Thin film magnetic head with trimmed pole tips etched by focused ion beam for undershoot reduction
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United States of America Patent
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Mar 10, 1998
Grant Date -
N/A
app pub date -
Jun 11, 1996
filing date -
Jun 11, 1996
priority date (Note) -
In Force
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Abstract
An air bearing magnetic head is formed with a trimmed head pole tip that includes first and second poles having first and second surfaces respectively, which are coplanar with the air bearing surface of the magnetic head. A pair of leading and trailing bevel surfaces are angularly formed with respect to the first and second surfaces respectively. The bevel surfaces retract portions of the head pole tip away from the surface of a storage medium, and render the head pole tip less sensitive to stray flux, resulting in readback data signals being practically free of undesirable signal undershoots and overshoots. In addition, a minute amount of pole material of the first and second surfaces are trimmed away, thereby defining stepped areas with narrow widths in the first and second poles. The stepped areas enable the magnetic head to record data with narrow and well defined track widths.
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