Optimized write pole flare angle for side shield or semi side shield PMR writer application
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United States of America Patent
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-
Jan 10, 2012
Grant Date -
May 5, 2011
app pub date -
Jan 4, 2011
filing date -
Apr 13, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Improved writability and a reduction in adjacent track erasure are achieved in a PMR writer with a large flare angle of 45 and 90 degrees in the main write pole and a full side shield or partial side shield configuration around the narrow write pole section and write pole tip. A trailing shield is formed above the write pole's top surface and a full or partial side shield section is spaced a certain distance from each side of the write pole. The partial side shield has a thickness less than that of the write pole and a top or bottom surface about coplanar with the pole tip's top or bottom edge, respectively. The partial side shield may include two sections on each side of the write pole wherein the bottom surface of a top section is separated by a certain distance from the top surface of a bottom section.
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