The rf performance of 1 × 200 μm2 AlGaN/GaN MOS-HEMTs with Sc2O3 used as both the gate dielectric and as a surface passivation layer is reported. A maximum fT of ∼ 11 GHz and fMAX of 19 GHz were obtained. The equivalent device parameters were extracted by fitting this data to obtain the transconductance, drain resistance, drain-source resistance, transfer time and gate-drain and gate-source capacitance as a function of gate voltage. The transfer time is in the order 0.5-1 ps and decreases with increasing gate voltage.
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics