Patent ID: 8796761
Filing Date: 2014-08-05
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a trench region extending into a drift zone of a semiconductor body from a surface; a dielectric structure extending along a lateral side of the trench region, wherein a part of the dielectric structure is a charged insulating structure; a gate electrode in the trench region; a body region of a conductivity type other than the conductivity type of the drift zone; wherein the charged insulating structure adjoins each one of the drift zone, the body region and the dielectric structure and further adjoins or is arranged below a bottom side of a gate dielectric of the dielectric structure; and wherein the charged insulating structure is arranged between a gate insulator and a field insulator along a vertical direction perpendicular to the surface, and wherein a thickness of the gate insulator along a lateral direction parallel to the surface is smaller than a thickness of the field insulator along the lateral direction.