Patent ID: 7829941
Filing Date: 2010-11-09
Classification: H01L

Abstract:
1. A trenched metal oxide semiconductor field effect transistor (MOSFET) device comprising a trenched gate surrounded by a source region encompassed in a body region above a drain region disposed on a bottom surface of a substrate, wherein said MOSFET cell further comprising: a source contact opening and a gate contact opening opened through a protective insulation layer and filled with a source and body contact metals therein to contact said source and said gate of said MOSFET cell respectively; a salicided layer disposed on a bottom surface of said source contact opening wherein said salicide layer terminating at bottom corners of said source contact opening having an area and size substantially the same as the bottom surface of said source contact opening and vertically above said body region wherein said salicided layer further contacting a bottom surface of said source contact metal filled in said source contact opening; and said source contact opening filled with said source contact metal is surrounded by sidewalls of said protective insulation layer covering over said source region formed as a buried region in said substrate vertically below said bottom surface of said source contact opening.