Patent ID: 6765246
Filing Date: 2004-07-20
Classification: H01L

Abstract:
A solid-state imaging device, comprising:a semiconductor substrate, a plurality of photoelectric conversion regions arrayed in the vertical direction and the horizontal direction on the surface of the substrate, and an electric charge transfer region disposed between the photoelectric conversion regions adjacent in the horizontal direction of the substrate; wherein the substrate comprises a n-type semiconductor substrate, a first p-type impurity region formed on the n-type semiconductor substrate, a semiconductor region formed on the first p-type impurity region, and a second p-type impurity region disposed below the electric charge transfer region; the semiconductor region is one of an n-type impurity region having a concentration lower than that of the semiconductor substrate, a p-type impurity region having a concentration lower than that of the first p-type impurity region, and a non-doped region; the photoelectric conversion region and the electric charge transfer region are n-type impurity regions formed on the surface portion of the semiconductor region; and a third p-type impurity region is formed in at least one region selected from the group consisting of a region located between the photoelectric conversion regions adjacent in the vertical direction and a region located below the second p-type impurity region between the photoelectric conversion regions adjacent in the horizontal direction in the semiconductor region, wherein a maximal value point in the distribution of the p-type impurity concentration in the depth direction of the substrate of the third p-type impurity region is present in a portion closer to the surface portion from a middle portion of the third p-type impurity region.