Patent ID: 7030919

Claim:
A solid state image pick-up device comprising a semiconductor substrate, and a photo detective region formed in one surface region of said semiconductor substrate, wherein light incident on an object on another surface of said semiconductor substrate enters an inner portion of said semiconductor substrate, said photo detective region collects signal electric charges that are generated in said inner portion of said semiconductor substrate by said incident light and said signal electric charges are outputted to be converted to an image of said object, and wherein said semiconductor substrate has one conduction type, a photo detective diffusion layer constituting said photo detective region has another conduction type opposite to said one conduction type, said photo detective diffusion layer has a barrier layer having said one conduction type between said photo detective diffusion layer and another photo detective diffusion layer adjacent thereto, and said photo detective diffusion layer contacts a diffusion layer having said one conduction type at a bottom portion of said photo detective diffusion layer.