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Mechanism of Chromium Deposition from Cr(CO)6 by Uv Laser Light

Published online by Cambridge University Press:  21 February 2011

R. Nowak  and
P. Hess
R. Nowak
Affiliation:
Institute of Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, D-6900 Heidelberg, F. R. G
P. Hess
Affiliation:
Institute of Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, D-6900 Heidelberg, F. R. G
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Abstract

The mechanism of metal film deposition from carbonyls as precursors is discussed in detail. It is shown that different species produced by UV laser irradiation in the gas phase contribute to film growth. Highly reactive species such as metal atoms may be important during the nucleation phase, whereas more stable carbonyls are responsible for the main growth process. This indicates that the main decarbonylation effect occurs at the surface. The higher level of impurity incorporation in chromium films in comparison with nickel films is explained by the relative position of the Fermi level in the d-band of Ni and Cr with respect to the 2π* level of CO, which favors CO bond dissociation in the case of chromium.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 158: Symposium B – In-Situ Patterning: Selective Area Deposition and Etching , 1989 , 27
Copyright
Copyright © Materials Research Society 1990

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References

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