Patent ID: 8716719

Claim:
A solid-state imaging device comprising: a first conductivity type substrate; a second conductivity type well at a surface side of the first conductivity type substrate; a photoelectric conversion area in the second conductivity type well to convert incident light to charges; a first conductivity type charge retaining area in the second conductivity type well to retain the charges output from the photoelectric conversion area until the charges are read out, the first conductivity type charge retaining area being separate from the photoelectric conversion area; a charge voltage conversion area in the second conductivity type well to convert the charges retained in the charge retaining area to a voltage; and a first conductivity type layer area that is separate from the photoelectric conversion area and the first conductivity type charge retaining area, the first conductivity type layer area being configured as a first conductivity type region having a convex shape such that the first conductivity type region protrudes from a boundary between the first conductivity type substrate and the second conductivity type well to a predetermined position under at least a portion of the first conductivity type charge retaining area, wherein, the first conductivity type layer area is provided as a portion of the first conductivity type substrate that protrudes upwards under at least the portion of the first conductivity type charge retaining area and has a lower concentration of a first conductivity type impurity than the first conductivity type substrate.