Patent ID: 7944018

Claim:
A semiconductor device comprising: a substrate doped with a dopant or a first conductivity type; a layer of epitaxial silicon disposed above the substrate, the layer of epitaxial silicon being doped with a dopant of the first conductivity type, the substrate being doped in an amount greater than the epitaxial silicon; a trench disposed in the layer of epitaxial silicon, the trench having sidewalls comprised of the epitaxial silicon, the trench separating an active region and a termination region of the layer, the active region comprising a superjunction Schottky diode structure, the trench being sealed by a sealing material such that the trench is air-tight; a first metal contact disposed above the active region of the layer of epitaxial silicon and proximate to the trench; and a second metal contact disposed above the termination region of the layer of epitaxial silicon and proximate to the trench, at least a portion of the sealing material being disposed over the trench and between the first metal contact and the second metal contact.