Patent ID: 8592874

Claim:
A solid state imaging device comprising: a plurality of pixels arranged in an array pattern, wherein each of the pixels includes: a photoelectric conversion element which is formed with a first conductivity type diffusion region formed in a substrate, and an amplifier transistor, an insulating isolation part electrically isolates the photoelectric conversion elements adjacent to each other, the insulating isolation part constitutes at least a first region between the photoelectric conversion elements where the amplifier transistor is not arranged, and a second region between the photoelectric conversion elements where the amplifier transistor is arranged, a second conductivity type isolation diffusion layer is formed below the insulating isolation part, the isolation diffusion layer formed below the insulating isolation part constituting the first region is formed with a first isolation diffusion layer having a first impurity concentration, the first isolation diffusion layer is formed between the photoelectric conversion elements, the isolation diffusion layer formed below the insulating isolation part constituting the second region is formed with a second isolation diffusion layer having a second impurity concentration, the second diffusion layer is formed between the photoelectric conversion elements, and the first isolation diffusion layer formed below the second isolation diffusion layer, the second impurity concentration being higher than the first impurity concentration, and the amplifier transistor is disposed in the second isolation diffusion layer.