Interface formation in W/Si multilayers studied by Low Energy Ion Scattering

被引：9
作者：
Zameshin, A. A. [1 ]
Medvedev, R., V [1 ]
Yakshin, A. E. [1 ]
Bijkerk, F. [1 ]
机构：
[1] Univ Twente, MESA Inst Nanotechnol, Ind Focus Grp XUV Opt, Enschede, Netherlands
来源：
THIN SOLID FILMS | 2021年 / 724卷
关键词：
Compendex;
D O I：
10.1016/j.tsf.2021.138569
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We studied the formation of interfaces in W/Si multilayer structures deposited by magnetron sputtering. In vacuo Low Energy Ion Scattering Spectroscopy was used to determine the materials growth profile with a close to atomic resolution. For that purpose, bi-layer structures, W-on-Si and Si-on-W were grown, with Si being deposited using Ar as the sputter gas and W being deposited in either Ar or Kr. The measurements revealed strongly asymmetric interfaces, with W-on-Si being significantly broader than Si-on-W. However, no difference was found in the W-on-Si interface width depending on the sputter gas, Ar or Kr, used for W deposition, suggesting that it is not a ballistic effect of the backscattered gas ions that is responsible for the wider W-on-Si interface. However, strong surface segregation of Si atoms upon the deposition of W in Kr on Si was observed. Mechanisms responsible for the observed effects are discussed.
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页数：8
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