Patent ID: 7170143
Filing Date: 2007-01-30
Classification: G01T,H01L

Abstract:
1. A semiconductor photodetector comprising a semiconductor substrate formed with a plurality of pn junction type photodiodes on a side of the semiconductor substrate opposite from an incident surface of the semiconductor substrate for receiving light to be detected; wherein a separate region including a pn junction, which is separate from the photodiodes, is formed between photodiodes adjacent each other in the plurality of photodiodes on the side of the semiconductor substrate opposite from the incident surface; a high-concentration impurity semiconductor region having the same conductivity type as that of the semiconductor substrate is formed between the separate region and the photodiode on the opposite side of the semiconductor substrate; the high-concentration impurity semiconductor region is formed so as to surround the photodiode as seen from the opposite side; an electrode electrically connected to the separate region and high-concentration impurity semiconductor region is formed on the opposite side of the semiconductor substrate; and the electrode is connected to a ground potential.