Perpendicular magnetic recording head and magnetic disc apparatus
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United States of America Patent
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Jul 1, 2008
Grant Date -
Oct 28, 2004
app pub date -
Mar 19, 2004
filing date -
Apr 28, 2003
priority date (Note) -
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Abstract
A magnetic disc apparatus includes a double layered perpendicular recording medium including a soft magnetic underlayer and a perpendicular recording layer, which are formed on a substrate, and a perpendicular magnetic recording head including a main pole generating a recording magnetic field in a perpendicular direction, and an auxiliary pole connected to the main pole on a trailing side to the main pole and having a multilayered structure in which a nonmagnetic layer is sandwiched between magnetic layers.
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