Patent ID: 6627476
Filing Date: 2003-09-30
Classification: H01L

Abstract:
A method for forming a solid state imaging device comprising the steps of:providing a semiconductor substrate having a first conductivity type, adding a first layer having a second conductivity type opposite to said first conductivity type, providing a charge storing layer formed on said first layer by implanting ions of said first conductivity type, the charge storing layer being surrounded by an isolation region having said second conductivity type except for a first side of the charge storing layer, forming a second layer on said charge storing layer by implanting ions of said second conductivity type, so that said charge storing layer and said second layer form a photodiode, providing a charge transfer channel formed adjacent to the first side of said charge storing layer, said method comprising the additional step of implanting ions of the first conductivity type to form an additional implant in at least one region that overlaps only a portion of said charge storing layer and only a portion of said isolation region.