Workfunction fluctuations in polycrystalline TiN observed with KPFM and their impact on MOSFETs variability

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Title:	Workfunction fluctuations in polycrystalline TiN observed with KPFM and their impact on MOSFETs variability
Author:	Ruiz, Ana; Seoane, Natalia; Claramunt, Sergi; Garcia-Loureiro, Antonio; Porti i Pujal, Marc; Couso, Carlos; Martin Martinez, Javier; Nafría i Maqueda, Montserrat
Abstract:	A more realistic approach to evaluate the impact of polycrystalline metal gates on the MOSFET variability is presented. 2D experimental workfunction maps of a polycrystalline TiN layer were obtained by Kelvin Probe Force Microscopy with a nanometer resolution. These data were the input of a device simulator, which allowed us to evaluate the effect of the workfunction fluctuations on MOSFET performance variability. We have demonstrated that in the modelling of TiN workfunction variability not only the different workfunctions of the grains but also the grain boundaries should be included.
Subject(s):	-KPFM -Polycrystalline metal gate -Variability -MOSFET
Rights:	open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/
Document type:	Article
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Uri:	https://ddd.uab.cat/record/249164