Touch screen panel for display device and method of manufacturing the same

• US 9,397,659 B2
• Filed: 12/26/2012
• Issued: 07/19/2016
• Est. Priority Date: 04/16/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kook, Yunho, Lee, Namseok, Yoo, Soonsung, Kim, Chulho
• Primary Examiner(s): Hon, Sophie
• Application Number:
  US13/727,225
• Publication Number:
  US 20140110239A1
• Time in Patent Office: 1,301 Days
• Field of Search: 428/1.4, 428 98-220, 345173-174, 257/750, 257/774, 257/779
• US Class Current: 1/1
• 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: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2217/96046 Key-pad combined with display, back-lit

Abstract

A touch screen panel for a display device includes layers of polymer formed on both sides of a substrate for forming driving electrodes and sensing electrodes. The substrate may be made of materials such as polyethylene terephthalate (PET). Instead of bonding a window cover made of a heavy material, layers or polymer are formed on both sides of the substrate to afford rigidity to the touch screen panel. By removing the window cover, the weight and thickness of the touch screen panel can be reduced.

Claims

1. A touch screen panel comprising:

a substrate having a first surface and a second surface at a side opposite to the first surface;

a first polymer layer on the first surface of the substrate;

a plurality of first electrodes extending in a first direction on the second surface of the substrate;

a second polymer layer on the plurality of first electrodes and the second surface of the substrate, the second polymer layer having contact holes to expose each of the plurality of first electrodes;

a plurality of second electrodes, insulated from the plurality of first electrodes by the second polymer layer, the plurality of second electrodes extending in a second direction on the second polymer layer;

a plurality of routing wires, each of the plurality of routing wires disposed on the second polymer layer and having a portion disposed in a corresponding contact hole formed in the second polymer layer to electrically connect to a corresponding first electrode, the portion of the routing wire comprising at least a first layer and a second layer, the first layer comprising a same transparent conductive material as the plurality of second electrodes, and the second layer comprising a different material than the first layer, and wherein the first layer is positioned between the second layer and the corresponding first electrode; and

a plurality of conductive auxiliary patterns on the routing wires and inside each corresponding contact hole, in contact with the second layer of the portion of each of the plurality of routing wires disposed in the corresponding contact hole, respectively.

2. The touch screen panel of claim 1, wherein the second layer of the portion of the routing wire is made of metal selected from the group consisting of Al, AlNd, Mo, MoTi, Cu, Cr, Ag, and Ag-based alloys.

3. The touch screen panel of claim 1, wherein the first polymer layer and the second polymer layer are made of a same material.

4. The touch screen panel of claim 1, wherein the first polymer layer and the second polymer layer are formed of an ultraviolet curable resin or a thermosetting resin.

5. The touch screen panel of claim 1, wherein the substrate is formed of a polymer material.

6. The touch screen panel of claim 1, wherein the first layer of the portion of the routing wire and the plurality of second electrodes are made of a transparent conductive material selected from the group consisting of ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), GZO (Gallium-doped Zinc Oxide), metal nanowires, and carbon-based transparent electrodes.

7. The touch screen panel of claim 1, wherein each of the plurality of first electrodes has a plurality of intersecting mesh lines, and each of the plurality of second electrodes has a plurality of intersecting mesh lines.

8. The touch screen panel of claim 7, wherein the plurality of intersecting mesh lines of the plurality of first electrodes and the plurality of second electrodes shaped as a triangle, rectangle, diamond, polygon, ellipse or a dragonfly shape.

9. The touch screen panel of claim 1, further comprising a plurality of pads formed on the first surface of the substrate, wherein each of the plurality of pads are electrically connected to each of the plurality of first electrodes through each of the plurality of routing wires.

10. The touch screen panel of claim 9, wherein each of the plurality of pads are made of metal selected from the group consisting of Al, AlNd, Mo, MoTi, Cu, Cr, Ag, and Ag-based alloys.

11. The touch screen panel of claim 1, wherein the plurality of first electrodes may have first nodes shaped as a triangle, rectangle, diamond, polygonal, circle or ellipse, and the plurality of second electrodes may have second nodes shaped as a triangle, rectangle, diamond, polygon, circle or ellipse.

12. The touch screen panel of claim 1, wherein the plurality of conductive auxiliary patterns comprises Ag.