Laser patterning of frame wire area on touch panel

• US 9,282,645 B2
• Filed: 12/16/2013
• Issued: 03/08/2016
• Est. Priority Date: 12/16/2013
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Ciou, Jyun-Kai, Huang, Chia-Sheng, Wei, Ching-Chih, Shih, Ya-Chun
• Primary Examiner(s): CERULLO, LILIANA P
• Application Number:
  US14/107,948
• Publication Number:
  US 20150169090A1
• Time in Patent Office: 813 Days
• US Class Current: 1/1
• CPC Class Codes: B23K 2101/40 Semiconductor devices
• CPC Class Codes: B23K 2103/172 wherein at least one of the layers is non-metallic
• CPC Class Codes: B23K 2103/50 Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
• CPC Class Codes: B23K 26/361 for deburring or mechanical trimming B23K26/351 takes precedence
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: H05K 3/027 the conductive material being removed by irradiation, e.g. by photons, alpha or beta particles

Abstract

A laser patterning touch panel includes an active area, an inactive area, and a plurality of first coaxial patterns. The active area is disposed in a center area of the substrate. The inactive area does not overlap the active area and has a transparent conductive layer thereon. The plurality of first coaxial patterns are disposed on the transparent conductive layer and surround the active area. Each of the plurality of first coaxial patterns includes a continuous line segment with a width, and partially overlaps with a neighboring one of the first coaxial patterns.

Claims

1. A laser-patterned touch panel, comprising:

an active area, configured at a center of the touch panel;

an inactive area, wherein the inactive area is not overlapped with the active area, and a transparent conductive layer is disposed on the inactive area;

a plurality of first coaxial patterns formed in the transparent conductive layer and surrounding the active area, wherein each pattern of the first coaxial patterns comprises a continuous line segment with a first width and partially overlaps with a neighboring one of the first coaxial patterns, and the first coaxial patterns are arranged to form a first insulation area; and

a patterned conductive metal layer disposed on the first coaxial patterns forming the first insulation area.

2. The laser-patterned touch panel as claimed in claim 1, wherein a resistance of the plurality of first coaxial patterns is at least larger than 20M Ohm to form the first insulation area.

3. The laser-patterned touch panel as claimed in claim 1, further comprising a plurality of second coaxial patterns disposed between the active area and the first coaxial patterns, wherein a resistance of the second coaxial patterns is at least larger than 20M Ohm to form a second insulation area.

4. The laser-patterned touch panel as claimed in claim 1, wherein the transparent conductive layer is formed using Indium Tin Oxide (ITO), ZnO, silver nanowire, carbon nanotube, graphene, or PEDOT.

5. The laser-patterned touch panel as claimed in claim 1, wherein the touch panel is fabricated by ultra-thin flexible glass, polyethylene terephthalate (PET), polymide (PI), or polycarbonate (PC).

6. Laser-patterned touch panel as claimed in claim 1, wherein the first coaxial patterns respectively overlap along a direction of a lengthwise extension thereof.

7. A laser-patterned touch panel, comprising:

a first inactive area, disposed on the touch panel and comprising a transparent conductive layer;

a plurality of first coaxial patterns formed in the first inactive area of the transparent conductive layer and having a first axle center, the plurality of first coaxial patterns formed by removing portions of the transparent conductive layer, wherein the first coaxial patterns are formed by a continuous line segment with a first width, each of the first coaxial patterns partially overlaps with a neighboring one of the first coaxial patterns, and the first coaxial patterns are arranged to form a first insulation area; and

a patterned conductive metal layer disposed on the first coaxial patterns forming the first insulation area.

8. The laser-patterned touch panel as claimed in claim 7, wherein the first axle center is a center or a center of gravity of the first inactive area.

9. The laser-patterned touch panel as claimed in claim 7, further comprising:

a second inactive area, disposed on the touch panel, not overlapped with the first inactive area, and having the transparent conductive layer; and

a plurality of second coaxial patterns, having a second axle center and disposed on the second inactive area, for removing the transparent conductive layer;

wherein the second coaxial patterns are formed by another continuous line segment with a second width, and each of the second coaxial patterns partially overlaps with a neighboring one of the second coaxial patterns.

10. The laser-patterned touch panel as claimed in claim 9, wherein the second axle center is a center or a gravity of center of the second inactive area, and the first axle center is different from the second axle center.

11. Laser-patterned touch panel as claimed in claim 7, wherein the first coaxial patterns respectively overlap along a direction of a lengthwise extension thereof.

12. The laser-patterned touch panel as claimed in claim 7, further comprising the active area disposed at center of the touch panel and not overlapped with the first inactive area.

13. The laser-patterned touch panel as claimed in claim 12, wherein the first inactive area surrounds the active area, and the first axle center is a center or gravity of center of the inactive area.