Patent ID: 8907350

Claim:
A wide bandgap semiconductor device comprising: a wide bandgap semiconductor channel layer having a planar top surface; a wide bandgap semiconductor layer having a top surface, the wide bandgap semiconductor layer on the planar top surface of the wide bandgap semiconductor channel layer; a plurality of recesses in the top surface of the wide bandgap semiconductor layer; and a metal gate contact within the recesses and on portions of the top surface of the wide bandgap semiconductor layer that are between the recesses, a source region; a drain region; a metal gate electrode on the wide bandgap semiconductor layer between the source and drain regions, wherein the metal gate contact is connected to the metal gate electrode, wherein the source and drain regions and the metal gate electrode are configured to provide a HEMT, FET or Schottky device, wherein the metal gate electrode, the source region and the drain region extend in a first direction on the wide bandgap semiconductor layer, and the metal gate contact is wider than the metal gate electrode along an axis that is perpendicular to the first direction, and wherein a lower surface of the metal gate contact includes a plurality of protrusions along the axis that is perpendicular to the first direction, the protrusions directly contacting the underlying wide bandgap semiconductor layer.