Title :
Thin-film piezoelectric DSA for HDD
Author :
Kuwajima, Hideki ; Matsuoka, Kaoru
Author_Institution :
HD Dev. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
A new dual-stage actuator (DSA) for positioning a magnetic head for high-density hard disk drives was proposed and developed. This DSA device is characterized by applying sputter-deposited thin-film lead-zirconate-titanate material (PZT), instead of the previously proposed bulk type actuator. The device performance was found to be outstanding with peak-to-peak head displacement of 1.2 μm at an applied voltage of ±5 V, and suspension resonance frequency higher than 15 kHz, yielding a servo bandwidth of more than several kHz.
Keywords :
disc drives; hard discs; microactuators; piezoelectric actuators; position control; servomechanisms; 1.2 micron; 15 kHz; 5 V; HDD; PZT; PbZrO3TiO3; applied voltage; device performance; dual-stage actuator; high-density hard disk drives; lead-zirconate-titanate material; magnetic head positioning; microactuator; peak-to-peak head displacement; servo bandwidth; sputter-deposited thin-film PZT; suspension resonance frequency; thin-film piezoelectric DSA; Actuators; Hard disks; Magnetic heads; Magnetic materials; Piezoelectric films; Resonance; Resonant frequency; Sputtering; Thin film devices; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801861
