Ar+ ion beam induced silicide formation mechanism at the Pd-Si interface |
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Authors: | C N Whang H K Kim R Y Lee R J Smith |
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Affiliation: | (1) Department of Physics, Yonsei University, 120 Seoul, Korea;(2) Department of Materials Science and Engineering, Dankook University, 330 Cheonahn, Korea;(3) Department of Physics, Montana State University, 59717 Bozeman, Montana, USA |
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Abstract: | Evaporated palladium films of 45 nm thickness on Si(1 1 1) were irradiated using 78 keV Ar+ ions with doses in the range of 1×1015 to 1.5×1016 cm–2 for the purpose of studying silicide formation. Rutherford backscattering analysis shows that intermixing has occurred across the Pd-Si interface at room temperature. The mixing behaviour increases with increasing dose of the bombarding ions, which agrees well with a theoretical model of isotropic cascade mixing for palladium, and radiation-enhanced diffusion associated with an interstitial mechanism for silicon. |
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