Patent ID: 7948048

Claim:
A solid-state imaging device comprising: a photodiode provided in a semiconductor substrate; and a transfer electrode provided on the semiconductor substrate via an insulation layer, wherein the semiconductor substrate comprises: a first semiconductor region of a first conductivity type formed with a first impurity; a second semiconductor region of a conductivity type opposite to the first conductivity type; and a third semiconductor region of the first conductivity type in a position that overlaps a region of the semiconductor substrate directly underneath the transfer electrode, the second semiconductor region is formed on the first semiconductor region as a channel portion that reads out an electric charge generated in the photodiode, and the third semiconductor region is a p-type region formed on the second semiconductor region, in a vicinity of an interface between the semiconductor substrate and the insulation layer by using a second impurity of at least one material selected from the group consisting of indium, gallium and thallium, each having a larger atomic radius and having a lower speed of diffusion induced by heat in comparison with, those of the first impurity, wherein the solid-state imaging device has a buried channel-type MOS transistor, and the second impurity is carried out by ion-implantation, and an acceleration energy is set in a range between 60 keV and 150 keV, and a dose is set in a range between 1×10 12 ions/cm 2 and 8×10 12 ions/cm 2 , during the ion-implantation.