Touch screen with resistive electrode
A touch screen includes a resistive layer made from conductive ink and overlying at least a portion of a substrate. The resistive layer has a sheet resistance of 1,000-5,000 Ω/ In one embodiment of the invention, the touch screen is transparent. The touch screen also includes a patterned conductive layer for linearizing current and an insulating layer overlying the patterned conductive layer and the resistive layer.
1 . A touch screen comprising:
a substrate;
a resistive layer overlying at least a portion of said substrate;
wherein said resistive layer is a cured, conductive ink having a sheet resistance of 1,000-5,000 Ω/
a patterned, conductive layer overlying said resistive layer; and
an insulating layer overlying said resistive layer.
2 . The touch screen as set forth in claim 1 wherein said substrate, said resistive layer, and said insulating layer are transparent.
3 . The touch screen as set forth in claim 2 wherein said resistive layer is a resin containing particles of indium tin oxide.
4 . The touch screen as set forth in claim 1 wherein said resistive layer is a resin containing particles of indium tin oxide.
5 . The touch screen as set forth in claim 1 wherein said ink is heat curable.
6 . The touch screen as set forth in claim 1 wherein said ink is UV curable.
7 . The touch screen as set forth in claim 1 wherein said substrate is a UV curable resin.