Stacked-nitride oxide gate MISFET with high hot-carrier-immunity

Hiroshi Iwai*, Hisayo Sasaki Momose, Toyota Morimoto, Yoshio Ozawa, Kikuo Yamabe

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

14 Scopus citations


The hot-carrier-induced reliability of LPCVD (low-pressure chemical vapor deposition) stacked nitride oxide MISFETs was studied by changing the nitride and oxide film thickness. When the nitride film was thick, the shift in threshold voltage was significant. When the nitride thickness was decreased to 3-4 nm, this threshold voltage shift was less of a problem, but interface state generation caused trouble. Densification of the stacked film by high temperature RTP was investigated for any further film quality improvements for the hot-carrier reliability. Simple RTA did not improve the reliability at all. On the other hand, RTN on the stacked-nitride film improved it drastically. In addition, after RTN, the stacked-nitride film withstood re-oxidation, while samples tested after RTA did not.

Original languageEnglish
Pages (from-to)235-238
Number of pages4
JournalTechnical Digest - International Electron Devices Meeting
StatePublished - Dec 1990
Event1990 International Electron Devices Meeting - San Francisco, CA, USA
Duration: 9 Dec 199012 Dec 1990


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