Patent ID: 7795691

Claim:
A device for controlling electrical conduction across a semiconductor body, comprising: at least one source region having a first conductivity type within the semiconductor body; at least one well region having a second conductivity type and adjacent said source region to control carrier flow from said source region; a drift region adjacent a side of said well region opposite said source region, said drift region having said first conductivity type for providing a conductive path for carriers from said source region; a channel layer on at least a portion of said source, well, and drift regions, to provide a conductive path across said well region to said drift region, wherein said channel layer comprises a first channel layer region of said first conductivity type that is adjacent said source region, a second channel layer region of said second conductivity type that is adjacent said well region, and a third channel layer region of said first conductivity type that is adjacent said drift region; a control contact on said channel layer for controlling current from said source region across said drift region.