Patent ID: 8084837
Filing Date: 2011-12-27
Classification: H01L

Abstract:
1. A solid-state image pickup device comprising: a channel region of a first conductivity-type between a photoelectric converting region of a second conductivity-type and a floating diffusion part of the second conductivity-type, a portion of a wiring layer being between a gate electrode and said channel region; wherein said floating diffusion part and said photoelectric converting region have differing dopant concentrations of the second conductivity-type, said dopant concentration for the floating diffusion part being greater than said dopant concentration for the photoelectric converting region; wherein the photoelectric converting device is configured to generating a signal charge corresponding to an amount of light, an output of said signal charge from said photoelectric converting region to said floating diffusion part being controllable by said gate electrode; wherein said light is transmissible through a light incidence plane into an epitaxial layer, said epitaxial layer between said wiring layer and said light incidence plane; wherein a dopant concentration of the first conductivity-type for said epitaxial layer decreases along a direction from said light incidence plane toward said wiring layer.