Patent ID: 7150516

Claim:
A fluid ejection device comprising: a substrate comprising a first surface having at least one non-doped region; a first insulative material disposed on at least a portion of the first surface, the first insulative material comprising a plurality of openings formed to the first surface; a first conductive material disposed on the first insulative material, the first conductive material being disposed so that the plurality of openings are substantially free of the first conductive material; a second insulative material disposed on the first conductive material and portions of the first insulative material, the second insulative material being disposed so that the plurality of openings are substantially free of the second insulative material; a second conductive material being disposed on second insulative material and within plurality of openings so that some of the second conductive material disposed upon the second insulative material is in electrical contact with the at least one non-doped region on the substrate; a plurality of chambers formed in a material on the surface of the substrate; and a plurality of openings formed to allow passage of a fluid from the chambers out through the plurality of openings.