Touch panel

Patent metadata

Field	Value
Publication number	US-10300679-B2
Application number	US-201815961969-A
Country	US
Kind code	B2
Filing date	Apr 25, 2018
Priority date	May 21, 2015
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

The disclosure relates to a touch panel. The touch panel includes a substrate having a surface, a metal nanowire film, at least one electrode, and a conductive trace. The metal nanowire film includes a metal nanowire film. The metal nanowire film includes a number of first metal nanowire bundles parallel with and spaced from each other. Each of the number of first metal nanowire bundles includes a number of first metal nanowires parallel with each other. The first distance between adjacent two of the number of first metal nanowires is less than the second distance between adjacent two of the number of first metal nanowire bundles.

First claim

What is claimed is:

1. A touch panel, the touch panel is capacitance-type and comprising:
a substrate having a surface;
a metal nanowire film located on the surface of the substrate, wherein the metal nanowire film comprises a plurality of metal nanowire bundles parallel with and spaced from each other;
each of the plurality of metal nanowire bundles comprises a plurality of metal nanowires parallel with each other; and a first distance between adjacent metal nanowires is less than a second distance between adjacent metal nanowire bundles;
a plurality of electrodes spaced apart from teach other and electrically connected to the plurality of metal nanowire bundles, wherein each of the plurality of electrodes is connected to only one of the plurality of metal nanowire bundles; and
a conductive trace located on the surface of the substrate, wherein the conductive trace comprises a plurality of conductive wires, each of the plurality of conductive wires is electrically connected with only one of the plurality of electrodes;
wherein the plurality of electrodes are electrically connected to and in direct contact with the plurality of metal nanowire bundles in an one-to-one manner, and the plurality of electrodes are electrically connected to and in direct contact with the plurality of conductive wires in an one-to-one manner; the plurality of electrodes are electrically insulated from each other, and the plurality of conductive wires are electrically insulated from each other.

2. The touch panel of claim 1 , wherein the first distance is in a range from about 0 nanometers to about 50 nanometers; and the second distance is in a range from about 10 micrometers to about 100 micrometers.

3. The touch panel of claim 1 , wherein a first width of each of the plurality of metal nanowire bundles is in a range from about 50 micrometers to about 500 micrometers; and a second width of each of the plurality of metal nanowires is in a range from about 0.5 nanometers to about 50 nanometers.

4. The touch panel of claim 1 , wherein the metal nanowire film is located only on a touch-view area, and the conductive trace is located only on a trace area.

5. The touch panel of claim 1 , wherein all of the conductive trace, the plurality of electrodes, and the metal nanowire film are integrated and made by etching a metal film.

6. A touch panel, comprising:
a substrate having a first surface and a second surface opposite to the first surface;
a first metal nanowire film located on the first surface of the substrate, wherein the first metal nanowire film comprises a plurality of first metal nanowires parallel with, spaced from each other and extending along a first direction; each of the plurality of first metal nanowires consists of a first metal element, and a first width of each of the plurality of first metal nanowires is in a range from about 0.5 nanometers to about 50 nanometers;
a plurality of first electrodes located on the first surface and electrically connected with the first metal nanowire film;
a first conductive trace located on the first surface and electrically connected with the plurality of first electrodes;
a second metal nanowire film located on the second surface of the substrate and comprising a plurality of second metal nanowires parallel with, spaced from each other and extending along a second direction perpendicular with the first direction; and a second width of each of the plurality of second metal nanowires is in a range from about 0.5 nanometers to about 50 nanometers;
a plurality of second electrodes located on the second surface and electrically connected with the second metal nanowire film; and
a second conductive trace located on the second surface and electrically connected with the plurality of second electrodes.

7. The touch panel of claim 6 , wherein a distance between adjacent first metal nanowires is less than 50 nanometers.

8. The touch panel of claim 6 , wherein the first metal element is selected from the group consisting of gold, silver, copper, iron, aluminum, nickel, and chromium.

9. The touch panel of claim 6 , wherein each of the plurality of second metal nanowires consists of a second metal element.

10. The touch panel of claim 9 , wherein the second metal element is selected from the group consisting of gold, silver, copper, iron, aluminum, nickel, and chromium.

11. The touch panel of claim 6 , wherein the substrate is curved.

12. The touch panel of claim 6 , wherein the substrate is flexible.

Assignees

• Univ Tsinghua
• Hon Hai Prec Ind Co Ltd

Inventors

• Jin Yuan-Hao
• Li Qun-Qing
• Fan Shou-Shan

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• B32B5/028

  Net structure, e.g. spaced apart filaments bonded at the crossing points · CPC title

• H05K2201/0323

  Carbon · CPC title

• C03C2217/255

  Au · CPC title

• C03C2217/253

  Cu · CPC title