Reduction of the BTI time-dependent variability in nanoscaled MOSFETs by body bias

Abstract

We study the impact of individual charged gate oxide defects on the characteristics of nanoscaled pMOSFETs for varying body biases. Both a reduced time-zero variability and a reduced time-dependent variability are observed when a forward body bias is applied. In order to explain these observations, a model based on the modulation of the number of unscreened dopant atoms within the channel depletion region is proposed.