Patent ID: 7816755

Claim:
A photoelectric conversion device comprising: a plurality photoelectric conversion regions, each including a first impurity region of a first conductivity type and a second impurity region of a second conductivity type operating as a signal acquisition region arranged in the first impurity region, a plurality of amplifying transistors for each of the plurality of photoelectric conversion regions, respectively, a third impurity region of the first conductivity type, and a fourth impurity region of the first conductivity type, wherein for at least one of the plurality of photoelectric conversion regions, in a plane parallel to a light receiving surface of the photoelectric conversion region, the first impurity region is surrounded by the third impurity region and the fourth impurity region, the fourth impurity region is disposed between the second impurity region in the first impurity region surrounded by the third and fourth impurity regions and another second impurity region adjacent the second impurity region, and an impurity concentration of the fourth impurity region is smaller than an impurity concentration of the third impurity region.