STRUCTURE AND THE ASSOCIATED MANUFACTURING PROCESS FOR A SINGLE-SIDED MULTI-LAYER MUTUAL CAPACITANCE TOUCH PANEL

• US 20150253902A1
• Filed: 02/16/2015
• Published: 09/10/2015
• Est. Priority Date: 03/07/2014
• Status: Abandoned Application

• Current Assignee: CN Innovations Holdings Hong Kong Limited
• Original Assignee: CN Innovations Holdings Hong Kong Limited
• Inventors: CHAN, Winston
• Application Number:
  US14/623,178
• Publication Number:
  US 20150253902A1
• Time in Patent Office: Days
• 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 2203/04111 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 Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

Abstract

A structure for a mutual capacitance touch panel consists of two conducting layers formed on the same side of a non-conducting substrate, insulating gaps within the structure, and insulating blocks formed between the two conducting layers for electrical isolation. This structure relies on the insulating gaps to form a touch function circuit in the first direction, a first auxiliary touch function region on the first conducting layer, a second touch function circuit in the second direction, and a second auxiliary touch function region on the second conducting layer. The insulating blocks are arranged at intersecting points of the first and second conducting touch function circuits that electrically isolate the first and the second conducting circuits. This structure is achieved by using a simple manufacturing process with a high yield but low material consumption thereby allowing a novel touch function structure to be implemented.

Claims

1. A touch function structure for capacitive touch panels comprising:

a first conducting touch function layer formed on a non-conducting substrate and a second conducting touch function layer formed on top of the first conducting touch function layer, wherein the substrate includes a plurality of insulating gaps within the touch function structure;

a plurality of insulating blocks arranged between the first conducting touch function layer and the second conducting touch function layer, wherein the plurality of insulating gaps form a first direction conducting touch function circuit; and

first auxiliary touch function regions formed on the first conducting touch function layer, formed on a second direction conducting touch function circuit, and formed on second auxiliary touch function regions arranged on the second conducting touch function layer.

2. The touch function structure for capacitive touch panels according to claim 1, further comprising:

in a first conducting direction, the plurality of insulating blocks arranged between the second auxiliary touch function regions on the second conductive touch function layer and the first direction touch function circuit.

3. The touch function structure for capacitive touch panels according to claim 1, further comprising:

in a second conducting direction, the plurality of insulating blocks arranged between the first auxiliary touch function regions on the first conductive touch function layer and the second direction touch function circuit.

4. The touch function structure for capacitive touch panels according to claim 1, further comprising:

the plurality of insulating blocks arranged at a plurality of intersection points formed by common areas of the first conducting touch function circuit and the second conducting touch function circuit, wherein the plurality of insulating blocks electrically isolate the first direction conducting touch function circuit from the second direction conducting touch function circuit.

5. The touch function structure for capacitive touch panels according to claim 1, wherein the substrate is formed of a non-conducting material selected from polyethylene terephthalate (PET), glass, and polymethyl methacrylate (PMMA).

6. The touch function structure for capacitive touch panels according to claim 1, wherein the first conducting touch function layer and the second conducting touch function layer are formed of the same conducting material.

7. The touch function structure for capacitive touch panels according to claim 1, wherein the first conducting touch function layer and the second conducting touch function layer are formed of different conducting materials.

8. The touch function structure for capacitive touch panels according to claim 1, wherein the material for manufacturing the first conducting touch function layer and the second conducting touch function layer is a transparent conducting material selected from indium tin oxide, carbon nanotube, zinc oxide, nanowire, and graphene.

9. The touch function structure for capacitive touch panels according to claim 1, wherein the insulating blocks are made of transparent insulating materials.

10. The touch function structure for capacitive touch panels according to claim 1, wherein the touch function circuit is configured to have a geometric shape selected from a rectangle, a dumbbell, and a funnel.