Patent ID: 7696592

Claim:
A solid state imaging apparatus comprising: a photoelectric conversion section formed in an imaging area of a silicon substrate, the photoelectric conversion section including: a surface layer having a first conductivity type provided on a top portion of the silicon substrate, a first semiconductor layer made of silicon having a second conductivity type, serving as a charge accumulation region, and provided under the surface layer, and a second semiconductor layer made of silicon having the first conductivity type provided under the first semiconductor layer; an isolation region formed in at least one part of the silicon substrate located around the photoelectric conversion section, the isolation region being made of a silicon film which fills an isolation trench formed on the semiconductor substrate; a first silicon layer made of silicon having the first conductivity type formed in a region of the silicon substrate, and forming the bottom and sidewalls of the isolation trench; and a second silicon layer made of silicon having the first conductivity type in contact with a bottom side of the first silicon layer, wherein an impurity concentration of the second silicon layer is less than that of the first silicon layer, wherein the photoelectric conversion section is in contact with the isolation region, the first silicon layer, and the second silicon layer, and the second silicon layer is in physical contact with a side surface of the first semiconductor layer.