DOUBLE-LAYERED CAPACITIVE TOUCH PANEL AND METHOD FOR MANUFACTURING A DOUBLE-LAYERED CAPACITIVE TOUCH PANEL

• US 20130106752A1
• Filed: 10/28/2012
• Published: 05/02/2013
• Est. Priority Date: 10/28/2011
• Status: Abandoned Application

• Current Assignee: Sentelic Technology Co., Ltd.
• Original Assignee: Sentelic Technology Co., Ltd.
• Inventors: LIN, JAO-CHING, CHU, LINABEL, YU, CHIH-CHIEH, CHANG, RONG-SHUN
• Application Number:
  US13/662,501
• Publication Number:
  US 20130106752A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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: Y10T 29/49155 Manufacturing circuit on or in base

Abstract

Approach is provided for a double-layered capacitive touch panel, which comprises a printed circuit board, a first electrode layer, an insulating layer and a second electrode layer. The printed circuit board has an insulating substrate and a conductive foil on the insulating substrate, and comprises multiple first conductive holes and multiple second conductive holes. The conductive foil comprises multiple first conductive lines and multiple second conductive lines. The first electrode layer is printed on a second surface of the insulating substrate, comprises multiple first electrode rows, and conducts to the first conductive lines through the first conductive holes. The insulating layer is printed on the first electrode layer and remaining the exposure of the second conductive holes. The second electrode layer is printed on the insulating layer, comprising multiple second electrode rows that are connected to the second conductive lines through the second conductive holes.

Claims

1. A double-layered capacitive touch panel comprising:

a printed circuit board having an insulating substrate and a conductive foil on a first surface of the insulating substrate, and comprising multiple first conductive holes and multiple second conductive holes formed and penetrated two side of the printed circuit board, wherein the conductive foil comprises multiple first conductive lines and multiple second conductive lines extended to the corresponding conductive holes respectively;

a first electrode layer being printed on a second surface of the insulating substrate, and comprising multiple first electrode rows aligned in the first direction, and being extend to the first conductive holes that electrical conducts to the first conductive lines through the first conductive holes;

an insulating layer being printed on the first electrode layer and remaining the exposure of the second conductive holes; and

a second electrode layer being printed on the insulating layer and comprising multiple second electrode rows, and the second electrode rows being aligned in the second direction and extending to the second conductive holes which are electrically connected to the corresponding second conductive lines through the exposed second conductive holes.

2. The double-layered capacitive touch panel as claimed in claim 1, wherein

the first electrode layer is formed by printing a conductive material on the second surface of the insulating substrate using the screen-printing process;

and

the second electrode layer is formed by printing the conductive material on the insulating layer suing the screen-printing process.

3. The capacitive touch panel as claimed in claim 2, wherein the conductive material is selected from a group consisting a graphite and a silver gel.

4. A double-layered capacitive touch panel comprising:

a printed circuit board having an insulating substrate and a conductive foil on a first surface of the insulating substrate, and comprising multiple first conductive holes and multiple second conductive holes formed and penetrated two side of the printed circuit board, wherein the conductive foil comprises multiple first conductive lines and multiple second conductive lines extended to the corresponding conductive holes respectively;

a third electrode layer being printed on the second surface of the insulating substrate, and comprising multiple third electrode rows and multiple independent electrodes, wherein the third electrode rows are electrically connected to the corresponding first conductive lines through the first conductive holes, and the independent electrodes are placed with the corresponding third electrode rows in an interlaced fashion along the second direction;

an insulating layer being printed on the third electrode layer and remaining the exposure of the second conductive holes; and

multiple third conductive lines being formed on the insulating layer electrically connected to the independent electrodes along the second direction that from multiple fourth electrode rows perpendicular to the third electrode rows having electrically conduct with the second conductive lines through the second conductive holes.

5. The double-layered capacitive touch panel as claimed in claim 4, wherein

the third electrode layer is formed by printing a conductive material on the second surface of the insulating substrate using the screen-printing process;

and

the third conductive lines are formed by printing the conductive material on the insulating layer suing the screen-printing process.

6. The capacitive touch panel as claimed in claim 5, wherein the conductive material is selected from a group consisting a graphite and a silver gel.

7. A method for manufacturing a double-layered capacitive touch panel, comprising:

obtaining a printed circuit board that has a insulating substrate and a conductive foil formed on a first surface of the insulating substrate;

forming multiple first and second conductive holes penetrated two sides of the printed circuit board;

forming multiple first and second conductive lines respectively from the conductive foil corresponded to the first and second conductive holes;

forming a first electrode layer by the screen-printing process on a second surface of the insulating substrate, which creates multiple first electrode rows along a first direction that are electrically connected to the first conductive lines through the corresponding first conductive holes;

forming an insulating layer by the screen-printing process which covers the first electrode rows and the first conductive holes, wherein the second conductive holes are remain exposed; and

forming a second electrode layer by the screen-printing process on the insulating substrate, which creates multiple second electrode rows along a second direction that are electrically connected to the second conductive lines through the corresponding second conductive holes.

8. The method as claimed in claim 7, wherein the first and the second electrode layers are made of a conductive material that is selected from a group consisting of a graphite and a silver gel.

9. The method as claimed in claim 8, wherein the first electrode layer is then dried after the conductive material is introduced and has conducted with the first conductive lines through the first conductive holes.

10. The method as claimed in claim 8, wherein the insulating layer is dried after the being printed on the first electrode layer.

11. The method as claimed in claim 8, wherein the second electrode layer is then dried after the conductive material is introduced and has conducted with the second conductive lines through the second conductive holes.

12. A method for manufacturing a double-layered capacitive touch panel, comprising:

obtaining a printed circuit board that has a insulating substrate and a conductive foil formed on a first surface of the insulating substrate;

forming multiple first and second conductive holes penetrated two sides of the printed circuit board;

forming multiple first and second conductive lines respectively from the conductive foil corresponded to the first and second conductive holes;

forming a third electrode layer by the screen-printing process on a second surface of the insulating substrate, which creates multiple third electrode rows and multiple independent electrodes, wherein the third electrode rows are aligned in a first direction and connects to the first conductive lines through the first conductive holes, and the independent electrodes are aligned in a second direction and corresponds the third electrode rows in an interlaced fashion;

forming an insulating layer on the third electrode layer by the screen-printing process that covers the third electrode rows and the first conductive holes, and remains the independent electrodes and the second conductive holes exposed; and

forming multiple third conductive lines on the insulating layer by the screen-printing process which electrically connect to the independent electrodes along the second direction that from multiple fourth electrode rows perpendicular to the third electrode rows having electrically connects with the second conductive lines through the second conductive holes.

13. The method as claimed in claim 12, wherein the exposure of the independent electrodes and the second conductive holes whereby forming multiple through holes on the insulating layer communicated with the independent electrodes and the second conductive holes respectively.

14. The method as claimed in claim 12, wherein the third conductive lines are printed on the insulating layer along the second direction, and the third conductive lines are electrically connected to the independent electrodes and the second conductive hole through the through holes that form multiple fourth electrode rows.

15. The method as claimed in claim 12, wherein the third electrode later and the third conductive lines are made of a conductive material that is selected from a group consisting of a graphite and a silver gel.

16. The method as claimed in claim 15, wherein the third electrode layer is then dried after the conductive material is introduced and has conducted with the first conductive lines through the first conductive holes.

17. The method as claimed in claim 15, wherein the insulating layer is dried after the being printed on the first electrode layer.

18. The method as claimed in claim 15, wherein the third conductive lines are then dried after the conductive material is introduced and has conducted with the second conductive lines through the second conductive holes.