Nearly ideal InP/GaAsSb/InP double heterojunction bipolar transistors with ballistically launched collector electrons

Near-ideal abrupt heterojunction InP-GaAsSb-InP double heterojunction bipolar transistors (DHBTs) have been implemented. The GaAsSb conduction band edge is measured to be 0.18 eV higher than the InP conduction band edge. Resulting in a ballistic electron launcher collector that is free of the blocking effect normally associated with GaInAs DHBTs. The collector and base current ideality factors were 1.00 and 1.05, respectively. Also a very low collector offset voltage V/sub CE,OFF/=14 mV was measured for 5/spl times/12 /spl mu/m/sup 2/ self-aligned DHBTs.