Patent ID: 6207981
Filing Date: 2001-03-27
Classification: H01L

Abstract:
A charge-coupled device comprising:a first conductivity-type semiconductor layer;a charge transfer electrode formed over said first conductivity-type semiconductor layer; anda potential barrier region and a charge storage region formed in said first conductivity-type region underneath said charge transfer electrode, wherein said potential barrier region is formed by implanting impurities of a conductivity type opposite to that of said first conductivity-type semiconductor layer, andwhereinsaid charge storage region is formed in such a manner that the cross area of said charge storage region at a point a distance x in a charge transfer direction from the boundary between said potential barrier region and said charge storage region is a monotone increasing function when said charge storage region is cut perpendicularly to the charge transfer direction, and the boundary surface between said potential barrier region and said charge storage region has a W-shaped surface.