Patent ID: 8507920
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a first III-V compound layer; a second III-V compound layer disposed on the first III-V compound layer and different from the first III-V compound layer in composition, wherein an interface is defined between the first III-V compound layer and the second III-V compound layer; a gate disposed on an upper surface of the second III-V compound layer; a source feature and a drain feature disposed on opposite side of the gate, each of the source feature and the drain feature comprising a corresponding intermetallic compound at least partially embedded in the second III-V compound layer, wherein each of the intermetallic compounds is free of Au and comprises Al, Ti or Cu, and contacts a carrier channel located at the interface; and a dielectric cap layer over the upper surface of the second III-V compound layer, at least a portion of the dielectric cap layer being sandwiched between a portion of the intermetallic compounds and the second III-V compound layer.