NEW DEVELOPMENTS IN SPECTROELLIPSOMETRY - THE CHALLENGE OF SURFACES

被引:45
作者
ASPNES, DE
机构
[1] Department of Physics, North Carolina State University, Raleigh
关键词
D O I
10.1016/0040-6090(93)90050-Y
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Advances in technology, especially semiconductor technology, are providing new opportunities for the development and application of spectroellipsometry and related techniques, particularly for real-time diagnostics and control Two recent examples of surface and near-surface analysis illustrate possibilities. reflectance-difference spectroscopy of (001) GaAs growth surfaces under ultra-high vacuum and atmospheric-pressure conditions has provided the first evidence of dimer formation during organometallic chemical vapor chemical deposition (OMCVD). Kinetic-ellipsommetric determination of the composition x of AlxGa1-xAs alloys during chemical beam epitaxy (CBE), with x established by a history-independent, minimal-data approach, has been used to realize the first fully automatic closed-loop feedback system for controlling growth directly. Possible future directions are discussed.
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页码:1 / 8
页数:8
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