Patent ID: 8164668

Claim:
A photoelectric conversion device comprising: an isolation portion defining an active region in a semiconductor substrate; a photoelectric converter arranged in the active region and including a charge accumulation region, the charge accumulation region containing an impurity of a first conductivity type and being capable of accumulating signal charges; a charge voltage converter arranged in the active region; 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; a first semiconductor region arranged in the active region between the photoelectric converter and the charge voltage converter, the first semiconductor region being covered with the transfer electrode and containing the impurity of the first conductivity type at a concentration lower than that in the charge accumulation region; and a second semiconductor region extending in the active region along an interface of the isolation portion facing at least the first semiconductor region, the second semiconductor region being of a second conductivity type opposite to the first conductivity type, wherein the first semiconductor region includes a first portion, and a second portion which is adjacent to the first portion on a side of the photoelectric converter and wider in a direction of channel width of the transfer electrode than the first portion, and the second semiconductor region includes a third portion extending in a direction of channel length of the transfer electrode between the first portion and the isolation portion, and a fourth portion extending in the direction of channel width of the transfer electrode between the second portion and the isolation portion.