Abstract
This paper describes specific features in low-temperature drain current and transconductance characteristics of thin silicon-on-insulator n-channel metal-oxide-semiconductor field effect transistors (SOI nMOSFET's) with a sub-10-nm-thick silicon layer and presents some simple analyses based on quantum mechanics. It is suggested that these features originate from the two-dimensional subband system in the thin SOI layer and its local deviation based on the local-deviated silicon layer thickness reflecting the buried oxide layer surface morphology of high-temperature-annealed SIMOX substrates.