Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media
Reexamination Certificate
2011-03-08
2011-03-08
Bernatz, Kevin M (Department: 1785)
Stock material or miscellaneous articles
Magnetic recording component or stock
Thin film media
C428S836200, C360S131000
Reexamination Certificate
active
07901803
ABSTRACT:
A perpendicular magnetic recording medium includes: a substrate; at least one underlayer formed above the substrate; and a perpendicular magnetic recording layer formed above the at least one underlayer, an easy magnetization axis of the perpendicular magnetic recording layer being oriented perpendicular to the substrate, the perpendicular magnetic recording layer including magnetic crystal particles and grain boundaries surrounding the magnetic crystal particles, wherein the grain boundaries contain an oxide of silicon and at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Ca, Sr, and Ba, and the ratio of a total amount of substance of Si, Li, Na, K, Rb, Cs, Ca, Sr, and Ba in the perpendicular magnetic recording layer is no less than 1 mol % and no more than 20 mol %.
REFERENCES:
patent: 5652054 (1997-07-01), Kikitsu et al.
patent: 5736013 (1998-04-01), Ranjan et al.
patent: 6696172 (2004-02-01), Oikawa et al.
patent: 7183011 (2007-02-01), Nakamura et al.
patent: 7429427 (2008-09-01), Wu et al.
patent: 2001/0036564 (2001-11-01), Ohmori
patent: 2002/0160232 (2002-10-01), Shimizu et al.
patent: 2002/0172842 (2002-11-01), Honda et al.
patent: 2003/0170500 (2003-09-01), Shimizu et al.
patent: 2003/0215675 (2003-11-01), Inaba et al.
patent: 2003/0219630 (2003-11-01), Moriwaki et al.
patent: 5-143953 (1993-06-01), None
patent: 9-204651 (1997-08-01), None
patent: 2000-182233 (2000-06-01), None
patent: 2001-14662 (2001-01-01), None
patent: 2001-43526 (2001-02-01), None
patent: 2001-291230 (2001-10-01), None
patent: 2001-351217 (2001-12-01), None
patent: 2002-25030 (2002-01-01), None
patent: 2002-83411 (2002-03-01), None
patent: 2002-208129 (2002-07-01), None
patent: 2002-260209 (2002-09-01), None
patent: 2002-329305 (2002-11-01), None
patent: 2002-334424 (2002-11-01), None
patent: 2002-334424 (2002-11-01), None
patent: 2003-36525 (2003-02-01), None
patent: 2003-123245 (2003-04-01), None
patent: 2003-217107 (2003-07-01), None
Derwent Abstract Translation of JP-2002-334424 A (Derwent-Acc-No. 2003-346099).
Iwasaki Takeshi
Maeda Tomoyuki
Nakamura Futoshi
Oikawa Soichi
Sakai Hiroshi
Bernatz Kevin M
Kabushiki Kaisha Toshiba
Showa Denko K.K.
Sughrue & Mion, PLLC
LandOfFree
Perpendicular magnetic recording medium, manufacturing... 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, manufacturing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perpendicular magnetic recording medium, manufacturing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2741585