Head suspension assembly having PZT damper with non-uniform thickness
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United States of America Patent
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Feb 13, 2018
Issued Date -
N/A
app pub date -
Dec 12, 2016
filing date -
Dec 29, 2015
priority date (Note) -
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Abstract
In a gimbal dual stage actuated (GSA) suspension for a disk drive, a viscoelastic damper is disposed between and adhered to the suspension's PZT microactuator and the flexure trace gimbal. The damper is dispensed in fluid form onto the trace gimbal during assembly of the suspension, the PZT is placed onto the damper, and the damper is then hardened leaving it adhered to both the PZT and the trace gimbal. The damper reduces peaks in the frequency response of the PZT actuation, thus allowing higher bandwidth of the servo control loop and increasing the effective read and write speeds for the suspension.
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