Patent ID: 7078751
Filing Date: 2006-07-18
Classification: H01L

Abstract:
1. A solid-state imaging device in which a plurality of pixels each comprised of a photodiode and a transistor are arranged on a surface of a semiconductor substrate, said plurality of pixels including light-receiving pixels having light incident on the respective photodiodes thereof and shaded pixels having no light incident on the respective photodiodes thereof, and in which a black reference level is obtained on the basis of an output signal from said shaded pixels, wherein a lower side of each of the photodiodes of said shaded pixels facing the semiconductor substrate is covered with an impurity layer having a conductivity type identical to that of the semiconductor substrate and has a concentration higher than that of the semiconductor substrate, and a lower side of each of the photodiodes of said light-receiving pixels facing the semiconductor substrate is in direct contact with the semiconductor substrate.