Back to Search
Start Over
Properties and structures of diamond-like carbon film deposited using He, Ne, Ar/methane mixture by plasma enhanced chemical vapor deposition
- Source :
- Journal of Applied Physics. 87:8122-8131
- Publication Year :
- 2000
- Publisher :
- AIP Publishing, 2000.
-
Abstract
- Diamond-like carbon (DLC) films have been deposited by a magnetically enhanced plasma (MEP) chemical vapor deposition (CVD) system. The properties and structures of DLC films deposited by MEP-CVD using various gases (methane, He/methane, Ne/methane, and Ar/methane) were studied. The mechanical properties in terms of hardness, Young’s modulus and stress, and optical properties in terms of optical band gap and refractive index were enhanced by adding inert gas in methane plasma. The magnitude of the effects on the properties for various inert gases was found as Ne, Ar, and He, on the surface roughness was found as Ar, Ne, and He. The Raman characteristic shows a dependence of the bias voltage and inert-gas/methane ratio, as well as the inert gases dilution. The Raman spectroscopy analysis indicates that the changes of properties of the DLC films are due to the structural changes, such as sp2 and sp3 content in the films prepared under various deposition conditions. The films deposited in Ne/methane show the lowest disordered (D) peak to graphitic (G) peak intensity ratio, the D and G peak positions; highest stress, hardness, Young’s modulus, optical band gap, and lowest reflective index. The films deposited in Ar/methane show the lowest surface roughness. This was proposed due to the optimum balance in the inert gas ionization potential and atomic mass.
- Subjects :
- Materials science
Diamond-like carbon
Analytical chemistry
General Physics and Astronomy
chemistry.chemical_element
Diamond
Chemical vapor deposition
engineering.material
Methane
chemistry.chemical_compound
symbols.namesake
chemistry
Plasma-enhanced chemical vapor deposition
engineering
symbols
Raman spectroscopy
Inert gas
Carbon
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 87
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........fae466b2f52aa33281abdf73c36b3fe5
- Full Text :
- https://doi.org/10.1063/1.373507