Patent ID: 7473944

Claim:
A solid-state imaging device comprising a semiconductor substrate including: a gate insulation film formed on the semiconductor substrate; a plurality of light-receptive portions that are arranged one-dimensionally or two-dimensionally; a vertical transfer portion that transfers signal electric charge read out from the light-receptive portions in a vertical direction; a horizontal transfer portion beneath the gate insulation film that transfers the signal electric charge transferred by the vertical transfer portion in a horizontal direction; a barrier region adjacent to the horizontal transfer portion and beneath the gate insulation film, the barrier region letting only surplus electric charge of the horizontal transfer portion pass therethrough; a drain region adjacent to the barrier region, into which the surplus electric charge passing through the barrier region is discharged; a first insulation film adjacent to the drain region; and a boundary region formed between the gate insulation film and the first insulation film, wherein the drain region extends from a point beneath the first insulation film and the boundary region and to the barrier region.