Side shield reader with a shield exciting coil
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United States of America Patent
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Oct 20, 2015
Grant Date -
Sep 3, 2015
app pub date -
Feb 28, 2014
filing date -
Feb 28, 2014
priority date (Note) -
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Abstract
In one embodiment, an apparatus includes at least one read head, each read head including a magnetoresistive (MR) read element, having a lower shield layer, an underlayer positioned above the lower shield layer, an antiferromagnetic (AFM) layer positioned above the underlayer, a magnetization pinned layer positioned above the AFM layer, an insulating layer positioned above the magnetization pinned layer, and a magnetization free layer positioned above the insulating layer, magnetic side shields positioned on both sides of the MR read element in a cross-track direction, and at least one shield excitation coil configured to excite magnetization of the side shields. In another embodiment, a method for forming a read sensor includes forming a MR read element, forming magnetic side shields on both sides of the MR read element in a cross-track direction, and forming at least one shield excitation coil configured to excite magnetization of the side shields.
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