Patent ID: 8089543

Claim:
A solid-state image pickup element comprising: a semiconductor layer of a first conductivity type; a pixel area having pixels formed in a matrix form, each of the pixels including a photoelectric conversion element having a pn junction formed of the semiconductor layer of the first conductivity type and a first semiconductor region of a second conductivity type different from the first conductivity type, a second semiconductor region of the first conductivity type formed on a first surface side of the semiconductor layer, and potential control wiring connected electrically to the second semiconductor region; and a pixel signal readout circuit including at least one MOS transistor formed on the first surface side of the semiconductor layer in the pixel area to have a source and a drain formed of an impurity region of the second conductivity type, wherein the first semiconductor region is disposed so as to be adjacent to the impurity region of the second conductivity type in the MOS transistor with interposing the semiconductor layer therebetween, and incidence of light to the photoelectric conversion element is made from a second surface side opposite to the first surface side.