Touch panel and fabrication method thereof

Patent metadata

Field	Value
Publication number	US-9442589-B2
Application number	US-201414256996-A
Country	US
Kind code	B2
Filing date	Apr 21, 2014
Priority date	Apr 24, 2013
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A touch panel having a display region and a periphery region is disclosed, wherein the touch panel comprises a cover substrate, a patterned mask layer formed on the cover substrate and the patterned mask layer includes a pattern region. The periphery region is defined by the patterned mask layer. A first electrode pattern having a plurality of first jumpers is disposed on the cover substrate and correspondingly to the display region, and a second electrode pattern having a plurality of second jumpers is disposed on the patterned mask layer and correspondingly to the pattern region, wherein the first jumpers and the second jumpers comprise different materials.

First claim

What is claimed is:

1. A touch panel having a display region and a periphery region, comprising:
a cover substrate;
a patterned mask layer formed on the cover substrate and covering the periphery region thereof, wherein the patterned mask layer includes a pattern region;
a first electrode pattern disposed on the cover substrate and positioned within the display region of the touch panel, the first electrode pattern comprising:
a plurality of first sensing electrodes disposed along a first axial direction and parallel to each other;
a plurality of second sensing electrodes disposed along a second axial direction and parallel to each other, each of the second sensing electrodes comprising a plurality of second conductive units disposed along the second axial direction and spaced apart from each other, wherein the first sensing electrodes are electrically isolated from the second sensing electrodes; and
a plurality of first jumpers, wherein every two adjacent second conductive units are electrically connected via the first jumpers; and

at least one second electrode pattern disposed on the patterned mask layer and positioned within the periphery region of the touch panel, the second electrode pattern comprising:
a plurality of third sensing electrodes disposed along the first axial direction and parallel to each other;
a plurality of fourth sensing electrodes disposed along the second axial direction and parallel to each other, each of the fourth sensing electrodes comprising a plurality of fourth conductive units disposed along the second axial direction and spaced apart from each other, wherein the third sensing electrodes are electrically isolated from the fourth sensing electrodes; and
a plurality of second jumpers, wherein every two adjacent fourth conductive units are electrically connected via the second jumpers; and

wherein the first jumpers in the display region and the second jumpers in the peripheral region comprise different materials.

2. The touch panel of claim 1 , wherein the at least one second electrode pattern is electrically connected to the first electrode pattern and serves as an extension of the first electrode pattern.

3. The touch panel of claim 1 , wherein the pattern region comprises a hollow pattern.

4. The touch panel of claim 1 , further comprising a color film corresponding to the patterned mask layer.

5. The touch panel of claim 1 , wherein the first electrode pattern and the second electrode pattern are classified as a sensing electrode layer.

6. The touch panel of claim 5 , further comprising a passivation layer disposed on the sensing electrode layer.

7. The touch panel of claim 5 , wherein the sensing electrode layer further comprises an insulating layer disposed between the first sensing electrodes and the second sensing electrodes, as well as between the third sensing electrodes and the fourth sensing electrodes.

8. The touch panel of claim 5 , further comprising a trace corresponding to the periphery region, wherein the trace is electrically connected to the first electrode pattern and the at least one second electrode pattern.

9. The touch panel of claim 1 , wherein the first jumpers comprise a transparent conductive material and the second jumpers comprise a metal material.

10. A fabrication method of a touch panel having a display region and a periphery region surrounding the display region, wherein the fabrication method of the touch panel comprises:
forming a patterned mask layer on a cover substrate, wherein the patterned mask layer comprises a pattern region, and the patterned mask layer defines the periphery region; and
forming a sensing electrode layer having a first electrode pattern corresponding to the display region and a second electrode pattern corresponding to the pattern region, wherein the forming a sensing electrode layer comprises:
coating a conductive layer on the cover substrate and the patterned mask layer;
patterning the conductive layer to form a plurality of parallel first sensing electrodes disposed along a first axial direction within the display region and a plurality of parallel third sensing electrodes disposed along the first axial direction within the periphery region, and to form a plurality of second sensing electrodes disposed along a second axial direction and spaced apart from each other within the display region and a plurality of fourth sensing electrodes disposed along the second axial direction and spaced apart from each other within the periphery region;
coating and patterning an insulating layer at partial regions of the first sensing electrodes and partial regions of the third sensing electrodes;
forming first jumpers on the insulating layer coated on the first sensing electrodes, wherein the first jumpers electrically connect every two adjacent second conductive units; and
forming second jumpers on the insulating layer coated on the third sensing electrodes, wherein the second jumpers electrically connect every two adjacent fourth conductive units;

wherein the first jumpers within the display region and the second jumpers within the periphery region comprise different materials.

11. The fabrication method of claim 10 , wherein the second jumpers are formed on the patterned mask layer and directly contact the patterned mask layer.

12. The fabrication method of claim 10 , further comprising forming a color film corresponding to the patterned mask layer.

13. The fabrication method of claim 10 , further comprising forming a passivation layer on the sensing electrode layer.

14. The fabrication method of claim 10 , wherein the first jumpers comprise a transparent conductive material and the second jumpers comprise a metal material.

15. The fabrication method of claim 10 , further comprising a trace corresponding to the periphery region, wherein the trace is electrically connected to the first electrode pattern and the second electrode pattern.

16. A fabrication method of a touch panel having a display region and a periphery region surrounding the display region, wherein the fabrication method of the touch panel comprises:
forming a patterned mask layer on a cover substrate, wherein the patterned mask layer comprises a pattern region, and the patterned mask layer defines the periphery region; and
forming a sensing electrode layer having a first electrode pattern corresponding to the display region and a second electrode pattern corresponding to the pattern region, wherein the forming a sensing electrode layer comprises:
forming a plurality of first jumpers on the cover substrate within the display region;
forming a plurality of second jumpers on the patterned mask layer within the periphery region;
coating an insulating layer on the cover substrate, the patterned mask layer, the first jumpers and the second jumpers;
patterning the insulating layer to form a plurality of via holes, wherein the via holes correspond to two ends of the first jumpers and the second jumpers respectively to expose partial regions of the first jumpers and the second jumpers;
coating a conductive layer on the insulating layer and the via holes; and
patterning the conductive layer to form a plurality of parallel first sensing electrodes disposed along a first axial direction within the display region, a plurality of parallel third sensing electrodes disposed along the first axial direction within the periphery region, a plurality of second conductive units disposed along a second axial direction and spaced from each other within the display region, and a plurality of fourth conductive units disposed along the second axial dire

Assignees

• Tpk Touch Solutions Xiamen Inc

Inventors

• Jiang Yau-Chen
• Yan Jianbin
• Chi Ho-Hsun
• Wu Defa

Classifications

• G06F2203/04103

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

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing 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