Effects of nitrogen-incorporated interface layer on the transient characteristics of hafnium oxide n-metal–oxide–semiconductor field-effect transistors

In this letter, we present the effects of the nitrogen-incorporated interface on threshold voltage shift (ΔVth), which was induced by charge trapping and detrapping in hafnium oxide (HfO2) n-metal–oxide–semiconductor field-effect transistors. Under the various gate voltage conditions, the nitrogen-i...

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Bibliographic Details
Published in:Applied physics letters 2005-03, Vol.86 (12)
Main Authors: Kang, Chang Yong, Rhee, Se Jong, Choi, Chang Hwan, Kang, Chang Seok, Choi, Rino, Akbar, Mohammad S., Zhang, Manhong, Krishnan, Siddarth A., Lee, Jack C.
Format: Article
Language:English
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Summary:In this letter, we present the effects of the nitrogen-incorporated interface on threshold voltage shift (ΔVth), which was induced by charge trapping and detrapping in hafnium oxide (HfO2) n-metal–oxide–semiconductor field-effect transistors. Under the various gate voltage conditions, the nitrogen-incorporated interface showed a smaller ratio of interface charge density to total charge density (Nit∕Ntotal) due to its thinner interface thickness and lower energy band offset. In addition, the degradations of the interface quality and the mobility under the stress condition were less severe for the nitrogen-incorporated interface devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1890479