期刊
JOURNAL OF APPLIED PHYSICS
卷 105, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3098254
关键词
adsorption; atomic force microscopy; carbon; hardness; Monte Carlo methods; surface diffusion; surface roughness; vacuum deposited coatings; vacuum deposition; X-ray photoelectron spectra; X-ray reflection
资金
- Information Storage Industry Consortium (INSIC)
- Extremely High Density Recording (EHDR) Program
- Computer Mechanics Laboratory (CML)
- University of California, Berkeley
Filtered cathodic vacuum arc was used to synthesize ultrathin carbon films on silicon substrates. The depth profiles, near-surface chemical composition, fractions of tetrahedral (sp(3)) and trigonal (sp(2)) carbon atom hybridizations, roughness, and hardness of the carbon films were determined from Monte Carlo (T-DYN) simulations and x-ray reflectivity (XRR), x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and surface force microscopy (SFM) measurements, respectively. Films of thickness of only a few nanometers possessed smaller sp(3) fractions than much thicker films. The effective hardness was found to depend on the sp(3) fraction and silicon-carbon composition profile. The formation of different carbon atom bonds, film growth mechanisms, and optimum process conditions for synthesizing ultrathin carbon films are interpreted in the context of T-DYN, XRR, XPS, AFM, and SFM results and surface bombardment, adsorption, and diffusion mechanisms.
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