Patent ID: 8400541
Filing Date: 2013-03-19
Classification: H01L

Abstract:
1. A photoelectric conversion apparatus comprising: a semiconductor substrate having a main surface; a first semiconductor region of a first conductivity type forming a part of a photoelectric conversion element; a second semiconductor region of a second conductivity type opposite to the first conductivity type being stacked on the first semiconductor region, and forming a part of the photoelectric conversion element; a third semiconductor region of the first conductivity type to which a signal charge transferred from the photoelectric conversion element; a fourth semiconductor region of the first conductivity type having an impurity concentration higher than that of the first semiconductor region, being arranged between the first and third semiconductor region and being arranged between the second and third semiconductor regions, and being connected to the first semiconductor region, wherein the bottom of the fourth semiconductor region is closer to the main surface than that of the first semiconductor region; a first gate electrode arranged over the fourth semiconductor region, an insulating film arranged on the main surface and arranged between the first gate electrode and the fourth semiconductor region; and a second gate electrode arranged between the third and fourth semiconductor regions, and arranged over the insulating film.