Magnetic recording medium, method manufacture therefor, and...

Details Magnetic recording medium, method manufacture therefor, and... Magnetic recording medium, method manufacture therefor, and...

2006-06-06

2006-06-06

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S836300

Reexamination Certificate

active

07056606

ABSTRACT:
A magnetic recording medium comprising: on a non-magnetic substrate, at least a soft magnetic undercoat film comprising a soft magnetic material; an orientation control film for controlling an orientation of a film directly above; a perpendicular magnetic film in which an axis of easy magnetization is oriented mainly perpendicularly with respect to the substrate; and a protection film, wherein the perpendicular magnetic film has a structure in which a large number of magnetic grains are separated by a grain boundary layer, and an average separating distance between the magnetic grains along a straight line which connects centers of gravity of mutually neighboring magnetic grains is 1 nm or greater.

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patent: 2002-025030 (2002-01-01), None
Translation JA 2002-025030.

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