Magnetic head for perpendicular magnetic recording having a main pole and a shield and specifically structured and located coil elements and magnetic coupling layers
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United States of America Patent
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Jan 1, 2013
Grant Date -
Dec 13, 2012
app pub date -
Jun 9, 2011
filing date -
Jun 9, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A magnetic head includes a coil, a main pole, a gap part, a write shield, and a return path section. The return path section includes a yoke part with a first coupling layer connected to the write shield and a second coupling layer magnetically coupling the first coupling layer to the yoke part. The second coupling layer has an end face facing toward a medium facing surface and located away from the medium facing surface. The coil includes i) a first coil element disposed with the first coupling layer interposed between the medium facing surface and the first coil element and ii) a plurality of second coil elements aligned perpendicularly to the medium facing surface and disposed with the second coupling layer interposed between the medium facing surface and the second coil elements. The first coil element being interposed between the main pole and the second coil elements.
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