrically connected to the at least one first conductive wire via the at least one first through hole.

2. The touch panel according to claim 1, further comprising a transparent cover layer located on the upper conductive layer, wherein the upper conductive layer is formed directly on the transparent cover layer.

3. The touch panel according to claim 1, wherein the upper conductive layer comprises a plurality of first conductive traces extending in a first direction, the at least one first conductive wire is electrically connected to one of the first conductive traces via the at least one first through hole;

and the lower conductive layer comprises second conductive traces insulatively intersecting the first conductive traces and extending in a second direction perpendicular to the first direction.

4. The touch panel according to claim 3, wherein the lower conductive layer further comprises at least one additional conductive trace extending in the second direction, the at least one additional conductive trace is located in the edge region, and the at least one additional conductive trace partially overlaps with one of the first conductive traces or at least one first conductive wire to form at least one first touch capacitor.

5. The touch panel according to claim 4, wherein the at least one first through hole corresponds to the at least one first touch capacitor, and the at least one first through hole serves as a touch function control character of the at least one first touch capacitor.

6. The touch panel according to claim 5, wherein the touch function control character is a volume control character, a music-video-play control character or a screen-slide control character.

7. The touch panel according to claim 6, wherein the touch panel further comprises at least one second conductive wire located in the edge region, and the at least one second conductive wire is to be electrically connected to the of second conductive traces of the lower conductive layer.

8. The touch panel according to claim 7, wherein the upper conductive layer further comprises at least one additional conductive trace extending in the first direction, and the at least one additional conductive trace of the upper conductive layer partially insulatively overlaps with one of the second conductive traces or the at least one second conductive wire to form at least one second touch capacitor.

9. The touch panel according to claim 8, wherein the light shielding layer further comprises at least one second through hole, which corresponds to the at least one second touch capacitor and serves as a touch function control character of the at least one second touch capacitor.

10. The touch panel according to claim 7, wherein the edge region comprises a joint region, one end of the at least one first conductive wire and one end of at least one second conductive wire are arranged in the joint region and are to be electrically connected to an external circuit.

11. The touch panel according to claim 10, wherein there are a plurality of the first conductive wires, there are a plurality of the first through holes, and the first conductive traces are electrically connected to the first conductive wires via the first through holes.

12. The touch panel according to claim 11, wherein there are a plurality of the second conductive wires, and the second conductive wires are electrically connected to the second conductive traces.

13. The touch panel according to claim 2, wherein a material of the transparent cover layer is glass or an acrylic material.

14. A method for manufacturing a touch panel, the method comprising the steps of:

providing a transparent substrate serving as a transparent cover layer of the touch panel;

forming an upper conductive layer directly on the transparent cover layer;

forming a light shielding layer on one side of the upper conductive layer away from the transparent cover layer and forming at least one first through hole in the light shielding layer;

forming at least one first conductive wire on one side of the light shielding layer away from the upper conductive layer, wherein the at least one first conductive wire is electrically connected to the upper conductive layer via the at least one first through hole;

forming an insulating layer on one side of the at least one first conductive wire away from the light shielding layer; and

forming a lower conductive layer on one side of the insulating layer away from the at least one first conductive wire, wherein the lower conductive layer is electrically insulated from the upper conductive layer by the insulating layer.

15. A touch display device, comprising a touch panel and a display panel overlapping with the touch panel, wherein the touch panel comprises a substrate and a lower conductive layer, an insulating layer, at least one first conductive wire, a light shielding layer and an upper conductive layer, which are successively disposed in a surface direction away from the substrate, wherein the upper conductive layer is electrically insulated from the lower conductive layer, the light shielding layer defines the touch panel into a transparent display region and an edge region where the light shielding layer is located, the at least one first conductive wire is located in the edge region, the light shielding layer comprises at least one first through hole, the at least one first conductive wire has one end electrically coupled to an external circuit, and the other end electrically coupled to the upper conductive layer via the at least one first through hole.