Abstract
Polycrystalline diamond thin films have been deposited on single crystal silicon substrates at low temperatures (⋚ 600 °C) using a mixture of hydrogen and methane gases by high pressure microwave plasma-assisted chemical vapor deposition. Low temperature deposition has been achieved by cooling the substrate holder with nitrogen gas. For deposition at reduced substrate temperature, it has been found that nucleation of diamond will not occur unless the methane/hydrogen ratio is increased significantly from its value at higher substrate temperature. Selective deposition of polycrystalline diamond thin films has been achieved at 600 °C. Decrease in the diamond particle size and growth rate and an increase in surface smoothness have been observed with decreasing substrate temperature during the growth of thin films. As-deposited films are identified by Raman spectroscopy, and the morphology is analyzed by scanning electron microscopy.
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31 January 2011
An Erratum to this paper has been published: https://doi.org/10.1557/JMR.1991.2013
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Ramesham, R., Roppel, T., Ellis, C. et al. Selective and low temperature synthesis of polycrystalline diamond. Journal of Materials Research 6, 1278–1286 (1991). https://doi.org/10.1557/JMR.1991.1278
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DOI: https://doi.org/10.1557/JMR.1991.1278