Patent ID: 6639261
Filing Date: 2003-10-28
Classification: H01L,H04N

Abstract:
An imaging device comprising:a substrate; a photosensitive area within said substrate for accumulating photo-generated charge in said area; a floating diffusion region in said substrate for receiving charge from said photosensitive area, said floating diffusion region being doped to a first conductivity type at a first concentration; a readout circuit comprising at least an output transistor formed in said substrate; an insulating layer formed over said substrate; a doped polysilicon conductor formed in said insulating layer for connecting said floating diffusion region with a gate of said output transistor, said doped polysilicon conductor being doped to said first conductivity type; and a contact region between said doped polysilicon conductor and said floating diffusion region, said contact region being in diffusible communication with said polysilicon conductor, and said contact region comprising dopants of said first conductivity type at said first concentration, and diffused dopants of said first conductivity type from said doped polysilicon conductor.