Magnetic head and disk drive with same
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United States of America Patent
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Jan 29, 2013
Grant Date -
Oct 6, 2011
app pub date -
Jan 4, 2011
filing date -
Mar 30, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to one embodiment, a magnetic head for perpendicular recording includes a first magnetic core includes a main pole configured to produce a recording magnetic field, and a return pole configured to reflux magnetic flux from the main pole to form a magnetic circuit in conjunction with the main pole, a first coil configured to excite magnetic flux in the magnetic circuit, side shields arranged individually on opposite sides of the main pole transversely relative to a track so as to be magnetically separated from the main pole and formed integrally with the return pole, a second magnetic core configured to form a physically closed magnetic path, a part of which comprises the return pole, and a second coil wound around the second magnetic core and configured to excite magnetic flux in the closed magnetic path.
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