US Patent 7949159 Solid-state imaging device, imaging method and imaging system

A solid-state imaging device includes a semiconductor substrate, a light receiving portion, and a spacer. The solid-state imaging device photoelectrically converts light incident from an object to be imaged upon a light incidence surface in the light receiving portion provided in the semiconductor substrate, thereby acquiring an image of the object to be imaged based on a magnitude of an electric charge generated through the photoelectric conversion. On a part of the light incidence surface, the spacer is provided. The spacer prevents the object to be imaged from contacting the light incidence surface.