Title: Statistical Characterization and Modeling of the Temporal Evolutions of Delta V-t Distribution in NBTI Recovery in Nanometer MOSFETs
Authors: Chiu, Jung-Piao
Liu, Yu-Heng
Hsieh, Hung-Da
Li, Chi-Wei
Chen, Min-Cheng
Wang, Tahui
Department of Electronics Engineering and Institute of Electronics
Keywords: Activation energy;charge emission time;negative bias temperature instability;recovery;statistical model
Issue Date: 1-Mar-2013
Abstract: NBTI trapped charge characteristics and recovery mechanisms are examined by a statistical study of individual trapped charge emissions in nanoscale HfSiON/metal gate pMOSFETs. We measure individual trapped charge emission times in NBTI recovery in a large number of devices. The characteristic time distributions of the first three emitted holes are obtained. The distributions can be well modeled by using a thermally-assisted tunnel (ThAT) detrapping model. NBTI trapped charge energy and spatial distributions and its activation energy distribution in the ThAT model are discussed and extracted. Based on the ThAT model and measured result of single-charge induced V-t shifts, we develop a statistical NBTI recovery Delta V-t evolution model. Our model can well reproduce the temporal evolutions of a Delta V-t distribution in a number of NBTI stressed nanometer MOSFETs in relaxation.
URI: http://dx.doi.org/10.1109/TED.2013.2240390
ISSN: 0018-9383
DOI: 10.1109/TED.2013.2240390
Volume: 60
Issue: 3
Begin Page: 978
End Page: 984
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