Patent ID: 7956412

Claim:
A semiconductor structure comprising: a trench located in a semiconductor substrate and containing at least one trench sidewall and a trench bottom surface; a body having a doping of a first conductivity type and located in said semiconductor substrate and not contacting said trench; a drift region having a doping of a second conductivity type throughout and physically contacting said at least one sidewall and said trench bottom surface, wherein said second conductivity type is the opposite of said first conductivity type; a drift region dielectric of unitary construction comprising a dielectric material, located directly on and inside of said trench, and containing a bottom dielectric portion vertically abutting said trench bottom surface and a sidewall dielectric portion laterally abutting said at least on trench sidewall; a gate electrode abutting a gate dielectric, wherein said drift region, said body, and said drift region dielectric contact an entirety of a bottom surface of said gate dielectric; a gate electrode abutting a gate dielectric; and a field plate located within said trench, vertically abutting said bottom dielectric portion, and disjoined from said gate electrode.