The device characteristics of Ir- and Ti-based Schottky gates AlSb/InAs high electron mobility transistors
The InAs/AlSb HEMT using refractory iridium (Ir) gate technology was proposed. The Ir-gate exhibited a superior metal work function for increasing ?B of InAs/AlSb heterostructures to 0.58eV. The Ir-gate HEMT show higher threshold voltage and lower gate current. The Ir-gated HEMT also shows stability improvement of DC characteristics under hot carrier stress.
alsb/inas iridium hot carrier stress reliability