6
cm-2 for non-scratched silicon. The maximum value of the nucleation density was over 1011 cm-2 on mirror-polished Si(100) at -300 V. The transportation process of the ion flux from the filament to the substrate is discussed in detail for biased substrates. The nucleation enhancement by the positive bias is believed to be a result of the increased impingement of the electrons emitted from the filament to the substrate surface. The studies have shown that electron emission from diamond plays a key role in negative-bias-enhanced nucleation by accelerating the dissociation of molecular hydrogen and hydrocarbon species into various free radicals and causing a plasma to be ignited near the substrate surface. The negative bias pretreatment is also a critical step in growing heteroepitaxial diamond films: the enlargement of the area of diamond clusters in contact with the substrate enhances the orientated growth of the films.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 18 October 1996/Accepted: 4 February 1997
Rights and permissions
About this article
Cite this article
Wang, W., Sánchez, G., Polo, M. et al. Nucleation and initial growth of diamond by biased hot filament chemical vapour deposition . Appl Phys A 65, 241–249 (1997). https://doi.org/10.1007/s003390050573
Issue Date:
DOI: https://doi.org/10.1007/s003390050573