Patent ID: 7687851

Claim:
A trenched metal oxide semiconductor field effect transistor (MOSFET) cell 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-body contact trench extended substantially vertical relative to a top surface into said source and body regions and filled with contact metal plug; and a plurality of source dopant regions vertically implanted and aligned with said trenched gate and a plurality of body dopant regions vertically implanted and aligned with said source-body contact trench wherein at least one set of said plurality of source dopant regions aligned with said trenched gate extended over a first vertical length different from a second vertical length of said body dopant regions aligned with said source-body contact trench extended in an epitaxial layer supported on said substrate wherein said first vertical length and second vertical length depending on a trench depth of said trenched gate versus a trench depth of said source-body contact trench.