Patent ID: 8653619

Claim:
A range sensor comprising: a semiconductor substrate having a first surface and a second surface opposite to the first surface and having a photosensitive region disposed in the first surface side of the semiconductor substrate, the photosensitive region generates charge according to incident light; a first conductivity type semiconductor region disposed in the first surface side of the semiconductor substrate and configured to accumulate charge generated in the photosensitive region; an electrode provided on the first surface and configured to transfer charge generated in the photosensitive region to the semiconductor region; and a second conductivity type semiconductor region located between the first conductivity type semiconductor region and the second surface in the semiconductor substrate and formed so as to cover the first conductivity type semiconductor region, when viewed from the direction perpendicular to the second surface, the second conductivity type semiconductor region has a conductivity type opposite to that of the first conductivity type semiconductor region, wherein the first conductivity type semiconductor region is provided so as to be surrounded by the photosensitive region.