Friday, May 22, 2009

US Patent 7535462 - SWCNT touchscreen

This patent from Kodak teaches a touchscreen interface based on single walled carbon nanotubes having high transparency, low surface electrical resistivity, flexibility, and robustness under repeated contacts. Claim 1 reads:

1. A touchscreen comprising:

touch side electrode and device side electrode

wherein each electrode comprises an insulating substrate and an exposed electrically conductive layer,

wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers,

wherein only one of the exposed electrically conductive layers comprises carbon nanotubes wherein said carbon nanotubes comprise single-wall carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species.