Co-deposition process of RF-Sputtering and RF-PECVD of copper/carbon nanocomposite films

Nanoparticle copper/carbon composite films were prepared by co-deposition of RF-Sputtering and RF-PECVD method from acetylene gas and copper target. We investigate deposition process in the region where by changing pressure, the process converts to physical sputtering mode in constant power regime a...

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Bibliographic Details
Published in:Surface & coatings technology 2008-03, Vol.202 (12), p.2731-2736
Main Authors: Ghodselahi, T., Vesaghi, M.A., Shafiekhani, A., Baradaran, A., Karimi, A., Mobini, Z.
Format: Article
Language:English
Subjects:
AFM
Applied sciences
Copper nanoparticle-carbon coating
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Methods of deposition of films and coatings
film growth and epitaxy
Physics
Production techniques
RBS
RF sputtering
Surface treatment
Surface treatments
XPS
XRD
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Summary:Nanoparticle copper/carbon composite films were prepared by co-deposition of RF-Sputtering and RF-PECVD method from acetylene gas and copper target. We investigate deposition process in the region where by changing pressure, the process converts to physical sputtering mode in constant power regime and at a critical pressure between 1.5 to 3 Pa. The estimated value of mean ion energy at this critical point of pressure is close to threshold energy of physical sputtering of copper atoms by acetylene ions. By utilizing this property and by setting initial pressure from 1.3 to 6.6 Pa, nanoparticles copper/carbon composite films were grown with different copper content. The Copper content of our films was obtained by Rutherford Back Scattering (RBS) and it varied from 2% to 97%. The copper content of the surface was obtained by X-ray Photoelectron Spectroscopy (XPS). The results of XPS at different stages of the growth and copper oxidization confirm our suggested mechanism of deposition. Atomic force microscopy (AFM) image and X-ray diffraction (XRD) indicated that copper nanoparticles were formed in our films.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2007.10.009