Magnetic recording medium
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 15, 2004
Grant Date -
N/A
app pub date -
Nov 26, 1999
filing date -
Mar 28, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic recording medium having a high normalized coercive force of a ferromagnetic metal layer and excellent S/N ration and adaptable to high density recording. The magnetic recording medium comprises a substrate body and a Co-based ferromagnetic metal layer formed thereon via a metallic underlying layer. The oxygen concentrations in the metallic underlying layer and in the ferromagnetic metal layer are not larger that 100 wt ppm. Magnetic in version is used for the recording. The value of 4.PI.Ms/H.sub.k.sup.grain is the saturation magnetization of the ferromagnetic metal layer and H.sub.k.sup.grain is the anisotropic magnetic field of the individual crystalline particles constituting the ferromagnetic metal layer is 1 or less.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully