Patent ID: 6262457
Filing Date: 2001-07-17
Classification: H01L

Abstract:
A transistor structure, comprising:a semiconductor substrate of a second conductivity type;an epitaxial layer of a first conductivity type formed on said substrate and defining an interface boundary with said substrate;a buried zone of the first conductivity type disposed at the interface boundary between said semiconductor substrate and said epitaxial layer in said semiconductor substrate and in said epitaxial layer;a semiconductor region of the second conductivity type disposed in said epitaxial layer in contact with said buried zone, said semiconductor region having a surface;zones of the first conductivity type formed at said surface of said semiconductor region;at least a first insulator layer disposed on said surface of said semiconductor region between said zones; andat least one conducting layer formed on said first insulator layer;a diffusion region extending from said first insulation layer to said buried zone;a further doped region of the second conductivity type extending from said first insulation layer through said epitaxial layer to said semiconductor substrate, said further doped region capable of acting as an isolation region.