Write head having independent side shield and trailing shield throat height
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United States of America Patent
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Mar 20, 2012
Grant Date -
Jul 2, 2009
app pub date -
Dec 28, 2007
filing date -
Dec 28, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A magnetic write head for perpendicular magnetic recording. The magnetic write head includes a write pole having a pole tip region and a flared region. The write pole also has a trailing, wrap-around magnetic shield that is separated from the sides of the write pole by a non-magnetic side gap layer. The write head is formed such that the side gap spacing is larger in the flared region than in the pole tip region. This varying gap spacing can be formed by depositing a non-magnetic material using a collimated sputter deposition aligned substantially perpendicular to the air bearing surface. This collimated sputtering deposits the non-magnetic material more readily on the sides of the write pole in the flared region than in the pole tip region.
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