According to the present embodiment, because no element isolation regions by {TAIL ~ the LOCOS} is arranged between the well electrode 101 and the light receiving unit of {HEAD ~ the photodiode} 102, it becomes unnecessary to form any offset region for suppressing the dark current 
According to the present embodiment , because no element isolation regions by { TAIL ~ the LOCOS } is arranged between the well electrode 101 and the light receiving unit of { HEAD ~ the photodiode } 102 , it becomes unnecessary to form any offset region for suppressing the dark current
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH