ABS design for dynamic flying height (DFH) applications
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United States of America Patent
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Issued Date -
Oct 22, 2009
app pub date -
Apr 21, 2008
filing date -
Apr 21, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A DFH (Dynamic Flying Height) type slider ABS design has significantly improved DFH efficiency and a decreased sensitivity of flying height to both ambient conditions and disk surface variations. This is a result of embedding the read/write head and heater in a micro-pad having a very small surface area. The micro-pad is surrounded by a wing-like structure that projects from a central rail in the ABS. The micro-pad is separated from the central rail by a surrounding trench whose depth can be varied to tune the DFH efficiency. The small surface area of the micro-pad reduces the air pressure at the read/write head and the projecting wings and adjacent topology help to direct the airflow around the micro-pad.
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