Perpendicular magnetic recording head and perpendicular magnetic recording/reproducing head having a magnetic shield layer with a thick edge portion
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United States of America Patent
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Mar 8, 2011
Grant Date -
Jan 24, 2008
app pub date -
Jul 20, 2007
filing date -
Jul 21, 2006
priority date (Note) -
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Abstract
A perpendicular magnetic recording head includes a first magnetic layer having a main magnetic pole exposed at a medium-facing surface that faces a recording medium; a second magnetic layer that faces the first magnetic layer with a nonmagnetic layer interposed therebetween; and a coil layer for applying a recording magnetic field to the first magnetic layer. The second magnetic layer includes a relatively thick edge portion, whereby the edge-write magnetic field is reduced and the external magnetic field resistance is increased.
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