Patent ID: 7586139

Claim:
An imaging sensor comprising: a pixel array, each pixel comprising: a semiconductor island of a first conduction type, a dielectric layer; an isolation well of a second conduction type in one surface of said semiconductor layer, said second conduction type being opposite said first conduction with said isolation well forming a photo-sensor on said one surface with said semiconductor layer, the other surface of said semiconductor island being at and adjacent to said dielectric layer, cell wiring to said cell extending from photo-sensor structures in said one surface, and a color filter separated from said semiconductor layer by said dielectric layer; a trench to said dielectric layer surrounding each said semiconductor island; and a protective layer on said pixel array at pixel color filters, an optical signal passing through said protective layer, through said dielectric layer and then, through said semiconductor island to said photo-sensor, being filtered by said color filters and causing current flow across said semiconductor island and said isolation well junction selectively sensed by a corresponding said photo-sensor.