Patent ID: 6437416
Filing Date: 2002-08-20
Classification: H01L

Abstract:
A semiconductor device having increased breakdown voltage comprising:a semiconductor body having a surface region of one conductive-type abutting a surface of said semiconductor body, a device region formed in said surface region of opposite conductive-type, said device region abutting said surface, a field oxide on said surface and surrounding said device region, said field oxide including a recessed portion of reduced thickness in the range of about 0.6-1.4 &mgr;m adjacent to said device region, a device within said device region having a p-n junction which terminates under said recessed portion of said field oxide, and a conductive plate on said recessed portion capacitively coupled to said semiconductor body for enhancing breakdown voltage of said p-n junction during device operation. said conductive plate having a width at least equal to a depletion region width in said semiconductor body under said conductive plate at breakdown voltage of a device in said device region.