Patent ID: 7638355

Claim:
A method of producing a solid state image pickup device comprising a semiconductor substrate having an image pickup pixel portion with a plurality of pixels each comprising a photo-electric conversion device and a field effect transistor and a peripheral circuit portion comprising a driving circuit for driving said image pickup pixel portion and a signal processing circuit for processing a pixel signal output from said image pickup pixel portion, a wiring layer for driving said field effect transistors in said image pickup pixel portion, said wiring layer being provided on a first side of said semiconductor substrate, and a light-receiving surface of said photo-electric conversion device being provided on a second side of said semiconductor substrate, wherein the method comprises the steps of: forming a registration mark during formation of an active region or a gate layer for said field effect transistors arranged on said first side of said semiconductor substrate, and thereafter placing one or more devices formed on said second side in subsequent processing with reference to said registration mark; further comprising forming a sample and hold circuit for receiving signal output during all read-out time.