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On the Touchdown-Takeoff Hysteresis Observed at the Head-Disk Interface in Hard Disk Drives

[+] Author Affiliations
Rohit P. Ambekar, David B. Bogy

University of California at Berkeley, Berkeley, CA

Paper No. WTC2005-63594, pp. 711-712; 2 pages
doi:10.1115/WTC2005-63594
From:
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME

abstract

The touchdown-takeoff velocity hysteresis observed in hard disk drives during CSS or L/UL tests is analyzed using an experimental approach. Tests similar to L/UL were conducted for different slider-disk combinations at different humidities. Factors affecting the touchdown and takeoff velocity were identified on the basis of their domain of operation. It is concluded that the intermolecular forces and meniscus forces are contributing factors to hysteresis, which is also influenced by disk topography and slider dynamics.

Copyright © 2005 by ASME
Topics: Disks

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