Process for formation of epitaxial film

Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering

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20419215, 2041923, C23K 1434

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active

058491635

ABSTRACT:
A process for forming an epitaxial film on a biased substrate by sputtering a target to which a bias voltage and a plasma-generating high-frequency power are applied, wherein the film formation is carried out in an atmosphere having H.sub.2 O, CO and CO.sub.2 partial pressures controlled at 1.0.times.10.sup.-8 Torr, with the substrate temperature maintained in the range of from 400.degree. to 700.degree. C. The epitaxial film obtained by the process has excellent interface characteristics, very low impurity contents, good crystallinity and excellent step coverage, and is suitable for application to semiconductor devices.

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