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Proceedings Paper

Bias voltage dependence of sp3 fractions of amorphous carbon films prepared by magnetically filtered carbon ion deposition studied by spectroscopic ellipsometry
Author(s): Wensheng Guo
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Paper Abstract

Amorphous carbon films (a-C) attract much attention for years because of its unique properties. However, its properties strongly depend on the preparation conditions. The determination of the sp3-bonded carbon fractions is very crucial. In this paper, a series of a-C films have been prepared on silicon substrates with different bias voltages using magnetic filtered carbon ion deposition. Spectroscopic ellipsometry (SE) has been applied to study these samples over the VIS-NIR spectral range. during the analysis of the measured ellipsometry data, Forouhi and Bloomer model, which was shown to be appropriate for amorphous diamond-like carbon films, is firstly applied to describe a-C films. The thickness and optical constants of a-C films can be obtained. Because our object is to directly determine the sp3-bonded carbon fractions, ia mixed composition film including sp3, sp2 components is assumed to represent the a-C films. Comparison of deduced values from these two models will be given. In order to verify the SE results, results obtained from optical absorption measurements have also been given and compared.

Paper Details

Date Published: 29 November 2000
PDF: 5 pages
Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); doi: 10.1117/12.408329
Show Author Affiliations
Wensheng Guo, Sichuan Univ. (China)

Published in SPIE Proceedings Vol. 4086:
Fourth International Conference on Thin Film Physics and Applications
Junhao Chu; Pulin Liu; Yong Chang, Editor(s)

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