Patent ID: 8466532
Filing Date: 2013-06-18
Classification: H01L

Abstract:
1. A photoelectric conversion apparatus comprising: a semiconductor substrate; a first semiconductor region of a first conductivity type being arranged in the semiconductor substrate, and including a part of a photoelectric conversion element; a second semiconductor region of the first conductivity type being arranged in the semiconductor substrate, and configured to hold an electric charge generated in the first semiconductor region; a gate electrode being arranged on the semiconductor substrate, and configured to transfer the electric charge from the second semiconductor region; a third semiconductor region of the first conductivity type being arranged in the semiconductor substrate, wherein the electric charge is transferred by the gate electrode to the third semiconductor region; an element isolation region, for defining a first active region, being arranged in the semiconductor substrate and having an insulator; a fourth semiconductor region being arranged along a side wall of the element isolation region in the semiconductor substrate for suppressing a dark current from the element isolation region; and a second gate electrode arranged on a region between the first and second semiconductor regions, wherein the second semiconductor region is arranged in the first active region, and has an interface with at least a part of the fourth semiconductor region, and wherein a part of the element isolation region extends from a reference surface including a light receiving surface of the photoelectric conversion element into the semiconductor substrate at a depth equal to or deeper than a depth of the second semiconductor region.