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Particle and Thin Film Adhesion

Posted 20 Dec, 2007 in Series

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Contributor(s) Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy
Purdue University
Abstract

image The adhesion of micron and sub-micron scale particles to surfaces is of tremendous interest in a wide range of industrial and civilian applications. We measure directly the adhesion of particles to surfaces using atomic force microscopy and develop experimentally-validated, science-based models for the adhesion. The models consider electrostatic, van der Waals, and hydrophobic interactions for rough, deformable particles with nonuniform geometry adhering to rough deformable surfaces in liquid, gaseous, or vacuum environments.

These efforts are currently being applied to improve wafer cleaning and polishing processes in the semiconductor industry, to assist in the detection of weapons and explosives, and to facilitate the development and implementation of biomaterials with optimal surface properties.

credits Stephen Beaudoin School of Chemical Engineering Purdue University
sponsoredby National Science Foundation, Engineering Reseach Center for Environmentally Benign Semiconductor Manufacturing.
Cite this work

If you reference this work in a publication, please cite as follows:

  • Stephen Beaudoin; Ravi Jaiswal; Caitlin Kilroy (2007), "Particle and Thin Film Adhesion," http://pharmahub.org/resources/29.

    BibTex | EndNote

Tags
  1. fast fourier transform
  2. hamaker constants
  3. particle adhesion
  4. surface roughness
  5. thin films
  6. van der waals force

In This Series

  1. Discussion on Hamaker Constant

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    09 May. 2008 | Publications | 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 bodies …

  2. Basic Forces in Particle Adhesion

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    28 Jan. 2008 | Online Presentations | Contributor(s): Stephen Beaudoin

    Particle adhesion to surfaces is important in a wide range of industrial applications. This brief presentation is designed to provide an introduction to the forces that influence particle adhesion in air or liquid environments. It is not designed to provide information at great depth or …

  3. Particle Adhesion

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    25 Jan. 2008 | Tools | Contributor(s): Stephen Beaudoin, dsk  , Ravi Jaiswal, Caitlin Kilroy

    The van der Waals adhesion force between a particle and a substrate in a given medium is simulated for a specified number of interactions.

  4. Roughness models for particle adhesion

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    20 Dec. 2007 | Publications | 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 to define the asperity distribution on …

  5. Simulation of the Adhesion of Particles to Surfaces

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    20 Dec. 2007 | Publications | Contributor(s): Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy

    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 …

  6. Hamaker Constants in Integrated Circuit Metallization

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    20 Dec. 2007 | Publications | Contributor(s): Stephen Beaudoin, Ravi Jaiswal, Caitlin Kilroy

    A new method for determining Hamaker constants was examined for materials of interest in integrated circuit manufacture. An ultra-high vacuum atomic force microscope and an atomic force microscope operated in a nitrogen environment were used to measure the interaction forces between metals, …

  7. A Theoretical and Experimental Study of Surface Forces in Adhesion of Particles to Thin Films

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    20 Dec. 2007 | Publications | 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 nature …

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