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A transmission electron microscopy investigation of SiC films grown on SiC substrates by solid-source molecular beam epitaxy

Published online by Cambridge University Press:  31 January 2011

U. Kaiser ,
I. Khodos ,
P. D. Brown ,
A. Chuvilin ,
M. Albrecht ,
C. J. Humphreys ,
A. Fissel  and
W. Richter
U. Kaiser
Affiliation:
Institut f¨r Festkdörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany
I. Khodos
Affiliation:
Institute of Microelectronics Technology and High Purity Materials RAS, 142432 Chernogolovka, Germany
P. D. Brown
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, united kingdom
A. Chuvilin
Affiliation:
Institute of Catalysis, Novosibirsk 90, 630090Germany
M. Albrecht
Affiliation:
Institut für Werkstoffwissenschaften, Universität Erlangen, Cauerstrasse 6, D-91058 Erlangen, Germany
C. J. Humphreys
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, united kingdom
A. Fissel
Affiliation:
Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany
W. Richter
Affiliation:
Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany
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Abstract

The relationship between the defect microstructure of SiC films grown by solid-source molecular-beam epitaxy on 4H and 6H–SiC substrates and their growth conditions, for substrate temperatures ranging between 950 and 1300 °C, has been investigated by a combination of transmission electron microscopy and atomic force microscopy. The results demonstrate that the formation of defective cubic films is generally found to occur at temperatures below 1000 °C. At temperatures above 1000 °C our investigations prove that simultaneous supply of C and Si in the step-flow growth mode on vicinal 4H and 6H substrate surfaces results in defect-free hexagonal SiC layers, and defect-free cubic SiC can be grown by the alternating deposition technique. The controlled overgrowth of hexagonal on top of cubic layers is demonstrated for thin layer thicknesses.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 8 , August 1999 , pp. 3226 - 3236
Copyright
Copyright © Materials Research Society 1999

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References

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