Patent ID: 8441619
Filing Date: 2013-05-14
Classification: H01L

Abstract:
1. A photodetector comprising: a semiconductor substrate; a photoelectric converting portion formed in said semiconductor substrate to generate electric charges corresponding to a received light amount; a charge separating portion having a separation electrode formed on a general surface of said semiconductor substrate; a charge accumulating portion having an accumulation electrode formed on the general surface of said semiconductor substrate; a barrier electrode formed on the general surface of said semiconductor substrate between said separation electrode and said accumulation electrode; a barrier-height adjusting portion electrically connected to said barrier electrode; and a charge discarding portion; the effective electric charges accumulated in said charge accumulating portion are provided as an output of the photodetector, wherein said barrier electrode is formed on said semiconductor substrate through an insulating layer, said photoelectric converting portion, said charge separating portion, said barrier electrode and said charge accumulating portion are aligned in a row, and said barrier-height adjusting portion and said charge discarding portion are provided at one side of said row such that said barrier-height adjusting portion is positioned adjacent to said charge separating portion, and said charge discarding portion is positioned adjacent to said photoelectric converting portion.