Journal of Mechanical Science and Technology

  • 제15권3호
  • /
  • Pages.281-290
  • /
  • 2001
  • /
  • 1738-494X(pISSN)
  • /
  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

The Effects of Slider Design on Thermal Asperity Rejection Capability

  • 발행 : 2001.03.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Particle contamination has been an ongoing problem affecting the reliability of the magnetic hard disk drives. Especially the recent use of MR head requires much tighter control of particle contamination due to thermal asperity (TA) phenomenon. In this study, the effects of slider air bearing surface design of TA reduction capability were investigated by manufacturing two types of sliders. Numerical methods were used to simulate the motion of particles in the head/media interface. Experiments were conducted to verify the results predicted by the numerical simulation. Drives were built and exposed to particle contamination using a particle injection chamber, which turned out to be a very simple and reliable particle generation method over conventional aerosol technique. Then the number of TA generated in the drives was recorded and compared. Also the contacts between slider and particles were investigated by acoustic emission study. It was found that a new ABS design, which has aerodynamic U-shaped rail and central flow passage, was beneficial in reducing the particle contamination on the slider.

키워드

참고문헌

  1. Altshuler, K. J., Harrison, J. C. and Ackerman, E., 1998, 'The Physical Effects of Intra-Drive Particulate Contamination on the Head-Disk Interface in Magnetic Hard Disk Drives,' ASME Journal of Tribology, 98-TRIB-47
  2. Bergin, M. and Koka, R., 1992, 'Measurement of Particulate Contamination Levels in Disk Drives with Aerosol Counters,' Adv. Infor. Storage Syst., Vol.5. pp. 387-395, 1992
  3. Hiller, B. and Brown, B., 1992, 'Interaction of Individual Alumina Particles with the Head-Disk Interface at Various Velocities,' Adv. Infor. Storage Syst.,Vol. 5, ASME, pp. 351-361, 1992
  4. Hiller, B. and Singh, G. P., 1994, 'Mechanism for Formation of Whiskers on a Flying Magnetic Recording Slider,' IEEE Trans. on Magnetics, Vol. 33, pp. 1499-1503 https://doi.org/10.1109/20.305553
  5. Klaassen, K. B. and van Peppen, J. C. L., 1997, 'Electronic abatement of thermal interference in (G)MR head Output Signals,' IEEE Trans on, Magnetics. Vol. 33, pp. 2611-2616 https://doi.org/10.1109/20.617425
  6. Koka, R., 1989, 'Effects of Fine Particles on the Slider Disk Interface in Rigid Disk Drives,' Tribology and Mechanics of Magnetic Storage Systems, STLE Publication SP-26, Vol. 4, pp. 40-46
  7. McMillan, T. C., Swain, R. C. and Talke F. E., 1995, 'Investigation of Slider Take-off Velocity Using the Acoustic Emission Frequency Spectrum,' IEEE Trans. on Magnetics, Vol. 31, pp.2973-2975 https://doi.org/10.1109/20.490207
  8. McMillan, T. C. and Talke, F. E., 1998, 'Identification of Slider/Disk Contacts Using the Energy of the Acoustic Emission Signal,' IEEE Trans. on Magnetics, Vol. 34, pp. 1819-1821 https://doi.org/10.1109/20.706717
  9. Sawatzky, E., 1998, 'Thermal Asperites: MR Heads Face New Dangers,' Data Storage, Feb., pp.49-54
  10. Wang, S., Viswanathan, K. V., Liu, H., 'Acoustic Emission of Laser Textured Disks Influenced by Bump Excitation,' 1998, IEEE Trans. on Magnetics, Vol. 34, pp.1813-1815 https://doi.org/10.1109/20.706715
  11. Zhang, L., Koka, R., Yuen Y. and Lam E., 1999, 'Particle Induced Damage on Heads and Discs Due to Fine Particles of Different Materials,' IEEE Trans. on Magnetics, Vol. 35, pp. 927-932 https://doi.org/10.1109/20.753810
  12. Zhang, S. and Bogy, D. B., 1997, 'Slider Designs for Controlling Contamination,' ASME Journal of Tribology, Vol. 119, pp. 537-540