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Characterization and Optical Investigation of Diamondlike Carbon Prepared by Electron Cyclotron Resonance Plasma

Published online by Cambridge University Press:  31 January 2011

Xiao-Ming He ,
S-T. Lee ,
I. Bello ,
A. C. Cheung ,
W. Z. Li ,
D. S. Chiu ,
Y. W. Lam ,
C. S. Lee ,
K. M. Leung  and
X. T. Zhou
Xiao-Ming He
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
S-T. Lee
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
I. Bello
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
A. C. Cheung
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
W. Z. Li
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
D. S. Chiu
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
Y. W. Lam
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
C. S. Lee
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
K. M. Leung
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
X. T. Zhou
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
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Abstract

Diamondlike carbon (DLC) films have been prepared on radio-frequency (rf) biased substrates maintained at low temperature (∼60 °C) using electron cyclotron resonance CH4 –Ar plasma. The structures of the resultant films were characterized by Fourier transform infrared (FTIR), Raman, and ultraviolet/visible (UV/VIS) spectrometry. The studies revealed that the deposited structures were DLC films with sp3/sp2 bond hybridization, extremely high hardness (>3000 kgf/mm2), and high electrical resistivity (up to 1014 Ω cm). The DLC films deposited on colorless (transparent) polymer plastics were examined to determine visible light transparencies and optical bandgaps. The results indicate that electron cyclotron resonance (ECR) plasma processing with low negative rf bias, low deposition temperature, and suitable CH4/Ar gas composition can form optically visible light transparent and hard protective DLC films on polymer plastic surfaces.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 4 , April 1999 , pp. 1617 - 1625
Copyright
Copyright © Materials Research Society 1999

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