Patent ID: 7482654
Filing Date: 2009-01-27
Classification: H01L

Abstract:
1. A power semiconductor device comprising: a semiconductor body having a common conduction region of one conductivity, and a base region of another conductivity, said semiconductor body including a first surface; a trench extending from said first surface through said base region and into said common conduction region, said trench including at least two opposing sidewalls and a bottom; a first gate insulation adjacent one of said sidewalls; a first gate electrode adjacent said first gate insulation and spanning said base region; a second gate insulation adjacent the other of said sidewalls; a second gate electrode adjacent said second gate insulation and spanning said base region; a source field electrode having a first portion and a second portion, said first portion of said source field electrode being disposed between said first and said second gate electrodes and insulated from the same by an insulation body, and said second portion of said source field electrode being disposed below said first portion and said gate electrodes; a source region adjacent each sidewall of said trench; and a source contact electrically connected to said source field electrode and said source regions, wherein said source field electrode extends out of said trench and above said first surface of said semiconductor body.