Particle detachment from disk surfaces of computer disk drives

Chuen Jinn Tsai, David Y.H. Pui, Benjamin Y.H. Liu

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


The air drag force on a deposited spherical particle which is present inside the slider airbearing of a computer disk drive has been found to be very substantial. A critical moment model has been proposed for determining the critical condition to detach a smooth spherical particle from a smooth solid surface. Using the model, it has been found that the detachment of submicron particles from computer disk surface by a slider air-bearing is possible. The critical speed for particle detachment from disk surfaces has been calculated, which depends on the adhesion parameter, surface energy and particle size. This model can be experimentally validated using computer disk drives.

Original languageEnglish (US)
Pages (from-to)737-746
Number of pages10
JournalJournal of Aerosol Science
Issue number6
StatePublished - 1991

Bibliographical note

Funding Information:
Acknowledgements--This research was supported partially by the Graduate School of the University of Minnesota through its Doctoral Dissertation Fellowship during the academic year 1988-1989, Most of the financial support has come from the Particulate Contamination Control Research Consortium at the University of Minnesota. Members of the consortium include Air Products and Chemicals, Inc., Airco/The BOC Group, Applied Materials, Donaldson Co., FSI International, GM/Delco Electronics, IBM Corp., Millipore Corp., Nupro Co., TSI Inc. The supports of the Graduate School, the Minnesota Supercomputer Institute and the consortium members are gratefully acknowledged.

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