Slider Overcoats for Enhanced Interface Durability in Magnetic Recording Applications

[+] Author and Article Information
S. K. Ganapathi

Applied Magnetics Corporation, 75 Robin Hill Road, Goleta, CA 93117

Timothy A. Riener

Quantum Corporation, 500 McCarthy Blvd., Milpitas, CA 95035

J. Tribol 117(1), 86-93 (Jan 01, 1995) (8 pages) doi:10.1115/1.2830611 History: Received March 04, 1994; Revised June 16, 1994; Online January 24, 2008


The effects on tribological performance of air bearing surface overcoats on magnetic recording sliders are presented. Both component level and disk drive level testing indicate that significant performance enhancements are afforded by the overcoat, and that both stiction/friction and wear of the head/disk interface are reduced, thus increasing interface durability. The degradation in electrical performance of the heads due to the presence of the overcoat is shown to be consistent with that predicted by the Wallace equation. In addition, it is shown that the performance enhancements of the overcoat are achieved only in the presence of lubricant on the disk surface, suggesting that the overcoat lubricant interaction may be more benign than the interaction of the lubricant with the slider material.

Copyright © 1995 by The American Society of Mechanical Engineers
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