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Simulation of the Adhesion of Particles to Surfaces

By Stephen Beaudoin1, Ravi Jaiswal1, Caitlin Kilroy1

1. Purdue University

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The removal of micrometer and submicrometer particles from dielectric and metal films represents a challenge in postchemical mechanical polishing cleaning. Proper modeling of the adhesive force between contaminant particles and these films is needed to develop optimal solutions to postchemical mechanical polishing cleaning. We have previously developed and experimentally validated a model to describe the adhesion between spherical particles and thin films. This simulation expands previous models to characterize the adhesive interaction between asymmetrical particles, characteristic of a polishing slurry, and various films. Our simulation accounts for the contact area between particles and substrates, as well as the morphology of the surfaces. Previous models fail to accurately describe the contact of asymmetrical particles interacting with surfaces. By properly accounting for nonideal and geometry and morphology, the simulation predicts a more accurate adhesive force than predictions based upon an ideal van der Waals model. The simulation is compared to experimental data taken for both semi-ideal particle–substrate systems (polystyrene latex spheres in contact with silicon films) and asymmetrical systems (alumina particles in contact with various films).


Stephen Beaudoin School of Chemical Engineering Purdue University

References Journal of Colloid and Interface Science 234, 284–292 (2001)

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Researchers should cite this work as follows:

  • Stephen Beaudoin; Ravi Jaiswal; Caitlin Kilroy (2007), "Simulation of the Adhesion of Particles to Surfaces,"

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