Patent ID: 6861701
Filing Date: 2005-03-01
Classification: H01L

Abstract:
1. A power MOSFET comprising: a substrate having a first trench and a second trench extending from a top surface of the substrate; a source region, a channel region, and a drain region in the substrate and arranged vertically along at least a portion of a wall of the first trench; a gate structure that extends continuously in the first and second trenches, wherein a top surface of the gate structure does not extend above the top surface of the substrate, a first portion of the gate structure acts as a gate of a vertical device in the wall of the first trench, and a second portion of the gate structure resides in the second trench; and a metal layer that is patterned to form a source contact that overlies the first trench and contacts the source region adjacent to the first trench and a gate contact that contacts the second portion of the gate structure in the second trench.