Patent ID: 7915677

Claim:
A semiconductor device comprising: a substrate having a first layer and a second layer; an extended drift region in the first layer, the extended drift region having a first conductivity type; a first region in the second layer, the first region being positioned above the extended drift region and having the first conductivity type; a drain region in the first region, the drain region having the first conductivity type; a second region located in an upper portion of the second layer substantially adjacent to the first region in a plane substantially parallel to a major surface of the substrate, the second region having a second conductivity type; a source region located in the second region, the source region having the first conductivity type; a first field dielectric over portions of the first region; a gate dielectric overlying and extending from a portion of the first field dielectric to a portion of the second region; and a gate electrode overlying the gate dielectric.