I. Hirano, Y. Nakasaki, S. Fukatsu, Akiko Masada, Y. Mitani, M. Goto, K. Nagatomo, S. Inumiya, K. Sekine
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Impact of metal gate electrode on Weibull distribution of TDDB in HfSiON gate dielectrics
The slope parameter of Weibull plot of Tbd, β, strongly depends on gate electrode material for metalgate/HfSiON gate stacks in n-FETs. Furthermore β of Tbd under bipolar stress is larger than that under DC stress. From these results, it is found that the balance of injected carriers is strongly related to β in terms of the origin of large β for metal-gate/high-k.
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