Touch panel and method for fabricating the same

Patent metadata

Field	Value
Publication number	US-9262018-B2
Application number	US-201113308282-A
Country	US
Kind code	B2
Filing date	Nov 30, 2011
Priority date	Apr 12, 2011
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A touch panel is made by forming a routing and pad pattern group on a substrate to include first and second routing lines, first pad electrodes connected to the first routing line, and second pad electrodes connected to the second routing line, by using a first mask; forming a sensor electrode pattern group on the substrate having the routing and pad pattern group formed thereon to include first sensor electrodes formed in a first direction, second sensor electrodes formed in a second direction, and connection portions that each connects adjacent first sensor electrodes, by using a second mask; forming a first insulating layer to include contact holes to expose portions of the second sensor electrodes, respectively, by using a third mask; and forming bridges that each connects adjacent second sensor electrodes through the contact holes and a second insulating layer on the bridges, by using a fourth mask.

First claim

What is claimed is:

1. A touch panel comprising:
a plurality of first sensor electrodes on a substrate and formed in a first direction for sensing a position in the first direction;
a plurality of connection portions on the substrate, each connection portion connecting adjacent first sensor electrodes in the first direction;
a plurality of second sensor electrodes on the substrate and formed in a second direction to cross the first direction for sensing a position in the second direction;
a first insulating layer on the substrate having the first and second sensor electrodes and the connection portions formed thereon, the first insulating layer having contact holes exposing portions of the second sensor electrodes; and
a plurality of bridges on the first insulating layer to connect adjacent second sensor electrodes in the second direction through the contact holes, each of the plurality of bridges having a top surface and a side surface; and
a second insulating layer formed only on the top surface of the bridges and not on the side surface to have a pattern the same with the bridges.

2. The touch panel as claimed in claim 1 , wherein the first and second sensor electrodes and the connection portions are formed of a same material and on the same layer.

3. The touch panel as claimed in claim 1 , further comprising:
a first routing line electrically connected to the second sensor electrodes for receiving or transmitting a first signal; and
a second routing line electrically connected to the first sensor electrodes for receiving or transmitting a second signal.

4. The touch panel as claimed in claim 3 , further comprising:
a first pad electrode connected to the first routing line; and
a second pad electrode connected to the second routing line.

5. The touch panel as claimed in claim 4 , wherein the first and second pad electrodes are formed of the same material and on the same layer with the first and second routing lines.

6. The touch panel as claimed in claim 5 , further comprising:
a first transparent pad electrode formed on the first pad electrode; and
a second transparent pad electrode formed on the second pad electrode.

7. The touch panel as claimed in claim 6 , wherein the first and second sensor electrodes are crystallized transparent electrodes.

8. The touch panel as claimed in claim 7 , wherein the first and second transparent pad electrodes are formed of the same material and on the same layer with the first and second sensor electrodes.

Assignees

• Kim Seung-Hyun
• Kim Hyung-Chul
• Yoo Tae-Yeon
• Lg Display Co Ltd

Inventors

• Kim Seung-Hyun
• Kim Hyung-Chul
• Yoo Tae-Yeon

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F2203/04111

  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 title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title