Characterization of WCx/B4C multilayers sputtered in reactive argon/methane atmospheres

P. E. Diehl, Mark W. Lund, D. W. Madsen, L. C. McIntyre, David Smith

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Two series of WCx/B4C thin film multilayers were produced by d.c. magnetron sputtering in reactive atmospheres of argon with methane additions (up to 18%). Thin films of boron carbide and tungsten were also deposited separately to provide information about the composition of individual layers. The microstructure and chemistry of the sputtered films were characterized using transmission/high resolution electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, secondary ion mass spectroscopy, and ion beam analysis with MeV helium beams. High-resolution imaging showed that the structure of the individual layers was completely amorphous, although diffraction (electron and X-ray) indicated well-defined layer ordering. Chemical analysis revealed that, in addition to carbon incorporation, the multilayers contained significant levels of hydrogen. As the methane percentage was increased, the amounts of hydrogen and carbon present increased, and oxygen (which was present in all samples) and hydrogen were preferentially incorporated into the boron carbide layer. The peak reflectivity for Mg Kα radiation depended on the methane concentration, with the sample sputtered in a 12% methane atmosphere showing the highest reflectivity of 30%. Annealing of a representative multilayer caused substantial hydrogen loss, and a decrease of the bilayer spacing.

Original languageEnglish (US)
Pages (from-to)57-70
Number of pages14
JournalThin Solid Films
Volume239
Issue number1
DOIs
StatePublished - Feb 15 1994

Fingerprint

Argon
Methane
Hydrogen
Multilayers
methane
argon
atmospheres
Boron carbide
boron carbides
hydrogen
Carbon
reflectance
Thin films
Helium
x rays
carbon
high resolution
thin films
High resolution transmission electron microscopy
Chemical analysis

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Characterization of WCx/B4C multilayers sputtered in reactive argon/methane atmospheres. / Diehl, P. E.; Lund, Mark W.; Madsen, D. W.; McIntyre, L. C.; Smith, David.

In: Thin Solid Films, Vol. 239, No. 1, 15.02.1994, p. 57-70.

Research output: Contribution to journalArticle

Diehl, P. E. ; Lund, Mark W. ; Madsen, D. W. ; McIntyre, L. C. ; Smith, David. / Characterization of WCx/B4C multilayers sputtered in reactive argon/methane atmospheres. In: Thin Solid Films. 1994 ; Vol. 239, No. 1. pp. 57-70.
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