Patent ID: 8963162
Filing Date: 2015-02-24
Classification: H01L

Abstract:
1. A high electron mobility transistor (HEMT) 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 a carrier channel is located between the first III-V compound layer and the second III-V compound layer; a source feature and a drain feature disposed on the second III-V compound layer, 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 intermetallic compound is free of Au and comprises Al, Ti or Cu, wherein each intermetallic compound has a non-flat top surface; one or more isolation regions embedded in the first III-V compound layer and the second III-V compound layer; a p-type layer overlying each of a portion of a dielectric cap layer, a portion of a protection layer, and a portion of the second III-V compound layer between the source feature and the drain feature; a gate electrode disposed on the p-type layer; and a depletion region disposed in the carrier channel and under the gate electrode.