Neal Curtis Oldham

US Patent:

20100141608, Jun 10, 2010

Filed:

Dec 9, 2008

Appl. No.:

12/331430

Inventors:

Lili HUANG - San Jose CA, US
Shih Chang Chang - Cupertino CA, US
Neal Oldham - San Jose CA, US
Steve Porter Hotelling - San Jose CA, US
John Z. Zhong - Cupertino CA, US
Chun-Hao Tung - Tapei City, TW

International Classification:

G06F 3/041

US Classification:

345178

Abstract:

Index matching for touch screens is provided. An index matching stackup for a touch screen can be formed including a substantially transparent substrate, a substantially transparent conductive layer disposed in a pattern, and an index matching layer for improving an optical uniformity of the touch screen. The index matching layer can also be designed to operate as a dual-function layer. In one dual-function design, the index matching layer design performs both index matching and passivating the conductive layer. In another dual-function design, the index matching layer performs both index matching and adhesion of layers. The index matching layer can also be designed to serve all three functions of index matching, passivating, and adhering.