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Lateral Epitaxial Overgrowth of InAs on (100) GaAs Substrates

Published online by Cambridge University Press:  11 February 2011

Ganesan Suryanarayanan
Affiliation:
Materials Science Program
Anish A. Khandekar
Affiliation:
Department of Chemical Engineering
Brian E. Hawkins
Affiliation:
Department of Chemical Engineering
Thomas F. Kuech
Affiliation:
Materials Science Program Department of Chemical Engineering
Susan E. Babcock
Affiliation:
Materials Science Program Department of Materials Science and Engineering, University of Wisconsin - Madison, Madison, WI 53706.
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Abstract

The microstructure of epitaxial InAs thin films grown by MOCVD on mask-patterned “LEO” (lateral epitaxial overgrowth) GaAs and on unpatterned GaAs substrates was studied using double-crystal x-ray diffraction, scanning electron microscopy and cross-sectional transmission electron microscopy. This paper describes the improvement in crystal quality (factor of 20 reduction in x-ray rocking curve width), the order of magnitude reduction in dislocation density, and the rearrangement of the remaining extended defects that were observed in the LEO material when compared to the film grown on the unpatterned wafer.

Type
Research Article
Copyright
Copyright © Materials Research Society 2003

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References

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