Patent ID: 8390060
Filing Date: 2013-03-05
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first-conductivity-type semiconductor source region; a second-conductivity-type semiconductor body region; a gate electrode, which is capacitively coupled to invert a portion of said body region, to thereby create a channel; a semiconductor drift region which includes both first-conductivity-type and second-conductivity-type semiconductor portions in parallel; immobile electrostatic charge which is capacitively coupled to invert parts of said second-conductivity-type drift region portions; and a first-conductivity-type semiconductor drain region; wherein said body region is interposed between said source region and said drift region; and wherein said drift region is interposed between said body region and said drain region; and further comprising an intermediate layer which has a first conductivity type, and has a higher doping than said first-conductivity-type semiconductor portion, and which electrically connects said channel both laterally and vertically to both said first-conductivity-type and said second-conductivity-type semiconductor portions, and which is physically interposed between said channel and both said first-conductivity-type and said second-conductivity-type semiconductor portions; whereby, in the ON state, majority carriers flow both through said first-conductivity-type portions, and at least some parts of said second-conductivity-type portions of said drift region, in parallel.