Title :
Dynamic Writer Pole-Tip Protrusion Compensation by Thermal Actuator
Author :
Ong, Chun-Lian ; Ang, Shiming ; Yuan, Zhimin
Author_Institution :
Data Storage Inst., A*Star, Singapore, Singapore
Abstract :
As the head-disk flying clearance reduces to about 1 ~ 2 nm during read-write operation, the write current induced writer pole-tip protrusion (W-PTP) may affect the reliability of the hard disk drive (HDD) performance. The dynamic temporal heating and cooling profile of thermal actuator and the W-PTP are investigated using the Wallace spacing loss method. The work suggests that the dynamic W-PTP can be closely compensated by the dynamic cooling of thermal actuator.
Keywords :
actuators; disc drives; hard discs; semiconductor device reliability; Wallace spacing loss method; cooling profile; dynamic cooling; dynamic temporal heating; dynamic writer pole tip protrusion compensation; hard disk drive performance; head disk flying clearance; read write operation; reliability; thermal actuator; Cooling; Current measurement; Eddy currents; Heating; Logic gates; Magnetic heads; Writing; Head disk clearance; head-disk-interface (HDI); pole tip protrusion; thermal flying height control (TFC); thermal protrusion;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2204728
