Patent ID: 6414342
Filing Date: 2002-07-02
Classification: H01L

Abstract:
A pixel sensor cell for use in an imaging device, said cell comprising:a doped layer formed in a substrate; a first doped region formed in said doped layer; a stacked photogate provided over said first doped region, said stacked photogate comprising a doped polysilicon layer of a thickness within the range of 50 to 800 Angstroms, and a transparent conductive layer on the doped polysilicon layer, wherein the transparent conductive layer is a layer of material selected from the group consisting of indium tin oxide, indium oxide, and tin oxide; a second doped region for receiving image charge transferred from said first doped region; a reset transistor for periodically resetting said second doped region to a predetermined potential; and an output transistor having a gate electrically connected to the second doped region for providing a signal representing image charge transferred to said second doped region.