Patent ID: 8907387
Filing Date: 2014-12-09
Classification: H01L

Abstract:
1. A solid-state imaging device comprising: a semiconductor substrate; a photodiode provided in the semiconductor substrate and comprising an N-type region and a first P-type region; a floating diffusion region provided in the semiconductor substrate to hold charges transferred from the photodiode; and a transfer transistor provided on the semiconductor substrate to transfer charges stored in the photodiode to the floating diffusion region, wherein the N-type region of the photodiode comprises a first semiconductor region and a second semiconductor region formed shallower than the first semiconductor region, an end portion of the first semiconductor region is positioned on the floating diffusion region side rather than an end portion of a gate electrode of the transfer transistor, and an end portion of the second semiconductor region is set in substantially the same position as that of the end portion of the gate electrode of the transfer transistor, and a region above the end portion of the first semiconductor region and on the floating diffusion region side of the end portion of the second semiconductor region is a second P-type region of the semiconductor substrate.