Patent ID: 8525288

Claim:
A semiconductor arrangement comprising: a doped substrate layer of a first conductive type; a doped epitaxial layer of the first conductive type deposited on the doped substrate layer, wherein the substrate layer is more highly doped than the epitaxial layer; a Schottky barrier, at least a portion of the Schottky barrier deposited on the epitaxial layer; a diffusion region of a second conductivity type embedded in the epitaxial layer, the diffusion region configured to diffuse through the epitaxial layer so as to be in contact with the substrate layer and form a direct junction with the substrate layer, the diffusion region configured to surround the Schottky barrier in an annular manner so that an outer profile of the Schottky barrier is positioned over the diffusion region; and a doped top region of the second conductivity type disposed on the diffusion region, wherein a portion of the doped top region is disposed between the Schottky barrier and the diffusion region, an outer profile of the doped top region is configured to be away from the epitaxial layer, and the doped top region is more highly doped than the diffusion region.