Patent ID: 7593004

Claim:
A touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, a first electrically conductive layer in contact with said substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein at least the first electrically conductive layers or the exposed electrically conductive layers comprise carbon nanotubes, wherein said carbon nanotubes comprise covalently attached hydrophilic species comprising carboxylic acid or carboxylic acid salt, or mixtures thereof, or a sulfur-containing group selected from: SO x Z y Wherein x ranges from 1-3 and Z may be a Hydrogen atom or a metal cation of such metals as Na, Mg, K, Ca, Zn, Mn, Ag, Au, Pd, Pt, Fe, Co and y may range from 0 or 1.