Patent ID: 7755118
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. A solid-state image pick-up device comprising: a photoelectric conversion section; a signal amplifying section; a floating diffusion for inputting a signal from said photoelectric conversion section into said signal amplifying section, wherein said floating diffusion has a direct contact to a polysilicon material, a connection path from said floating diffusion to said signal amplifying section is formed by the direct contact to the polysilicon material, and said floating diffusion is shaded by a metal layer that is closest to said floating diffusion but that is not electrically connected with said floating diffusion; a transfer MOS transistor for transferring a signal from said photoelectric conversion section to said floating diffusion, wherein said transfer MOS transistor has a gate electrode; and a potential barrier disposed between said photoelectric conversion section and said floating diffusion, said potential barrier being arranged under the gate electrode of said transfer MOS transistor, wherein said photoelectric conversion section has a first portion and a second portion having a same conductivity type as that of said floating diffusion and having an impurity concentration lower than that of said floating diffusion.