Patent ID: 8421148
Filing Date: 2013-04-16
Classification: H01L

Abstract:
1. A semiconductor device comprising: a drift layer of a first conductivity type; a channel layer of a second conductivity type on the drift layer, the second conductivity type opposite the first conductivity type; a source layer of the first conductivity type on the channel layer; a source contact extending on the source layer; a trench extending through the source layer and the channel layer, and into the drift layer, so that a bottom of the trench is within the drift layer; a gate electrode within the trench; a buried region of the second conductivity type within the drift layer, the buried region extending laterally to include a portion directly underneath an entirety of the trench and beyond a corner of the trench, so that a shallow region of the drift layer is between the bottom of the trench and the buried region; and a conductive via electrically connecting the source contact to the buried region.