Heated gimbal for magnetic head to disk clearance adjustment
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United States of America Patent
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Oct 14, 2008
Grant Date -
N/A
app pub date -
Jun 30, 2004
filing date -
Jun 30, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A head gimbal assembly having a suspension and a read/write head is provided. The read write head is attached to a flexure tongue of the suspension. Heating elements on arms of the suspension, set on either side of the suspension tongue, are used to alter flight characteristics of the read/write read such as pitch and roll. Due to differences in the coefficients of thermal expansion of the materials that comprise the arms, the arms bend when heated. Varying the heat output of the heating elements changes the temperatures of the arms, which changes the degree to which the arms are bent. The heating elements can be portions of traces in a trace layer. Control circuitry is provided to control the heating of the heating elements to maintain desired values of the flight characteristics.
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