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