Patent ID: 6960795

Claim:
A pixel sensor cell for use in an imaging device, said pixel sensor cell comprising: a substrate; a first gate oxide layer formed over at least a portion of said substrate; a first gate formed over said first gate oxide layer, said first gate comprising a first conductive layer formed over said first gate oxide layer, an insulating layer formed over the first conductive layer, a barrier metal layer formed over the first conductive layer, and insulating spacers formed on the sides of said first gate; a second gate oxide layer separate from said first gate oxide layer formed over at least a portion of said substrate, wherein said second gate oxide layer is adjacent to an insulating spacer of said first gate and adjacent to said first gate oxide layer; and a second gate formed over said second gate oxide layer, said second gate comprising a second conductive layer formed over said second gate oxide layer and extending at least partially over said first gate.