A PZT micro-actuated suspension for high TPI hard disk servo systems

Author

Niu, Yimin ; Guo, Wei ; Guo, Guoxiao ; Ong, Eng Hong ; Sivadasan, K.K. ; Huang, Tony

Author_Institution

Data Storage Inst., Singapore

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2241

Lastpage

2243

Abstract

A piezoelectrically actuated suspension for high TPI (tracks per inch) hard disk drives is presented. Two reinforced piezoelectric microactuators, placed in parallel between the base plate and the spring beam, are used for the secondary actuation. A stroke of 1.2 μm at the head was observed when driven by 30 V. The first torsion and the sway mode frequencies are 6.28 kHz and 10.5 kHz, respectively. In addition, the actuated suspension also has some distinguishing features such as, a C-channel and meanderline springs for shock-resistance enhancement. A possible vertical motion of the suspension is helpful for contact-start-stop (CSS) friction reduction and gramload adjustment. It also makes the suspension free from twist due to two layers of piezoelectric plates on both sides of the beam. As a result, the developed actuated suspension can be used to support high TPI hard disk drive servo systems

Keywords

disc drives; friction; lead compounds; microactuators; piezoelectric actuators; servomechanisms; torsion; 10.5 kHz; 30 V; 6.28 kHz; C-channel; PZT; PbZrO3TiO3; base plate; contact-start-stop friction reduction; gramload adjustment; hard disk servo systems; meanderline springs; micro-actuated suspension; piezoelectrically actuated suspension; reinforced piezoelectric microactuators; secondary actuation; shock-resistance enhancement; spring beam; sway mode frequencies; torsion; vertical motion; Cascading style sheets; Electric shock; Friction; Hard disks; Magnetic heads; Magnetic levitation; Memory; Microactuators; Servomechanisms; Springs;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908377

Filename

908377