Patent ID: 7791159
Filing Date: 2010-09-07
Classification: H01L

Abstract:
1. A solid-state imaging device comprising: an imaging region having a plurality of light receiving portions arranged two-dimensionally and for generating signal electric charges by photoelectric conversion; a peripheral circuit region formed in an outer peripheral portion of the imaging region; a first conductivity type semiconductor substrate having the imaging region and the peripheral circuit region on a main surface thereof; a second conductivity type first semiconductor layer formed in the first conductivity type semiconductor substrate; a first conductivity type second semiconductor layer formed in first semiconductor layer; a through electrode formed in a through hole penetrating through the semiconductor substrate in a thickness direction of the semiconductor substrate; a pad portion formed on the semiconductor substrate and connected to the through electrode, and a first conductivity type third semiconductor layer that is adjacent to the first semiconductor layer covering the second semiconductor layer and electrically connected via the pad portion to the through electrode, and is formed in at least a region between the first semiconductor layer and the through hole, in a surface layer portion of the semiconductor substrate, wherein the through hole penetrates through a first conductivity type region of the semiconductor substrate, and the third semiconductor layer is a region having a higher impurity concentration than that of the semiconductor substrate.