Narrow Border for Capacitive Touch Panels

• US 20110001717A1
• Filed: 07/06/2010
• Published: 01/06/2011
• Est. Priority Date: 07/06/2009
• Status: Abandoned Application

• Current Assignee: Multek Display Limited (New Vision Display, Inc.)
• Original Assignee: Multek Display Limited (New Vision Display, Inc.)
• Inventors: Cohn, Brian, Murray, Galen, Hayes, Charles
• Application Number:
  US12/830,573
• Publication Number:
  US 20110001717A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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

Abstract

A touch screen sensor assembly and associated method for manufacturing the touch screen sensor assembly are provided. The touch screen assembly includes one or more transparent substrates that are arranged above a display. Each of the transparent substrates may include a conductive layer that is disposed adjacent to a surface of a corresponding one of the substrates. In addition, a set of conductive traces may be disposed on each of the transparent substrates and in conductive communication with the corresponding conductive layer. At least one of the sets of conductive traces may be deposited using electro deposition or vacuum deposition techniques so as to reduce a width of each trace, thereby reducing the size of a non-transparent border that surrounds the transparent substrates, maximizing the available portion of the transparent substrates for use in touch sensing.

Claims

1. A capacitive touch screen panel, comprising:

a first transparent substrate that includes a first conductive layer disposed adjacent to a surface thereof;

a second transparent substrate that includes a second conductive layer disposed adjacent to a surface thereof;

a first set of conductive traces disposed on the first transparent substrate and in conductive communication with the first conductive layer; and

a second set of conductive traces disposed on the second transparent substrate and in conductive communication with the second conductive layer, wherein at least one of the first set of conductive traces and the second set of conductive traces are deposited by one of electro deposition and vacuum deposition.

2. The capacitive touch screen panel of claim 1, wherein a space separates each of the conductive traces, and wherein each of the conductive traces has a trace width that is less than 80 μ

m, and wherein each of the spaces has a space width that is less than 80 μ

m.

3. The capacitive touch screen panel of claim 1, further comprising:

a third transparent substrate that includes a third conductive layer disposed adjacent to a surface thereof; and

a third set of conductive traces disposed on the third transparent substrate and in conductive communication with the third conductive layer, wherein the third set of conductive traces are deposited by electro deposition, vacuum deposition, or screen printing.

4. The capacitive touch screen panel of claim 1, wherein the first transparent substrate, the first conductive layer, and the first set of conductive traces form a top layer, and wherein a transparent cover layer is associated with the top layer.

5. The capacitive touch screen panel of claim 1, wherein the first set of conductive traces electrically connects with a top surface of the first conductive layer.

6. The capacitive touch screen panel of claim 1, wherein the first set of conductive traces electrically connects with a bottom surface of the first conductive layer.

7. The capacitive touch screen panel of claim 1, wherein one of the first and second conductive layers comprises a pattern of electrodes.

8. The capacitive touch screen panel of claim 7, wherein the pattern of electrodes comprises a pattern of diamond-shaped electrodes.

9. The capacitive touch screen panel of claim 1, wherein each of the first and second transparent substrates comprise a plastic film.

10. The capacitive touch screen panel of claim 1, wherein the capacitive touch screen panel is at least partially manufactured using a roll-to-roll process.

11. The capacitive touch screen panel of claim 1, wherein one of the first and second conductive layers comprises an indium tin oxide (ITO) layer.

12. The capacitive touch screen panel of claim 1, wherein the first and second sets of conductive traces are formed of one or more of aluminum, copper, gold, and silver.

13. A method of manufacturing a capacitive touch screen panel, the method comprising:

depositing at least one conductive layer on a first side of a transparent substrate;

removing selected portions of the at least one conductive layer;

depositing at least one transparent conductive layer on the first side of the transparent substrate; and

removing selected portions of the at least one transparent conductive layer, wherein the steps of removing retain an electrical connection between the at least one conductive layer and the at least one transparent conductive layer.

14. The method of claim 13, wherein the depositing at least one conductive layer comprises depositing at least one conductive layer via vacuum deposition.

15. The method of claim 14, wherein the depositing at least one transparent conductive layer comprises depositing at least one transparent conductive layer via vacuum deposition.

16. The method of claim 13, wherein the removing selective portions of the at least one conductive layer produces a plurality of conductive traces separated by spaces, and wherein a trace width of each of the conductive traces is less than 80 μ

m, and wherein a space width of each of the spaces is less than 80 μ

m

17. The method of claim 13, further comprising patterning the at least one transparent conductive layer.

18. The method of claim 13, wherein the transparent conductive layer comprises an indium tin oxide (ITO) layer.

19. The method of claim 13, wherein the conductive layer is formed of one or more of aluminum, copper, gold, and silver.

20. A capacitive touch sensor, comprising:

a transparent substrate having a transparent conductive layer disposed adjacent to a surface thereof; and

a set of conductive traces disposed on the first transparent substrate, wherein the conductive traces are in conductive communication with the transparent conductive layer, and wherein the conductive traces are deposited using electro deposition or vacuum deposition.

21. The capacitive touch sensor of claim 20, wherein the transparent conductive layer is patterned.

22. The capacitive touch sensor of claim 20, wherein conductive traces electrically connect with a bottom surface of the transparent conductive layer.