Effects of Laser Textured Disk Surfaces on a Slider’s Flying Characteristics

[+] Author and Article Information
Yong Hu

Quinta Corporation, 1870 Lundy Avenue, San Jose, CA 95131

David B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720

J. Tribol 120(2), 266-271 (Apr 01, 1998) (6 pages) doi:10.1115/1.2834421 History: Received August 27, 1996; Revised April 01, 1997; Online January 24, 2008


Recently, laser texturing has captured the attention of head/media interface engineers in the hard disk drive industry because it provides precision in the landing zone placement while eliminating the transition zone of a mechanically textured landing zone. It also offers excellent tribological performance in terms of low CSS stiction and good durability. These advantages make it the solution of choice for high-end magnetic hard disk drives. This paper models the effects of laser bumps and laser textured disk surfaces on the Headway AAB slider’s flying characteristics. Two commonly used laser bump profiles (“Sombrero” and “Volcano” types) and various texture patterns are numerically generated in the simulator. The slider’s dynamic responses to these moving laser bumps and textures under two outer rail flying conditions are simulated, and the effects of various bump/texture parameters on the slider’s fly height, pitch, roll and their modulations are discussed. The laser texture mechanism is explained by examining the air bearing pressure profiles induced by the moving laser textures.

Copyright © 1998 by The American Society of Mechanical Engineers
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