Glide Avalanche Prediction From Surface Topography

[+] Author and Article Information
B. Marchon, D. Kuo, S. Lee, J. Gui, G. C. Rauch

Seagate Technology, 47010 Kato Road, Fremont, CA 94538

J. Tribol 118(3), 644-650 (Jul 01, 1996) (7 pages) doi:10.1115/1.2831586 History: Received February 27, 1995; Revised July 26, 1995; Online January 24, 2008


As the head/disk spacing continues to decrease, the demand for thin film disks with glide capability below 20 nm becomes more pressing. As a consequence, the design of such media requires an ever increasing control of the surface topography to a nanometer level. This paper is an attempt to analytically predict the intrinsic glide capability of a textured disk, given the knowledge of its peak height distribution, as measured by a surface profilometer. This model also takes into account the long wavelength component of the topography, or waviness, by treating it as an independent variable leading to a broadening of the peak height distribution. This analysis also predicts relationships between various roughness parameters. Experimental data obtained on a total of 27 media surfaces of various types compare favorably to the theoretical predictions.

Copyright © 1996 by The American Society of Mechanical Engineers
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