Air Film Dynamics for Micro-Textured Flying Head Slider Bearings in Magnetic Hard Disk Drives
Author:
Tagawa Norio1, Bogy David B.2
Affiliation:
1. Department of Mechanical Engineering, Faculty of Engineering, Kansai University, Suita, Osaka 564-8680 Japan 2. Computer Mechanics Laboratory, Mechanical Engineering, University of California, Berkeley, CA 94720-1740
Abstract
This paper describes the air film dynamics for micro-textured flying head slider bearings in magnetic hard disk drives and it discusses their ability to increase the air film damping. In order to study the effects of micro-textures on air film dynamic characteristics of flying head slider bearings, two-dimensional micro-textures are modeled as deterministic rectangular models in the transverse and longitudinal directions. Dynamic analysis of these micro-textured flying head slider bearings is carried out by computing the impulse responses of the sliders and applying the modal analysis method to obtain their modal frequencies, damping ratios, and mode shapes. It is found that micro-textures on air bearing surfaces in the transverse direction have very significant effects and increase the air film damping of the slider’s three vibration modes but do not affect the air film stiffness. The same is not true for micro-texture in the longitudinal direction. The effects of transverse micro-textures’ spacing and depth on the air film dynamics are also numerically investigated in detail. The optimum values for high air film damping ratios are obtained. It is found that transverse micro-textures having small spacing are not very effective, being equivalent to the surface roughness effect.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference14 articles.
1. 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. 2. 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. 3. 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. 4. 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. 5. 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.
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