Patent ID: 8664718
Filing Date: 2014-03-04
Classification: H01L

Abstract:
1. A power Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) comprising: a semiconductor substrate; a semiconductor region extending from a top surface of the semiconductor substrate into the semiconductor substrate, wherein the semiconductor region is of a first conductivity type; a gate dielectric over the semiconductor region; a gate electrode over the gate dielectric; a first drift region extending from the top surface of the semiconductor substrate into the semiconductor substrate, wherein the first drift region is of a second conductivity type opposite the first conductivity type; a dielectric layer comprising: a field plate over the dielectric layer, wherein the field plate is conductive, and comprises: a source region on a first side of the gate electrode; a drain region on a second side of the gate electrode opposite the first side, wherein the drain region is in contact with the first drift region; and a bottom metal layer over the field plate.