Abstract
We have modeled the gas-phase chemistry of a typical radio frequency CH4/Ar plasma used for the deposition of diamond and diamond-like carbon films. Our simulations show that the most abundant carbon containing radical is CH3 in pure methane discharges, but it is the carbon dimer C2 in discharges of methane highly diluted by argon. Thus we propose that the gaseous precursor of the film is CH3 in methane plasmas, and C2 in CH4/Ar plasmas. This proposal resolves outstanding discrepancies and is consistent with recent experiments demonstrating the deposition of diamond from hydrogen deficient plasmas.
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References
J.C. Angus and C.C. Hayman: Science241 (1988) 913.
J.M. Albella et al.: J. Appl. Phys.74 (1993) 3752.
D.M. Gruen, C.D. Zuiker, A.R. Krauss, X. Pan: J. Vac. Sci. Technol. A13 (1995) 1628.
C. Riccardi, R. Barni, F. DeColle, M. Fontanesi: IEEE Trans. On Plasma Science28 (2000) 278.
W. Zhu et al.: J. Appl. Phys.68 (1990) 1489.
H.C. Shih et al.: Diamond Relat. Mater.2 (1993) 531.
P. Tosi, D. Bassi, B. Brunetti, F. Vecchiocattivi: Int. J. Mass Spect. Ion Proc.149/150 (1995) 345.
T.G. McCauley, D.M. Gruen, A.R. Krauss: Appl. Phys. Lett.73 (1998) 1646.
SIGLO Dtabase, http://www.csn.net/~leanne/index.htm
A. Rhallabi and Y. Catherine: IEEE Trans. On Plasma Science19 (1991) 270.
H. Toyoda, H. Kojima, H. Sugai: Appl. Phys. Lett.13 (1989) 1292.
G. Sundström et al.: Science263 (1994) 785.
J. Semaniak et al.: Astrophys. J.498 (1998) 886.
KINEMA Database, http://www.csn.net/~morgan/database.htm
D. Edelson, D. Flamm, J. Appl. Phys.56 (1984) 1522.
GAPHYOR Database, http://www.lpgp23.lpgp.u-psud.fr/
NIST Database, http://www.nist.gov/cstl/div386/ckmech.htm
The list is available from the authors, at http://pcpllab1.mi.infn.it/gamberalewww/chem/rate.ps
N. Mutsukura, K. Yoshida: Diamond Rel. Mater.5 (1996) 919.
Y.S. Han, Y.K. Kim, J.Y. Lee: Thin Solid Films310 (1997) 39.
A.N. Goyette et al.: J. Vac. Sci. Technol. A16 (1998) 337.
A.N. Goyette et al.: J. Phys. D31 (1998) 1975.
A.V. Palnichenko et al.: Nature402 (1998) 162.
N. Mutsukura and K. Saitoh: J. Vac. Sci. Technol. A14 (1996) 2666.
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Riccardi, C., Barni, R., Fontanesi, M. et al. Ar doping of CH4 plasmas for carbon film deposition. Czech. J. Phys. 50 (Suppl 3), 389 (2000). https://doi.org/10.1007/BF03165916
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DOI: https://doi.org/10.1007/BF03165916