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Proceedings Paper

Design and fabrication of a piezoelectric instrumented suspension for hard disk drives
Author(s): Stanley Kon; Kenn Oldham; Ryan Ruzicka; Roberto Horowitz
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Paper Abstract

As data densities in computer hard disk drives increase, airflow-induced vibration of the disk drive suspension becomes a major barrier to positioning the read-write head with sufficient precision. One component in reducing these vibrations is a dedicated sensor system for detecting vibration on the sensor arm directly, which enables high-frequency sampling and modal selectivity. In this paper, an efficient method for identifying optimal position and shape of piezoelectric strain gages on a flexible structure is presented, and applied to the steel suspension of a hard disk drive. Zinc oxide deposition processes are adapted to steel substrates, and used to fabricate miniature zinc oxide strain gages at the optimal strain gage location. Substrates with sensors installed were assembled into full disk drive suspensions and tested in a commercial disk drive.

Paper Details

Date Published: 11 April 2006
PDF: 10 pages
Proc. SPIE 6174, Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 617430 (11 April 2006); doi: 10.1117/12.658589
Show Author Affiliations
Stanley Kon, Univ. of California, Berkeley (United States)
Kenn Oldham, Univ. of California, Berkeley (United States)
Ryan Ruzicka, Hutchinson Technology Inc. (United States)
Roberto Horowitz, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 6174:
Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
Masayoshi Tomizuka; Chung-Bang Yun; Victor Giurgiutiu, Editor(s)

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