Patent ID: 8089109

Claim:
A Photoelectric conversion device comprising: a first semiconductor region having a first conductive type; a second semiconductor region and a third semiconductor region, both having a second conductive type and arranged in the first semiconductor region; a fourth semiconductor region having the first conductive type and arranged in the third semiconductor region; and a fifth semiconductor region having the second conductive type and arranged in the fourth semiconductor region, wherein the first semiconductor region and the second semiconductor region constitute a first photodiode, and a junction surface between the first semiconductor region constituting an anode of the first photodiode and the second semiconductor region constituting a cathode of the first photodiode has a first depth for photoelectric conversion to light existing in a medium wavelength band and entering from a surface of the first semiconductor region, wherein the fourth semiconductor region and the third semiconductor region constitute a second photodiode, and a junction surface between the fourth semiconductor region constituting an anode of the second photodiode and the third semiconductor region constituting a cathode of the second photodiode has a second depth for photoelectric conversion to light existing in a long wavelength band and entering from a surface of the first semiconductor region, and wherein the fourth semiconductor region and the fifth semiconductor region constitute a third photodiode, and a junction surface between the fourth semiconductor region constituting an anode of the third photodiode and the fifth semiconductor region constituting a cathode of the third photodiode has a third depth for photoelectric conversion to light existing in a short wavelength band and entering from a surface of the first semiconductor region.