Effect of dual-stage actuator on positioning accuracy in 10 k rpm magnetic disk drives

We have developed a piezoelectric micro-actuator for dual-stage actuator systems in magnetic disk drives. This microactuator, which drives the head suspension assembly, is based on the shear deformation of piezoelectric elements. We installed the microactuator in one of Fujitsu's 3.5-inch commercial drives for evaluation of the servo system of dual-stage actuator. This paper describes the effect of the dual-stage servo system on positioning accuracy compared with the single actuator.

[1]  Yoshifumi Mizoshita,et al.  A new integrated suspension for pico-sliders (pico-CAPS) , 1996 .

[2]  V. Speriosu,et al.  Spin-valve RAM cell , 1995 .

[3]  Long-Sheng Fan,et al.  Magnetic recording-head positioning at very high track densities using a microactuator-based, two-stage servo system , 1995, IEEE Trans. Ind. Electron..

[4]  S. Koganezawa,et al.  Dual-stage actuator system for magnetic disk drives using a shear mode piezoelectric microactuator , 1999 .

[5]  Yukihiro Uematsu,et al.  A flexural piggyback milli-actuator for over 5 Gbit/in./sup 2/ density magnetic recording , 1996 .

[6]  T. Suzuki,et al.  Shear mode piezoelectric microactuator for magnetic disk drives , 1998 .

[7]  Yu-Chong Tai,et al.  Silicon micromachined electromagnetic microactuators for rigid disk drives , 1995 .

[8]  W. Messner,et al.  Piezoelectric microactuator for dual stage control , 1999 .

[9]  T. Imamura,et al.  Transverse mode electrostatic microactuator for MEMS-based HDD slider , 1996, Proceedings of Ninth International Workshop on Micro Electromechanical Systems.

[10]  Hiroyuki Fujita,et al.  An electrostatic micro actuator for a magnetic head tracking system of hard disk drives , 1997, Proceedings of International Solid State Sensors and Actuators Conference (Transducers '97).

[11]  Y. Soeno,et al.  Piezoelectric piggy-back microactuator for hard disk drive , 1999 .

[12]  Y. Yamaguchi,et al.  A dual-stage magnetic disk drive actuator using a piezoelectric device for a high track density , 1991 .