Index Matching For Touch Screens

A method of manufacturing an index matching stackup for a touch screen, the method comprising:

• forming a substantially transparent conductive layer on a substantially transparent substrate;
• patterning the conductive layer to form one of a plurality of drive lines and a plurality of sense lines;
• and
• forming an index matching layer with the patterned conductive layer and the substrate for improving an optical uniformity of the touch screen.

A method of manufacturing a touch screen, the method comprising:

• forming an index matching layer on a substantially transparent substrate;
• forming a substantially conductive layer on the index matching layer;
• and
• patterning the conductive layer to form one of a plurality of drive lines and plurality of sense lines.

An index matching stackup for a touch screen, the stackup comprising:

• a substrate;
• a substantially transparent conductive layer formed in a pattern on the substrate;
• and
• a pressure sensitive adhesive that matches an index of refraction of the conductive layer to reduce a visibility of the pattern.

A mobile telephone including an index matching stackup comprising:

• a substantially transparent substrate;
• a substantially transparent conductive layer disposed over the substrate in a pattern;
• and
• an index matching layer disposed over the conductive layer for improving an optical uniformity of the touch screen, wherein the index matching layer also passivates the conductive layer.

A digital media player including an index matching stackup comprising:

• a substantially transparent substrate;
• a substantially transparent conductive layer disposed over the substrate in a pattern;
• and
• an index matching layer disposed over the conductive layer for improving an optical uniformity of the touch screen, wherein the index matching layer also passivates the conductive layer.

A personal computer including an index matching stackup comprising:

• a substantially transparent substrate;
• a substantially transparent conductive layer disposed over the substrate in a pattern;
• and
• an index matching layer disposed over the conductive layer for improving an optical uniformity of the touch screen, wherein the index matching layer also passivates the conductive layer.