Reduction in misfit dislocation density by the selective growth of Si1−xGex/Si in small areas
作者:
D. B. Noble,
J. L. Hoyt,
C. A. King,
J. F. Gibbons,
T. I. Kamins,
M. P. Scott,
期刊:
Applied Physics Letters
(AIP Available online 1990)
卷期:
Volume 56,
issue 1
页码: 51-53
ISSN:0003-6951
年代: 1990
DOI:10.1063/1.103176
出版商: AIP
数据来源: AIP
摘要:
Si1−xGexand Si layers have been grown selectively in the exposed Si regions on oxide‐patterned 〈100〉 oriented Si wafers using the chemical vapor deposition technique limited reaction processing. Misfit dislocation spacings at the heterointerface were measured using plan‐view transmission electron microscopy in conjunction with a large‐area thinning technique which allows for examination of 100–150 &mgr;m diameter areas. The dislocation density is reduced by at least a factor of 20 for small areas (lateral dimensions: tens of microns) bounded by oxide isolation when compared to adjacent large areas (millimeters) which are uninterrupted by the patterned oxide. The ability to selectively grow Si1−xGexon patterned wafers and the area‐dependent reduction in dislocation density in as‐grown films may be important considerations for future device applications using Si1−xGexstrained layers.
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