An imaging device formed as a CMOS semiconductor integrated circuit
includes a doped polysilicon contact line between the floating diffusion
region and the gate of a source follower output transistor. The doped
polysilicon contact line in the CMOS imager decreases leakage from the
diffusion region into the substrate which may occur with other techniques
for interconnecting the diffusion region with the source follower
transistor gate. Additionally, the CMOS imager having a doped polysilicon
contact between the floating diffusion region and the source follower
transistor gate allows the source follower transistor to be placed closer
to the floating diffusion region, thereby allowing a greater photo
detection region in the same sized imager circuit.