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Paramagnetic Defects Related to Positive Charges in Silicon Oxynitride Films

Published online by Cambridge University Press:  10 February 2011

Y. Miura ,
S. Fujieda  and
E. Hasegawa
Y. Miura
Affiliation:
Silicon Systems Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan, miura@lbr.cl.nec.co.jp
S. Fujieda
Affiliation:
Silicon Systems Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan, miura@lbr.cl.nec.co.jp
E. Hasegawa
Affiliation:
ULSI Device Development Laboratory, NEC Corporation, 1120 Shimokuzawa, Sagamihara, Kanagawa 229-1198, Japan
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Abstract

Electron spin resonance (ESR) spectroscopy is used to explore the origin of positive charges in silicon oxynitride thin films formed in a N2O ambient. A new type of paramagnetic center in as-grown oxynitrides appeared as a single peak in the ESR spectrum with a zero crossing g value of 2.0006. This value suggests that the paramragnetic center is a kind of E' center. We investigated the quantitative behavior of the positive charge center and the paramagnetic center through the density changes induced by vacuum ultraviolet irradiation and hydrogen annealing. Based on the similar behavior of both types of center, we argue that the paramagnetic centers can account for a significant part of the positive charges specific to oxynitrides. Since the spin density increased with the oxynitridation temperature, the paramagnetic center is closely related to nitrogen incorporation processes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 592 , 1999 , 263
Copyright
Copyright © Materials Research Society 2000

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References

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