Secondary cluster ions Ge2− and Ge3−for improving depth resolution of SIMS depth profiling of GeSi/Si heterostructures

被引:0
|
作者
M. N. Drozdov
Yu. N. Drozdov
D. N. Lobanov
A. V. Novikov
D. V. Yurasov
机构
[1] Russian Academy of Sciences,Institute for Physics of Microstructures
来源
Semiconductors | 2010年 / 44卷
关键词
Depth Profile; Depth Resolution; SiGe Layer; Semiconductor Heterostructures; Crater Bottom;
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学科分类号
摘要
New possibilities of improving depth resolution of SIMS depth profiling of GeSi/Si heterostructures using a TOF.SIMS-5 spectrometer are discussed. Contributions of ion sputtering artifacts and instrumental effects to depth resolution were analyzed in detail using a Talysurf CCI-2000 optical profilometer to control the shape and roughnesses of the sputtering crater bottom. It was found that the use of Cs+ ions for sputtering makes it possible to minimize roughness development during depth profiling of GeSi/Si structures to depths of 1–1.5 μm. It was shown that the use of secondary cluster ions Ge2− and Ge3− instead of Ge1− and Ge+ allows narrowing the transition regions in measured profiles.
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页码:401 / 404
页数:3
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