Patent ID: 8299547

Claim:
A field effect transistor comprising: a semiconductor body having a rectangular prism shape with a bottom surface, a top surface, and opposing sides and opposing ends extending vertically from said top surface to said bottom surface, said opposing sides comprising a first side and a second side opposite said first side, said opposing ends comprising a first end and a second end opposite said first end, and said semiconductor body comprising the following between said first side and said second side: a source region at said first end; a channel region positioned laterally adjacent to said source; a drain drift region positioned laterally adjacent to said channel region; and a drain region at said second end and positioned laterally adjacent to said drain drift region; an isolation region positioned laterally adjacent to said opposing sides and said opposing ends of said semiconductor body; and a gate structure traversing said top surface of said semiconductor body from said first side to said second side above said channel region, said gate structure further comprising extensions adjacent to said drain drift region on said first side and said second side, each extension extending vertically through said isolation region and extending laterally from said channel region toward said drain region, and each extension further having a sidewall that is angled relative to said semiconductor body such that a portion of said isolation region between said extension and said semiconductor body has a continuously increasing width along a length of said drain drift region from said channel region to said drain region.