Silicide formation with Pd‐V alloys and bilayers
作者:
J. W. Mayer,
S. S. Lau,
K. N. Tu,
期刊:
Journal of Applied Physics
(AIP Available online 1979)
卷期:
Volume 50,
issue 9
页码: 5855-5859
ISSN:0021-8979
年代: 1979
DOI:10.1063/1.326733
出版商: AIP
数据来源: AIP
摘要:
Solid phase reactions in the temperature range between 250 and 600 °C between Si and V‐Pd bilayers as well as alloy layers have been studied by MeV4He+backscattering and x‐ray diffraction techniques. When a Pd layer is interposed between Si and V, the bilayer system starts to react at <300 °C with the formation of Pd2Si. Annealing at higher temperatures (∼600 °C) leads to a uniform layer of VSi2formed on top of the Pd2Si. Reversing the bilayer sequence (Si/V/Pd) raises the reaction temperature of the system to ∼500 °C with V mixing into the Pd layer. Annealing at higher temperature leads to the formation and accumulation of Pd2Si at the interface and a mixed (nonuniform) structure of Pd2Si and VSi2in the outer surface region. For a Pd‐rich alloy (Pd80V20), a reaction started at about 300 °C and produced Pd2Si by depleting Pd from the alloy. This resulted in a mixed structure of Pd2Si and VSi2in the outer region, similar to the final stage of the Si/V/Pd system. For a V‐rich alloy (Pd90V10), the formation temperature of Pd2Si is raised to ∼500 °C and again leads to a mixed structure. The amount of accumulation of Pd2Si at the substrate‐silicide interface increases with the Pd content in the alloy.
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