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Quantitative Analysis of Chemically-Enhanced Sputtering during Ion Beam Deposition of Carbon Nitride Thin Films

Published online by Cambridge University Press:  03 September 2012

H. Hofsäss
Affiliation:
Universität Konstanz, Fakultät für Physik, Postfach 5560, D-78434 Konstanz, Germany
C. Ronning
Affiliation:
Universität Konstanz, Fakultät für Physik, Postfach 5560, D-78434 Konstanz, Germany
H. Feldermann
Affiliation:
Universität Konstanz, Fakultät für Physik, Postfach 5560, D-78434 Konstanz, Germany
M. Sebastian
Affiliation:
Universität Konstanz, Fakultät für Physik, Postfach 5560, D-78434 Konstanz, Germany
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Abstract

The sputter losses during growth of carbon nitride thin films using mass selected ion beam deposition of C+ and N+ ions with energies between 20 eV and 500 eV are studied. Depending on the ion energy 35 – 100 % of C+ but only 3 – 35 % of N+ ions are incorporated in the films. Thus the films are always strongly nitrogen-deficient. To suppress the preferential loss of nitrogen we introduce the concept of continuously growing surface protective layers. Starting from a diamond-like carbon film as substrate, carbon nitride films are deposited using 100 eV 12C+ and 1 keV 14N+ ions, so that the growing films are always covered with a 1–2 rm thick protective layer of amorphous carbon. In this case we observe an increased nitrogen incorporation yielding to films with average film composition of C2N.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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