Patent ID: 6765242
Filing Date: 2004-07-20
Classification: H01L

Abstract:
An NPN double-heterojunction bipolar transistor formed on a gallium arsenide (GaAs) substrate and comprising:(a) a base region further comprising a layer of p-type-doped indium gallium arsenide nitride (InGaAsN); (b) an emitter region located on one side of the base region and further comprising a layer of a first n-type-doped semiconductor having a bandgap energy greater than the bandgap energy of the InGaAsN base region; (c) a collector region located on the other side of the base region and further comprising a layer of a second n-type-doped semiconductor having a bandgap energy greater than or equal to the bandgap energy of the InGaAsN base region; and (d) electrodes forming separate electrical connections to each of the collector, emitter and base regions of the transistor.