Magnetic head for perpendicular magnetic recording
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United States of America Patent
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May 10, 2011
Grant Date -
Apr 17, 2008
app pub date -
Oct 13, 2006
filing date -
Oct 13, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic layer for writing incorporates: a pole layer having an end face located in a medium facing surface; and an upper yoke layer. A first magnetic layer for flux concentration is connected to the pole layer at a location away from the medium facing surface, and allows a magnetic flux corresponding to a magnetic field generated by a first coil to pass. A second magnetic layer for flux concentration is connected to the upper yoke layer at a location away from the medium facing surface, and allows a magnetic flux corresponding to a magnetic field generated by a second coil to pass. When seen in the direction orthogonal to the interface between the second magnetic layer and the upper yoke layer, this interface is disposed at a location that does not coincide with the interface between the first magnetic layer and the pole layer.
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