Method for fabricating a pole tip in a magnetic transducer using feed-forward and feedback
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United States of America Patent
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Aug 14, 2007
Grant Date -
Mar 23, 2006
app pub date -
Sep 20, 2004
filing date -
Sep 20, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods for fabricating pole piece tips for a magnetic transducer are disclosed. The ion-milling operations for trimming P2 and notching P1 are controlled using feed-forward and feedback. The preferred method of the invention includes steps for setting four time values used in different phases of the ion-milling process based on feed-forward and feedback of measured values including the P2 width measured in the mask, multiple P2B measurements and measurement of the notch depth.
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