Patent ID: 8076724

Claim:
A semiconductor device comprising: a substrate comprising: at least one active region wherein the active region has a first surface and at least one transistor cell; and at least one dielectric platform region, the dielectric platform region comprising a support structure in a pin wheel shape wherein the support structure comprises dielectric material, wherein the support structure is formed at a first depth in the substrate below the first surface of the at least one active region to a second depth in the substrate below the first surface of the at least one active region; a dielectric layer overlying the dielectric platform region wherein the dielectric layer caps and seals the dielectric platform region; a tub region at least partially disposed in the active region at a tub region depth; and a trench formed in at least a portion of the active region, wherein the trench is formed to a depth equal to or greater than the tub region depth to achieve planar or near planar breakdown in the active region; wherein the at least one transistor cell is a mesh transistor cell having a centralized source region, a circular shaped gate, and a drain being the substrate.