Characterization of the silicon nitride-thermal oxide interface in ONO structures by ELS, XPS, ellipsometry, and numerical simulation

V. A. Gritsenko, Yu N. Morokov, Yu N. Novikov, I. P. Petrenko, S. N. Svitasheva, H. Wong, R. Kwok, R. Chan

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

Abstract

Using electron energy loss spectroscopy (ELS), XPS, and ellipsometry measurements, large amount of Si-Si bonds at Si3N4/thermal SiO2 interface are identified. Abnormally large value of refractive index (n = 2.1) in the Si3N4/SiO2 interface layer was obtained. The effective width of Si-rich interfacial layer is estimated to be about 5-10 angstroms. The excess silicon at Si3N4/SiO2 interface was created by replacing nitrogen with oxygen during the oxidation of Si3N4. The abnormally large electron capturing at Si3N4/SiO2 interface observed previously and the accumulation of positive charge at top interface of nitrided oxide under ionizing irradiation are explained with the existence of Si-Si bonds at Si3N4/SiO2 interface.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Microelectronics
PublisherIEEE
Pages111-114
Volume1
Publication statusPublished - 1997
Externally publishedYes
EventProceedings of the 1997 21st International Conference on Microelectronics, MIEL'97. Part 1 (of 2) - Nis, Yugosl
Duration: 14 Sept 199717 Sept 1997

Publication series

Name
Volume1

Conference

ConferenceProceedings of the 1997 21st International Conference on Microelectronics, MIEL'97. Part 1 (of 2)
CityNis, Yugosl
Period14/09/9717/09/97

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