Magnetic head for perpendicular magnetic recording having a main pole and two shields
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United States of America Patent
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Jul 10, 2012
Grant Date -
Jul 5, 2012
app pub date -
Dec 30, 2010
filing date -
Dec 30, 2010
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 first shield disposed backward of the main pole along a direction of travel of a recording medium; a first return path section connecting the first shield to the main pole; a second shield disposed forward of the main pole along the direction of travel of the recording medium; and a second return path section connecting the second shield to the main pole. An interface between the first return path section and the main pole has an end closest to a medium facing surface, and an interface between the second return path section and the main pole has an end closest to the medium facing surface, the latter being closer to the medium facing surface than the former. The second return path section includes a yoke layer located away from the medium facing surface and in contact with the main pole. The coil includes at least one coil element that passes between the second shield and the yoke layer.
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