Flux shunt structure for reducing return pole corner fields in a perpendicular magnetic recording head
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United States of America Patent
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Dec 29, 2009
Grant Date -
Nov 2, 2006
app pub date -
Apr 27, 2005
filing date -
Apr 27, 2005
priority date (Note) -
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Abstract
A magnetic head for use in a perpendicular recording system having a novel shield structure that provides exceptional magnetic shielding from extraneous magnetic fields such as from a write coil, shaping layer or return pole of the write head. The magnetic head includes a write pole, a return pole and a magnetic shield that is magnetically connected with the return pole near the ABS and extends toward the write pole. The shield is formed with a notch at its edge closest to the write pole. The notch assures adequate physical, magnetic, and electrical separation between the write pole and the shield, while allowing un-notched portions of the shield to provide additional magnetic shielding.
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