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Proceedings Paper

Improved design of piezoelectric microactuators for HDD
Author(s): Gih Keong Lau; Hejun Du
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Paper Abstract

This paper presents a design of piezoelectric micro-actuator with improved stroke sensitivity and adequate level of lateral resonant frequency for hard disk drive (HDD) application. The improved design employed active piezoelectric elements in push-pull configuration, and two flexural serpentines with inverse-T slits in between them. Instead of adopting conventional design of physical hinge, the two flexural serpentines allow flexural rotations of load beam about an artificial hinge at larger magnification factors. The present design also allows easy adjustment between stroke sensitivity and lateral resonant frequency, which are conflicting with each other, through placement of piezoelectric elements.

Paper Details

Date Published: 14 November 2002
PDF: 7 pages
Proc. SPIE 4935, Smart Structures, Devices, and Systems, (14 November 2002); doi: 10.1117/12.469408
Show Author Affiliations
Gih Keong Lau, Nanyang Technological Univ. (Singapore)
Hejun Du, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 4935:
Smart Structures, Devices, and Systems
Erol C. Harvey; Derek Abbott; Vijay K. Varadan, Editor(s)

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