Patent ID: 8536625

Claim:
An electronic image sensor comprising: a semiconductor substrate having a first substrate surface configured for accepting illumination to an image sensor pixel, the image sensor pixel being disposed in the substrate; an electrically-doped channel region disposed at a second substrate surface, the second substrate surface being opposite the first substrate surface, the electrically-doped channel region collecting photogenerated charge in the substrate at the pixel; an electrically-doped channel stop region provided at the second substrate surface at each edge of the electrically-doped channel region, each electrically-doped channel stop region being disposed under a field oxide region; an electrically-doped shutter buried layer disposed in the substrate at a first depth from the second substrate surface greater than a second depth from the second substrate surface at which the electrically-doped channel region is disposed, the electrically-doped shutter buried layer extending across the pixel; an electrically-doped photogenerated-charge-extinguishment layer at the first substrate surface and extending across the pixel, the electrically-doped photogenerated-charge-extinguishment layer having an electrical connection for electrical biasing of the electrically-doped photogenerated-charge-extinguishment layer; and a substrate bulk region, between the electrically-doped shutter buried layer and the electrically-doped photogenerated-charge-extinguishment layer, the substrate bulk region being characterized by an electrical resistivity that decouples electrical biasing of the electrically-doped photogenerated-charge-extinguishment layer from the electrically-doped channel stop regions, to independently set an electrical potential in the substrate bulk region.