Patent ID: 8546878
Filing Date: 2013-10-01
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer of a first conductivity type; a semiconductor layer of a second conductivity type formed on the semiconductor layer of the first conductivity type, wherein the semiconductor layer of the second conductivity type is characterized by a first thickness; a body layer of the second conductivity type extending a first predetermined distance into the semiconductor layer of the second conductivity type; a plurality of trenches extending a second predetermined distance into the semiconductor layer of the second conductivity type, wherein each of the plurality of trenches comprises a first dielectric material disposed therein, the first dielectric material including an intentionally introduced charge; a plurality of control gates coupled to the semiconductor layer of the second conductivity type; and a plurality of source regions of the first conductivity type coupled to the semiconductor layer of the second conductivity type; and wherein the intentionally introduced charge comprises a spatially fixed charge; the intentionally introduced charge comprises a net positive charge associated with cesium ions; the dielectric material comprises a silicon oxide material; wherein a pair of termination trenches extending through the body layer of the second conductivity type and the semiconductor layer of the second conductivity type.