Patent ID: 8736005

Claim:
A photoelectric conversion device including a plurality of photoelectric conversion units, each including a plurality of photoelectric conversion elements and adding signals of the plurality of photoelectric conversion elements included in each of the photoelectric conversion units, wherein each of the plurality of photoelectric conversion elements includes a first semiconductor region of a first conductivity type for collecting a signal charge, wherein a second semiconductor region of a second conductivity type is arranged between the first semiconductor regions of the photoelectric conversion elements arranged adjacent to each other and included in the photoelectric conversion unit, wherein a third semiconductor region of the second conductivity type is arranged between the first semiconductor regions of the photoelectric conversion elements arranged adjacent to each other among the plurality of photoelectric conversion elements included in different photoelectric conversion units arranged adjacent to each other, and wherein an impurity concentration of the second conductivity type of at least a portion of the second semiconductor region is lower than an impurity concentration of the second conductivity type of the third semiconductor region.