Perpendicular magnetic recording medium and magnetic...

Details Perpendicular magnetic recording medium and magnetic... Perpendicular magnetic recording medium and magnetic...

2004-09-22

2009-10-13

Tarazano, D. Lawrence (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S800000, C428S826000, C428S836000

Reexamination Certificate

active

07601445

ABSTRACT:
To make possible high density recording by making the structure of the perpendicular magnetic recording layer finer. A perpendicular magnetic recording medium10includes at least a nonmagnetic under layer2, a perpendicular magnetic layer3, and a protective layer which are stacked on a nonmagnetic substrate1, wherein the perpendicular magnetic layer includes ferromagnetic crystal grains and nonmagnetic crystal grain boundary regions, wherein the crystal grain boundary region includes at least two kinds of oxide.

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