Plasma-enhanced chemical vapor deposition of nanocrystalline diamond

Nanocrystalline diamond films have attracted considerable attention because they have a low coefficient of friction and a low electron emission threshold voltage. In this paper, the author reviews the plasma-enhanced chemical vapor deposition (PE-CVD) of nanocrystalline diamond and mainly focuses on...

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Veröffentlicht in:Science and technology of advanced materials 2007-10, Vol.8 (7), p.624-634
1. Verfasser: Okada, Katsuyuki
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description Nanocrystalline diamond films have attracted considerable attention because they have a low coefficient of friction and a low electron emission threshold voltage. In this paper, the author reviews the plasma-enhanced chemical vapor deposition (PE-CVD) of nanocrystalline diamond and mainly focuses on the growth of nanocrystalline diamond by low-pressure PE-CVD. Nanocrystalline diamond particles of 200–700 nm diameter have been prepared in a 13.56 MHz low-pressure inductively coupled CH 4/CO/H 2 plasma. The bonding state of carbon atoms was investigated by ultraviolet-excited Raman spectroscopy. Electron energy loss spectroscopy identified sp 2-bonded carbons around the 20–50 nm subgrains of nanocrystalline diamond particles. Plasma diagnostics using a Langmuir probe and the comparison with plasma simulation are also reviewed. The electron energy distribution functions are discussed by considering different inelastic interaction channels between electrons and heavy particles in a molecular CH 4/H 2 plasma.
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subjects Atomic beam spectroscopy
Carbon
Channels
chemical mapping
Chemical vapor deposition
Direct simulation Monte Carlo
Electron energy distribution
Electron energy distribution function
Electron energy loss spectroscopy
High-resolution electron energy loss spectroscopy
Langmuir probe
Low-pressure inductively coupled plasma
Nanocrystalline diamond
Nanocrystals
Plasma diagnostics
Resonance Raman scattering
sp
sp 2/sp 3 chemical mapping
Threshold voltage
UV Raman spectroscopy
title Plasma-enhanced chemical vapor deposition of nanocrystalline diamond
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