Perpendicular magnetic recording medium and magnetic storage...

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

2011-01-25

2011-01-25

Ruthkosky, Mark (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S800000, C428S810000, C428S836000

Reexamination Certificate

active

07875373

ABSTRACT:
Embodiments in accordance with the present invention help to obtain a perpendicular magnetic recording medium having a granular structure, excellent recording/reproducing properties, and excellent durability. According to one embodiment, a recording layer includes a layer which has crystal grains mainly composed of cobalt and crystal grain boundaries mainly composed of the oxide; the oxygen content of the recoding layer is changed in the film thickness direction; the oxygen content in the area in the vicinity of the interface between the recording layer and the intermediate layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer; and the oxygen content in the area in the vicinity of the interface between the recording layer and the protective layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer.

REFERENCES:
patent: 5587235 (1996-12-01), Suzuki et al.
patent: 6555248 (2003-04-01), Takahashi et al.
patent: 7147942 (2006-12-01), Uwazumi et al.
patent: 2006/0057431 (2006-03-01), Tamai et al.
patent: 2006/0088737 (2006-04-01), Hirayama et al.
patent: 2006/0204791 (2006-09-01), Sakawaki et al.
patent: 2005-141825 (2005-06-01), None
European Search Report dated Dec. 20, 2007 for European patent application EP07015725.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2730230