Patent ID: 8004051
Filing Date: 2011-08-23
Classification: H01L

Abstract:
1. An integrated circuit that includes a lateral trench MOSFET, the lateral trench MOSFET comprising: a source region having a first conductivity type and disposed in a semiconductor body; a drain region having the first conductivity type and disposed in the semiconductor body, the drain region spaced apart from the source region; a body region having a second conductivity type and disposed in the semiconductor body, the body region arranged between the source region and the drain region; a gate electrode disposed in a trench in the semiconductor body, the trench disposed beneath a surface of the semiconductor body and extending at least partially laterally between the source region and the drain region; a gate dielectric disposed in the trench and separating the gate electrode from the semiconductor body, the source region extending at least partially under a lower surface of the gate dielectric and a channel region being defined to extend at least partially below the gate dielectric; a field plate disposed in the trench and electrically coupled to the gate electrode, the field plate laterally disposed between the drain region and the gate electrode; and a field plate dielectric disposed in the trench and separating the field plate from the semiconductor body, the field plate dielectric being thicker than the gate dielectric.