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TECHNICAL PAPERS

Air Film Dynamics for Micro-Textured Flying Head Slider Bearings in Magnetic Hard Disk Drives

[+] Author and Article Information
Norio Tagawa

Department of Mechanical Engineering, Faculty of Engineering, Kansai University, Suita, Osaka 564-8680 Japane-mail: tagawa@ipcku.kansai-u.ac.jp

David B. Bogy

Computer Mechanics Laboratory, Mechanical Engineering, University of California, Berkeley, CA 94720-1740

J. Tribol 124(3), 568-574 (May 31, 2002) (7 pages) doi:10.1115/1.1456084 History: Received March 19, 2001; Revised August 15, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

Menon, A. K., 1999, “Critical Requirement for 100 Gb/in2 Head/Media Interface,” Proceeding of the Symposium on Interface Technology Toward 100 Gb/in2, TRIB-Vol. 9, pp. 1–9.
Hanch, J., Polycarpou, A. A., and Boutaghou, Z. B., 1999, “Tribology of Contact Head/Disk Interface,” Proceeding of the Symposium on Interface Technology Toward 100 Gb/in2, TRIB-Vol. 9, pp. 17–22.
Hu,  Y., and Bogy,  D. B., 1997, “Flying Characteristics of a Slider Over Textured Surface Disks,” IEEE Trans. Magn., 33, No. 5, pp. 3196–3198.
Hu,  Y., and Bogy,  D. B., 1998, “Effects of Laser Textured Disk Surfaces on a Slider’s Flying Characteristics,” ASME J. Tribol., 120, pp. 266–271.
Kim,  J. H., and Shin,  K. H., 1999, “Simulation of the Head/Disk Interface Between Textured Surfaces,” IEEE Trans. Magn., 35, No. 5, pp. 2418–2420.
Tagawa,  N., Hayashi,  T., and Mori,  A., 2001, “Effects of Moving Three-Dimensional Nano-Textured Disk Surfaces on Thin Film Gas Lubrication Characteristics for Flying Head Slider Bearings in Magnetic Disk Storage,” ASME J. Tribol., 123, pp. 151–158.
Mitsuya,  Y., Ohkubo,  T., and Ohta,  H., 1989, “Averaged Reynolds Equation Extended to Gas Lubrication Possessing Surface Roughness in the Slip Flow Regime: Approximate Method and Confirmation Experiments,” ASME J. Tribol., 111, No. 3, pp. 495–503.
Zeng,  Q. H., and Bogy,  D. B., 1999, “Stiffness and Damping Evaluation of Air Bearing Sliders and New Designs with High Damping,” ASME J. Tribol., 121, No. 2, pp. 341–347.
Fukui,  S., and Kaneko,  R., 1988, “Analysis of Ultra-Thin Film Lubrication Based on Linearized Boltzmann Equation: First Report-Derivation of a Generalized Lubrication Equation Including Thermal Creep Flow,” ASME J. Tribol., 110, pp. 335–341.
Zeng,  Q. H., and Bogy,  D. B., 1997, “A Modal Analysis Method for Slider Air Bearing in Hard Disk Drives,” IEEE Trans. Magn., 33, No. 5, pp. 3124–3126.
White,  J. W., 1991, “The Transverse Pressure Contour Slider: Flying Characteristics and Comparison with Taper-Flat and Cross-Cut Type Sliders,” ASME, Adv. in Info. Storage Syst., 3, pp. 1–14.
Mitsuya,  Y., and Ohta,  H., 1991, “Stiffness and Damping of Compressible Lubricating Films Between Computer Flying Heads and Textured Media: Perturbation Analysis Using the Finite Element Method,” ASME J. Tribol., 113, pp. 819–827.
Mitsuya, Y., and Hayashi, T., 1990, “Transient Response of Head Slider When Flying Over Textured Magnetic Disk Media,” Proc. of the Japan International Tribology Conference, Nagoya, Vol. III, pp. 1941–1946.
Mitsuya,  Y., and Hayashi,  T., 1990, “Numerical Study of Film Thickness Averaging in Compressible Lubricating Films Incurring Stationary Surface Roughness,” ASME J. Tribol., 112, No. 2, pp. 230–237.

Figures

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Simulation models for micro-textured flying head slider bearings: (a) transverse micro-textured flying head slider bearings; and (b) longitudinal micro-textured flying head slider bearings.
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Test slider configuration and dimensions
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Pressure profiles for transverse micro-textured flying head slider bearings
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Effect of the transverse micro-texture depth on slider static flying characteristics: (a) flying height; and (b) pitch and roll angle.
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Effect of the transverse micro-texture depth on air film modal frequency
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Effect of the transverse micro-texture depth on air film damping
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Effect of the transverse micro-texture pitch on slider static flying characteristics: (a) flying height; and (b) pitch and roll angle.
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Effect of the transverse micro-texture pitch on air film modal frequency
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Effect of the transverse micro-texture pitch on air film damping

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