Physics – Condensed Matter – Materials Science
Scientific paper
2011-12-09
Physics
Condensed Matter
Materials Science
Scientific paper
This Letter reports an anomaly of film porosity dependence on deposition rate during physical vapor deposition - the porosity increases as deposition rate decreases. Using glancing angle deposition of Cu on SiO2 substrate, the authors show that the Cu film consists of well separated nanorods when the deposition rate is 1 nm/second, and that the Cu films consists of a more uniform (or lower porosity) film when the deposition rate is 6 nm/second; all other deposition conditions remain the same. This anomaly is the result of interplay among substrate non-wetting, density of Cu nuclei on the substrate, and the minimum diameter of nanorods.
Baldwin Kevin J.
Huang Hanchen
Misra Amit
Stagon Stephen P.
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