Photoelectric conversion device and image capturing system

摘要

A photoelectric conversion device includes an isolation portion defining an active region, a photoelectric converter arranged in the active region and including a charge accumulation region containing an impurity of a first conductivity type, a charge voltage converter arranged in the active region, and a transfer electrode arranged on the active region and configured to form a channel to transfer charges generated by the photoelectric converter to the charge voltage converter. In addition, a first semiconductor region is arranged in the active region between the photoelectric converter and the charge voltage converter and is covered with the transfer electrode and contains the impurity of the first conductivity type at a concentration lower than that in the charge accumulation region. A second semiconductor region extends in the active region along an interface of the isolation portion facing at least the first semiconductor region and is of a second conductivity type.