Patent ID: 8233063
Filing Date: 2012-07-31
Classification: G06K

Abstract:
1. A solid-state image pickup device comprising: a semiconductor substrate having a front surface and a rear surface; a photo detective layer formed in said semiconductor substrate at a side of said front surface and detecting a light entering through said rear surface, said photo detective layer having: a first region having a first conductive type; a plurality of second regions having a second conductive type opposite to said first conductive type, each of said second regions constituting a photo diode and being separated from each other by said first region; said plurality of second regions having a top surface that is positioned at a side of said front surface and a bottom surface that is positioned at a side of said rear surface; and a third region contacting said bottom surface of one of said second regions and having said first conductive type, said third region being lower in impurity density than said first region.