The mechanism of epitaxial Si‐Ge/Si heterostructure formation by wet oxidation of amorphous Si‐Ge thin films
作者:
S. M. Prokes,
A. K. Rai,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 67,
issue 2
页码: 807-813
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.345736
出版商: AIP
数据来源: AIP
摘要:
Epitaxial Si‐Ge/Si heterostructures have been formed from amorphous Si0.86Ge0.14, Si0.7Ge0.3, and Si0.56Ge0.44films which were deposited at a vacuum of 10−7Torr, followed by a wet oxidation process. The presence of an initial native oxide precluded solid phase epitaxy under standard annealing conditions, but epitaxy could be achieved by the use of wet oxidation. The samples were oxidized for various times at 900 °C and examined in reflected electron diffraction, ellipsometry, and cross‐sectional and plan‐view transmission electron diffraction. The formation of the epitaxial layer has been examined, and an epitaxial growth model is suggested.
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