Patent ID: 6486498
Filing Date: 2002-11-26
Classification: H01L

Abstract:
A solid-state imaging device comprising:a semiconductor substrate including a surface region of a second conductivity type; and a plurality of unit pixels arranged in a matrix form on the surface region of the second conductivity type, the plurality of unit pixels forming an imaging area and each of the plurality of unit pixels including a first semiconductor region of a first conductivity type formed in a position separated by a preset distance from a surface of the surface region in a depth direction of the surface region and accumulates signal charges obtained by photo-electrical conversion of input light, a gate electrode formed adjacent to the first semiconductor region above the surface region and controls readout of the signal charges accumulated in said first semiconductor region, end portions of the gate electrode and the first semiconductor region which substantially face each other being formed in positions separated by a preset distance in a horizontal direction, and a second semiconductor region of the first conductivity type formed in a channel region lying on the surface region and below the gate electrode and controls a threshold voltage of the gate electrode, wherein the second semiconductor region is formed in a portion of the channel region lying below the gate electrode except a partial region thereof which lies on a side of the first semiconductor region.