Patent ID: 7776643

Claim:
A manufacture method for a solid state image pickup device comprising steps of: (a) implanting, into a whole surface of a semiconductor substrate of a first conductivity type, impurity ions of a second conductivity type opposite to the first conductivity type, to form an overflow barrier region; (b) implanting impurity ions of the second conductivity type into said semiconductor substrate above said overflow barrier region to form a first pixel separation impurity layer; (c) epitaxially growing a semiconductor layer on said semiconductor substrate to form an epitaxial substrate; (d) implanting impurity ions of the second conductivity type into said epitaxial substrate above said first pixel separation impurity layer to form a channel protective impurity layer surrounding a region where a charge accumulation region is to be formed; (e) implanting impurity ions of the first conductivity type into said epitaxial substrate above said channel protective impurity layer to form vertical transfer channels; (f) forming vertical transfer electrodes above said vertical transfer channel; and (g) implanting impurity ions of the first conductivity type into said epitaxial substrate in a region surrounded by said channel protective impurity layer to form the charge accumulation region, a peak position of an impurity concentration in said overflow barrier region being eventually set to a depth of 3 μm or deeper from a surface of said epitaxial substrate.