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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
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.

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Articles
Copyright
Copyright © Materials Research Society 1999

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References

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