Flying clearance distribution with thermal flying height control (or thermomechanical actuation) is characterized. Especially, factors contributing to variation in the flying clearance are identified based on the flying height change profiles taken from the burn-in process of hard disk drives and Gage R&R (repeatability and reproducibility) test of touch down repeatability. In addition, the effect of static temperature compensation scheme on the flying clearance distribution is investigated, and the disadvantage of static adaptation to temperature change is identified. In order to avoid early catastrophic head-disk interface failures due to poor static temperature compensation, dynamic clearance adjustment is necessary whenever environmental condition changes. Otherwise, static temperature compensation using the individual temperature sensitivity values of each head needs to be applied.
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e-mail: sungc.lee@samsung.com
e-mail: george.tyndall@wdc.com
e-mail: mike.suk@samsung.com
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April 2010
Technical Briefs
Flying Clearance Distribution With Thermal Flying Height Control in Hard Disk Drives
Sung-Chang Lee,
e-mail: sungc.lee@samsung.com
Sung-Chang Lee
Samsung Information Systems America
, 75 West Plumeria Drive, San Jose, CA 95134
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George W. Tyndall,
e-mail: george.tyndall@wdc.com
George W. Tyndall
Samsung Information Systems America
, 75 West Plumeria Drive, San Jose, CA 95134
Search for other works by this author on:
Mike Suk
e-mail: mike.suk@samsung.com
Mike Suk
Samsung Information Systems America
, 75 West Plumeria Drive, San Jose, CA 95134
Search for other works by this author on:
Sung-Chang Lee
Samsung Information Systems America
, 75 West Plumeria Drive, San Jose, CA 95134e-mail: sungc.lee@samsung.com
George W. Tyndall
Samsung Information Systems America
, 75 West Plumeria Drive, San Jose, CA 95134e-mail: george.tyndall@wdc.com
Mike Suk
Samsung Information Systems America
, 75 West Plumeria Drive, San Jose, CA 95134e-mail: mike.suk@samsung.com
J. Tribol. Apr 2010, 132(2): 024502 (4 pages)
Published Online: March 24, 2010
Article history
Received:
July 19, 2009
Revised:
January 8, 2010
Online:
March 24, 2010
Published:
March 24, 2010
Citation
Lee, S., Tyndall, G. W., and Suk, M. (March 24, 2010). "Flying Clearance Distribution With Thermal Flying Height Control in Hard Disk Drives." ASME. J. Tribol. April 2010; 132(2): 024502. https://doi.org/10.1115/1.4001024
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