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Discussion on Hamaker Constant
09 May 2008 | | Contributor(s):: Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy
The Hamaker constant is a force constant used for describing the van der Waals (vdW) force. The magnitude of the Hamaker constant reflects the strength of the vdW force between two particles, or between a particle and a substrate. It depends on the material properties of both the interacting...
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Roughness models for particle adhesion
20 Dec 2007 | | Contributor(s):: Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy
The effects of different surface roughness models on a previously developed van der Waals adhesion model were examined. The van der Waals adhesion model represented surface roughness with a distribution of asperities. It was found that the constraints used todefine the asperity distribution on...
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Simulation of the Adhesion of Particles to Surfaces
20 Dec 2007 | | Contributor(s):: Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy
The removal of micrometer and submicrometer particles fromdielectric and metal films represents a challenge in postchemicalmechanical polishing cleaning. Proper modeling of the adhesiveforce between contaminant particles and these films is needed todevelop optimal solutions to postchemical...
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Hamaker Constants in Integrated Circuit Metallization
20 Dec 2007 | | Contributor(s):: Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy
A new method for determining Hamaker constants was examinedfor materials of interest in integrated circuit manufacture. Anultra-high vacuum atomic force microscope and an atomic force microscopeoperated in a nitrogen environment were used to measurethe interaction forces between metals,...
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A Theoretical and Experimental Study of Surface Forces in Adhesion of Particles to Thin Films
20 Dec 2007 | | Contributor(s):: Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy
The interactions between micron- and nano-particles and rough surfaces are of great importance and have numerous applications in surface science and biotechnology. It is essential to have estimates of surface/intermolecular forces between interacting bodies to describe and to manipulate the...