Perpendicular magnetic recording head with bottom shield layer
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United States of America Patent
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Aug 14, 2012
Grant Date -
Oct 30, 2008
app pub date -
Apr 23, 2008
filing date -
Apr 25, 2007
priority date (Note) -
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Abstract
In a perpendicular magnetic recording head in which a magnetic pole part of a main magnetic pole layer exposed at a medium-opposing surface exhibits a trapezoidal form narrower at a leading edge than at a trailing edge on the return yoke layer side, a bottom shield layer made of a soft magnetic material is provided below the leading edge of the magnetic pole part of the main magnetic pole layer in the track width direction while interposing a nonmagnetic material layer therebetween. The gap between the bottom shield layer and the leading edge of the magnetic pole part is set to less than 60 nm.
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