Article
Nucleation and Growth of Copper on TiN from Pyrophosphate Solution
Journal of the Electrochemical Society
(2001)
Abstract
In this paper we report on the electrochemical deposition of copper on TiN from pyrophosphate solution. We show that deposition occurs through the instantaneous nucleation of hemispherical clusters followed by diffusion-limited growth over a wide potential range. In this potential regime, the nucleus density increases exponentially with applied potential. The nucleus densities obtained from atomic force microscopy images are in the range of about two orders of magnitude larger than the highest nucleus density observed in fluoroborate solutions. Such high nucleus densities are essential in depositing continuous thin films because coalescence occurs at relatively low coverages. The near-neighbor distances follow Poisson distributions indicating that the nuclei are randomly distributed over the surface.
Disciplines
Publication Date
2001
Citation Information
Peter M. Hoffmann, Aleksandar Radisic, John G. Long and Peter C. Searson. "Nucleation and Growth of Copper on TiN from Pyrophosphate Solution" Journal of the Electrochemical Society (2001) Available at: http://works.bepress.com/peter_m_hoffmann/34/