In-situ observation of self-cleansing phenomena during ultra-high vacuum anneal of transition metal nitride thin films: Prospects for non-destructive photoelectron spectroscopy

被引:32
作者
Greczynski, G. [1 ]
Hultman, L. [1 ]
机构
[1] Linkoping Univ, Dept Phys IFM, Thin Film Phys Div, SE-58183 Linkoping, Sweden
关键词
TITANIUM NITRIDE; DIFFUSION-BARRIERS; VANADIUM NITRIDE; TIN; OXIDATION; SPECTRA; GROWTH; TIALN; XPS;
D O I
10.1063/1.4968803
中图分类号
O59 [应用物理学];
学科分类号
摘要
Self-cleansing of transition metal nitrides is discovered to take place during ultra-high vacuum annealing of TiN, NbN, and VN thin films. Native oxide layers from air exposure disappear after isothermal anneal at 1000 degrees C. Also, for TiN, the Ti 2p and N 1s X-ray photoelectron spectra (XPS) recorded after the anneal are identical to those obtained from in-situ grown and analyzed epitaxial TiN(001). These unexpected effects are explained by oxide decomposition in combination with N-replenishing of the nitride during recrystallization. The finding opens up new possibilities for true bonding assignments through non-destructive XPS analyses, thus avoiding artefacts from Ar etching. (C) 2016 Author(s).
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页数:5
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