Studies of SiGe alloy surfaces after reactive ion etching

被引:3
|
作者
Richter, HH [1 ]
Wolff, A [1 ]
Tillack, B [1 ]
Kruger, D [1 ]
Hoppner, K [1 ]
Eggs, C [1 ]
机构
[1] UNIV GREIFSWALD,FACHBEREICH PHYS,D-17489 GREIFSWALD,GERMANY
来源
关键词
D O I
10.1002/pssa.2211520212
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Reactive ion etching a characteristics of epitaxial Si1-xGex layers in SiCl4/Cl-2/N-2 plasma are investigated by different diagnostic techniques, such as Auger electron spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscopy. Surface morphology and stoichiometry are influenced by the dry etching process. A slight Ge enrichment at the etched SiGe films is explained by the different volatility of the corresponding chlorides. Moreover, a procedure which allows an exactly determined etch stop in a thin buried SiGe alloy - as a necessary requirement for the following surface analysis - is introduced.
引用
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页码:443 / 450
页数:8
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