Patent ID: 7268395

Claim:
A deep trench super switch device comprising: a drain electrode; a body formed on the drain electrode of a first conductivity type; an epitaxial layer of a first conductivity type formed on the body of the first conductivity type; a plurality of trenches etched into the epitaxial layer, each of the plurality of trenches containing a stack of conductive floating polysilicon layers, a gate electrode on top of the stack of conductive floating polysilicon layers, and a nonconductive material surrounding each of the gate electrode and the conductive polysilicon layers; a plurality of channel regions of a second conductivity type, each of the channel regions being formed on the epitaxial layer and between two opposing trenches and opposite a respective gate electrode in each of said opposing trenches; a plurality of source regions of the first conductivity type, each of the source regions being formed in one of the channel regions; and a plurality of source contacts, each of the source contacts contacting one of the source regions and one of the channel regions.