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Characterization of the Plasma during the Growth of CN x Films by RF Magnetron Sputtering
Author(s) -
Alba de Sánchez N.,
Rincón C.,
Zambrano G.,
Prieto P.
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200007)220:1<697::aid-pssb697>3.0.co;2-q
Subject(s) - analytical chemistry (journal) , sputter deposition , langmuir probe , fourier transform infrared spectroscopy , sputtering , materials science , spectroscopy , plasma , chemistry , thin film , plasma diagnostics , nanotechnology , chemical engineering , ion , organic chemistry , physics , quantum mechanics , engineering
In this work a single Langmuir probe has been used to determine in‐situ the plasma electronic temperature ( T e ) and the electronic density ( η e ) of an rf magnetron sputtering system used to grow CN x films. Sodium chloride substrates and a carbon target (99.999%) in a mixture of Ar/N 2 were used. From the voltage–current characteristics, the electronic temperature in the range of 3 to 11 eV and an electronic density in the range of 10 9 cm –3 , depending on the pressure and the relationship Ar/N 2 in the gas mixture, were determined. These results were correlated with Fourier Transformed Infrared Transmission Spectroscopy (FTIR) of the films. The stress bands in the infrared spectra were found located at 1357, 1589 and 2247 cm –1 ; these bands are related to the primary (C–N), double (C=N) and triple (C≡N) bonds, respectively. On the other hand, the chemical reactions in a discharge are generated basically by electronic impacts; so, knowing the temperature and electronic density, the plasma processes can be controlled during the film preparation to favor CN x deposition.