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Heteroep1Taxial Nucleation and Structural Properties of MBE GaAs on Recessed Si: Etching Implications.

Published online by Cambridge University Press:  28 February 2011

Jo De Boeck
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Jiben Liang
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Jan Vanhellemont
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Kristin Deneffe
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Chris Van Hoof
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Douglas J. Arent
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Gustaaf Borghs
Affiliation:
Interuniversity Micro Electronics Center (IMEC vzw.), 75 Kapeldreef, B-3030 Leuven; Belgium
Jürgen Christen
Affiliation:
Technische Universitlit Berlin, 36 HardenbergstraBe, D-1000 Berlin 12; Federal Republic of, Germany
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Abstract

GaAs is grown embedded in pre-etched wells in the Si substrate. HNO3:HF, KOH:H2O and a dry etch technique are used as alternatives to form the wells. Cross-sectional SEM views of AlGaAs/GaAs heterostructures reveal the growth front and facet formation for the different sidewall geometries. Transmission electron microscopy is used to study epilayer degradation in relation to the substrate damage and the presence of edge induced defects in the GaAs. Cathodoluminescence reveals the uniformity of strain present in the GaAs layer embedded in the wet etched well. The impact of the different etching techniques on device integration is briefly discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 1989

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