NEUTRALIZING FLYING HEIGHT SENSITIVITY OF THERMAL POLE-TIP PROTRUSION OF MAGNETIC SLIDER
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United States of America Patent
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Issued Date -
Oct 29, 2009
app pub date -
Apr 25, 2008
filing date -
Apr 25, 2008
priority date (Note) -
Abandoned
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Abstract
A method for neutralizing the flying height sensitivity associated with thermal pole-tip protrusion (T-PTP) of an air bearing slider comprises creating head material data and air bearing surface (ABS) compensation data, based on which a head/ABS design is created. The head material data comprises at least one material property that is dependent on the manner in which the material is fabricated, such as the coefficient of thermal expansion of a material deposited using a certain deposition process. The ABS compensation data comprises data about how respective ABS features affect air bearing pressure and, therefore, ABS compensation. A protrusion profile is determined for the head/ABS design, and whether or not this protrusion profile meets particular design criteria is then determined. The head/ABS creating and determining process can be iterated if necessary to arrive at a head/ABS design which provides neutral flying height sensitivity to a range of operational temperatures.
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