Magnetic recording medium and method for manufacturing...

Details Magnetic recording medium and method for manufacturing... Magnetic recording medium and method for manufacturing...

2007-09-27

2010-11-16

Bernatz, Kevin M (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S830000

Reexamination Certificate

active

07833639

ABSTRACT:
A magnetic recording medium for perpendicular magnetic recording includes a substrate, a granular layer having magnetic crystal grains exhibiting perpendicular magnetic anisotropy and nonmagnetic substances for magnetically separating the magnetic crystal grains from each other at grain boundaries of the magnetic crystal grains, and a continuous film layer having magnetic grains to be exchange-coupled to the magnetic crystal grains, the grain boundary width of the magnetic grains being smaller than that of the magnetic crystal grains, wherein separation regions for magnetically separating tracks from each other are disposed in regions between the tracks of the magnetic recording medium in at least the continuous film layer.

REFERENCES:
patent: 6468670 (2002-10-01), Ikeda et al.
patent: 6777112 (2004-08-01), Girt et al.
patent: 7201977 (2007-04-01), Li et al.
patent: 7384699 (2008-06-01), Nolan et al.
patent: 2005/0191526 (2005-09-01), Fujita et al.
patent: 2005/0233178 (2005-10-01), Sugimoto et al.
Dieter Suess, et al., Optimization of Exchange Spring Perpendicular Recording Media, IEEE Transactions on Magnetics, vol. 41, No. 10, Oct. 2005.

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