Patent ID: 8754452

Claim:
A solid-state imaging device comprising: a substrate having oppositely facing first and second surfaces; a plurality of pixels in a pixel area of the substrate, each pixel have a corresponding photoelectric conversion unit in the substrate and configured to receive light and generate signal charge; and for each pixel, pixel transistors configured to output the signal charge generated by the photoelectric conversion unit as an electrical signal, each of the pixel transistors being provided on the second surface of the semiconductor substrate opposite the first surface, wherein the first surface of the substrate is a light receiving surface, wherein, each of the pixel transistors includes at least a transfer transistor that transfers the signal charge generated in the photoelectric conversion unit of the corresponding pixel to a floating diffusion, and a gate electrode of the transfer transistor is formed in such a manner as to extend with a gate insulating film from the floating diffusion to over the photoelectric conversion unit with the gate insulating film between the gate electrode and the second surface, wherein a first portion of the gate electrode includes an impurity of a first conduction type, and wherein a second portion of the gate electrode includes an impurity of a second conduction type.