Experimental Study of Dual Heater Slider Touchdown Detectability

Abstract:

With the increase of areal density in hard disk drive (HDD), the mechanical spacing between magnetic head and disk has decreased to sub~1nm. Under such ultra-low spacing, accurate spacing control becomes more important for lowering down the risk of head-disk interference and getting good bit per inch (BPI) performance. Dual-heater slider technology has been considered as a most useful solution. This paper introduces the advantages of dual heater in reading/writing spacing control. Furthermore, as a key issue in precise spacing control, the touchdown detectability of dual-heater slider was also investigated using three TD detection methods under writing and reading mode. Result shows that a single method is difficult to get the best TD detectability under both writing and reading mode. Instead, hybrid method may be a feasible solution.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 468-472
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.468
• Online since: January 2013
• Authors: Da Peng Zhao, Xiong Fei Wei, Yu Wang, Bin Liu, Sheng Xiang Chen, Zhao Qing Xu
• Keywords: Detectability, Dual Heater, Slider, Touchdown

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