Modeling of Subsurface Leakage Current in Low src='/images/tex/34079.gif' alt='V_{mathrm {TH}}'> Short Channel MOSFET at Accumulation Bias

摘要

We present a phenomenological model for subsurface leakage current in MOSFETs biased in accumulation. The subsurface leakage current is mainly caused by source–drain coupling, leading to carriers surmounting the barrier between the source and the drain. The developed model successfully takes drain-to-source voltage (, gate-to-source voltage (, gate length (, substrate doping concentration (, and temperature () dependence into account. The presented analytical model is implemented into the BSIM6 bulk MOSFET model and is in good agreement with technology-CAD simulation data.