Hot Electron Degradation of the DC and Microwave Performance of InAlAs/InGaAs/InP HEMTs

This work for the first time describes the results of hot electron stress experiments performed on InAlAs/InGaAs/InP HEMTs. Both DC and RF device degradation have been studied. The main effect observed is a reduction of the DC transconductance at high gate bias; at RF this results in a decrease of current and power gain, hence of the device cutoff frequencies.