Impact of fin width on nano scale tri-gate FinFET including the quantum mechanical effect

Abstract

An inversion charge-based threshold voltage model is proposed for 10 nm channel length Tri-gate (TG) FinFET. The variation threshold voltage has been studied with respect to fin width for different fin height and channel length The effect of width quantization has been explained with the help of the quantum mechanical effect (QME). A precise comparison of threshold voltage in terms of classical mechanics and quantum mechanics depicts the presence of width quantization in short channel device. The improvement of the short channel effects (SCEs), like subthreshold swing (SS), drain-induced barrier lowering (DIBL) and threshold voltage roll off have been studied. The impact of channel length to fin width ratio on DIBL and has been examined. The improvement of the SCEs at the same oxide thickness has been observed for high-k dielectric material. The potential and effect of hafnium oxide (HfO2) have been discussed and validated using technology computer-aided design (TCAD) simulation.