GALLIUM NITRIDE HIGH ELECTRON MOBILITY TRANSISTOR STRUCTURE

摘要

A semiconductor structure, comprising: a substrate; a first aluminum nitride (AlN) layer having an aluminum/reactive nitride (Al/N) flux ratio less than 1 disposed on the substrate; and a second AlN layer having an Al/reactive N flux ratio greater than 1 disposed on the first AlN layer. The substrate is a compound of silicon wherein the first AlN layer is substantially free of silicon.