Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Effect of Characteristics of Disk Surface on Particle Adhesion and Removal in a Hard Disk Drive

HDD 내 디스크 표면 특성이 미세입자의 부착 및 이탈에 미치는 영향

  • Published : 2000.12.01
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Abstract

The use of magnetoresistive (MR) head requires much tighter control of particle contamination in a drive since loose particles on the disk surface will generate thermal asperities (TA). In this study, a spinoff test was performed to investigate the adhesion and removal capability of a particle to disk surface. Numerical simulation was also performed to investigate dominant factor of particle detachment and to support experimental results. It was shown that particles are detached from the disk surface by the moment derived from the centrifugal force and the drag force and that the centrifugal force and capillary force are the dominant force, which determines spin-off of a particle on the disk surface. Removal of particles smaller than several micrometers, which are the main source of TA generation, is extremely difficult since the adhesion forces exceed the centrifugal force. Lubricant types and manufacturing process also influence the particle removal. Lower bonding ratio and lower viscosity of the lubricant will help to increase the removal rate of the particles from the disk surface.

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References

  1. IEEE Trans. Magnetics v.30 Mechanism for Formation of Whiskers on a Flying Magnetic Recording Slider Hiller, B.;Singh, G. P.
  2. IEEE Trans. Magnetics v.33 Debris Growth and Migration in the Slider-Disk Interface Zhu, L.;Fu, Y.
  3. IEEE Trans. Magnetics v.35 Thermal Asperity Trends Stupp, S. E.;Baldwinson, M. A.;McEwen, P.
  4. Data Storage Thermal Asperites: MR Heads Face New Dangers Sawatzky, E.
  5. J. Tribology v.114 Magnetic Head-Media Interface Temperatures-Part 3 : Application to Ridgid Disks Bhushan, B.
  6. IEEE Trans. Magnetics v.33 Motion of Particles in a Slider/Disk Interface Including Lift Force and Wall Effect Zhang, S.;Bogy, D.
  7. IEEE Trans. Magnetics v.35 The Formation and Reduction of New TA at a Head/Disk Interface Li, Y.
  8. J. Tribology STLE The Spin-off of Particles on a Magnetic Disk Li, Y.;Sharma, V.
  9. Handbook of Micro/Nano Tribology Bhushan, B.
  10. Tribology Trans. v.38 A Meniscus Model for Optimization of Texturing and Liquid Lubrication of Magnetic Thin-Film Rigid Disk Gao, C.;Tian, X.;Bhushan, B.
  11. Chem. Eng. Sci. v.23 A Sphere in Contact with a Plane Wall in a Slow Linear Shear Flow O'nell, M. E.
  12. Aerosol Technology Hinds, W. C.
  13. Boundary-Layer Theory Schichting
  14. J. Aerosol Sci. v.28 no.4 Adhesion Moment Model for Estimating Particle Detachment from a Surface Ziskind, G.;Fichman, M.;Gutfinger, C.
  15. Ph. D. Thesis A Study of Particle Ohenomena in Computer Disk Drives Tsai, C. J.
  16. Aerosol Sc. Tech. v.15 Elastic Flattening and Particle Adhesion Tsai, C.J.;Pui, D. Y. H.;Liu, B. Y. H.