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A Model of the Gas-Phase Chemistry of Boron Nitride CVD From BCl3 and NH 3*

Published online by Cambridge University Press:  10 February 2011

Mark D. Allendorf ,
Carl F. Melius  and
Thomas H. Osterheld
Mark D. Allendorf
Affiliation:
Sandia National Laboratories Livermore, CA 94551-0969
Carl F. Melius
Affiliation:
Sandia National Laboratories Livermore, CA 94551-0969
Thomas H. Osterheld
Affiliation:
Sandia National Laboratories Livermore, CA 94551-0969
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Abstract

The kinetics of gas-phase reactions occurring during the CVD of boron nitride (BN) from BCl3 and NH3 are investigated using an elementary reaction mechanism whose rate constants were obtained from theoretical predictions and literature sources. Plug-flow calculations using this mechanism predict that unimolecular decomposition of BCl3 is not significant under typical CVD conditions, but that some NH3 decomposition may occur, especially for deposition occurring at atmospheric pressure. Reaction of BCl3 with NH3 is rapid under CVD conditions and yields species containing both boron and nitrogen. One of these compounds, Cl2BNH2, is predicted to be a key gas-phase precursor to BN.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 410: Symposium S – Covalent Ceramics III-Science and Technology of Non-Oxides , 1995 , 459
Copyright
Copyright © Materials Research Society 1996

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References

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