A power semiconductor device includes a substrate having an upper surface
and a lower surface. The substrate has a trench. First and second doped
regions are provided proximate the upper surface of the substrate. A
first source region is provided within the first doped region. A second
source region is provided within the second doped region. A gate is
provided between the first and second source regions. The gate includes a
first portion extending downward into the trench. A depth of the trench
is no more than a depth of the first doped region.