Perpendicular magnetic recording medium

Details Perpendicular magnetic recording medium Perpendicular magnetic recording medium

2007-11-09

2011-12-06

Rickman, Holly (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

08071228

ABSTRACT:
Embodiments of the present invention provide a perpendicular magnetic recording medium which does not cause medium noise to increase due to soft magnetic underlayers, is capable of easily controlling the thickness of a nonmagnetic layer disposed between soft magnetic underlayers, and capable of improving the corrosion resistance of the soft magnetic underlayers. According to one embodiment, in a perpendicular magnetic recording medium, an adhesion layer is formed on a substrate, a soft magnetic underlayer is formed on the adhesion layer, a seed layer and an intermediate layer are formed above the soft magnetic underlayer, and a perpendicular layer is formed on the intermediate layer. The soft magnetic underlayer has a first soft magnetic layer, a second first soft magnetic layer, and an antiferromagnetic coupling layer disposed between the first soft magnetic layer and the second soft magnetic layer, the first soft magnetic layer and the second soft magnetic layer are formed of an alloy comprising Fe as a main ingredient, the antiferromagnetic coupling layer is formed of an Ru—Fe alloy, and an Fe content is from 40 at % to 75 at %.

REFERENCES:
patent: 6821652 (2004-11-01), Okamoto et al.
patent: 2002/0127433 (2002-09-01), Shimizu et al.
patent: 2004/0265636 (2004-12-01), Doerner et al.
patent: 2005/0244679 (2005-11-01), Arai et al.
patent: 2006/0177702 (2006-08-01), Ajan
patent: 2006/0204791 (2006-09-01), Sakawaki et al.
patent: 2006/0228587 (2006-10-01), Kuboki
patent: 06-103554 (1994-04-01), None
patent: 07-129946 (1995-05-01), None
patent: 11-191217 (1999-07-01), None
patent: 2001-155321 (2001-06-01), None
patent: 2004-118894 (2004-04-01), None
Moon et al. “Magnetic Properties and Electronic Structures of (Ru,Fe) and (Rh,Fe) Alloys.” Journal of the Korean Physical Society. 36.1 (2000): 49-53.

Affiliated with

Also associated with

Rating

Perpendicular magnetic recording medium does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Perpendicular magnetic recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perpendicular magnetic recording medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4261023