Heat-assisted magnetic recording method using eddy current and head for heat-assisted magnetic recording
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United States of America Patent
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May 31, 2011
Grant Date -
Jan 31, 2008
app pub date -
Jul 20, 2007
filing date -
Jul 27, 2006
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Abstract
A heat-assisted magnetic head that can efficiently and locally heat a magnetic recording medium. The head includes a heating coil element, and a write head element for writing data signals by generating a signal magnetic field, and a read head element for reading data signals by sensing the signal magnetic field. The heating coil element comprises a main heating magnetic pole layer, an auxiliary heating magnetic pole layer, and a heating coil layer for generating a magnetic flux in the main heating magnetic pole layer and the auxiliary heating magnetic pole layer and passing through at least between the main heating magnetic pole layer and the auxiliary heating magnetic pole layer. The read head element, heating coil element, and the write head element are stacked in this order from an element-formed surface of a substrate.
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