Patent ID: 7489016
Filing Date: 2009-02-10
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a semiconductor substrate of a first conductivity type; an epitaxial layer of said first conductivity type formed over said substrate; a trench formed in said epitaxial layer, said trench having a bottom in said epitaxial layer above an interface between said epitaxial layer and said substrate, said trench containing a dielectric material; a region of a second conductivity type abutting a side of said trench; a second trench formed in said epitaxial layer, said second trench having a bottom in said epitaxial layer above said interface between said epitaxial layer and said substrate, said second trench containing a dielectric material, said region abutting a side of said second trench; and a buried layer of said second conductivity type, said buried layer extending upward from said substrate and merging with said region.