Patent ID: 8378392

Claim:
A trench MOSFET (Metal Oxide Semiconductor Field Effect Transistor) comprising: a substrate of a first conductivity doping type; an epitaxial layer of said first conductivity doping type over said substrate; a plurality of trenched gates; a plurality of source regions of said first conductivity doping type surrounding top portion of said trenched gates; a plurality of body regions of a second conductivity doping type encompassing said source regions, wherein said body regions have concave-arc shape with respect to top surface of said epitaxial layer; a plurality of Cds enhancement doped regions of said first conductivity doping type interfaced with said body regions, wherein said Cds enhancement doped regions are formed under said body regions and have higher doping concentration than said epitaxial layer; a plurality of trenched source-body contacts; and a plurality of body ohmic contact doped regions of said second conductivity doping type surrounding at least bottoms of said trenched source-body contacts.