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Low‐temperature anodic oxidation in a ’’cold’’ plasma (multipole) of metals like Al or Ta through a thin calcia‐stabilized zirconia (CSZ) film is possible. Thick (≳300 nm) stoichiometric metal oxides are formed under the CSZ with high growth rates (20–30 nm/min). Anodization of bare metals under similar plasma conditions leads to very low oxidation rates (≪1 nm/min). The CSZ film, which acts as a selective oxygen filter, has thus greatly enchanced the oxidation rate. Low‐temperature (≪50 °C) plasma anodization of silicon (typical rates 2–3 nm/min) is also possible through a thin CSZ film.
Published in:
Applied Physics Letters
(Volume:38
,
Issue:
1
)
Date of Publication: Jan 1981