In Situ Surface Passivation and CMOS-Compatible Palladium–Germanium Contacts for Surface-Channel Gallium Arsenide MOSFETs

In this letter, we report a novel n-channel GaAs MOSFET featuring TaN/HfAlO/GaAs gate stack with in situ surface passivation (vacuum anneal and silane treatment), alternative gold-free palladium-germanium (PdGe) source and drain (S/D) ohmic contacts, and silicon plus phosphorus coimplanted S/D regions. With the novel in situ surface passivation, excellent… CONTINUE READING