Patent ID: 7151305

Claim:
A contact type image sensor unit comprising: a light source; an imaging device; and a photoelectric conversion device, said photoelectric conversion device comprising: a first-conductivity type first semiconductor region located in a pixel region; a second-conductivity type second semiconductor region provided in the first semiconductor region and capable of accumulating photoelectric carriers in a floating state, wherein said first and second semiconductor regions form a photodiode; a wiring for electrically connecting directly the second semiconductor region to a gate of an amplifying source follower MOS transistor located outside the pixel region; and a conductor maintained at a predetermined potential and disposed over one side of said wiring within the pixel region, wherein said wiring, an insulator, and said conductor are stacked in order from a side of the second semiconductor region so that said conductor does not contact said wiring, and the one side of said wiring is opposite to a side of said wiring at which said wiring is connected to said second semiconductor region.