Patent ID: 8471261
Filing Date: 2013-06-25
Classification: H01L

Abstract:
1. A solid-state image pickup device photoelectrically converting light incident on a back surface of a semiconductor substrate into signal electric charges to image an object, the solid-state image pickup device comprising: a first semiconductor layer forming a part or whole of said semiconductor substrate and having a first resistivity; a second semiconductor layer provided on a front surface of said semiconductor substrate and having a second resistivity higher than said first resistivity; and a light receiving unit provided in said second semiconductor layer and receiving said signal electric charges produced by the photoelectric conversion, wherein a distance between a face of said first semiconductor layer on side of said second semiconductor layer and said back surface of said semiconductor substrate is not greater than an absorption length of said light used in image pickup, and wherein said light is in a range of visible light, and wherein a thickness of said first semiconductor layer is thicker than a thickness of said second semiconductor layer.