Patent ID: 7274083

Claim:
A semiconductor device comprising: a discrete raised region of n-type SiC semiconductor material on an n-type SiC semiconductor substrate layer, wherein the discrete raised region of n-type SiC semiconductor material has an upper surface and sidewalls and wherein the SiC semiconductor substrate layer extends beyond the sidewalls; one or more discrete raised regions of p-type SiC semiconductor material on a central portion of the upper surface of the n-type SiC semiconductor material; a continuous raised region of p-type SiC semiconductor material on a peripheral portion of the upper surface of the n-type SiC semiconductor material and circumscribing the one or more discrete raised regions of p-type SiC semiconductor material, the continuous raised region of p-type SiC semiconductor material having a peripheral edge; ohmic contacts on the one or more discrete raised regions of p-type SiC and on the continuous raised region of p-type SiC semiconductor material; one or more layers of dielectric material on the SiC semiconductor substrate layer extending beyond the periphery of the discrete region of n-type SiC semiconductor material and on the sidewalls of the n-type region and on the peripheral edge of the continuous raised region of p-type SiC semiconductor material; and a first metal layer on and in contact with: the ohmic contacts on the one or more discrete raised regions of p-type SiC; the ohmic contact on the continuous raised region of p-type SiC semiconductor material; and the region of n-type SiC semiconductor material.