Perpendicular magnetic recording medium and a magnetic reproducing apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 15, 2003
Grant Date -
Nov 28, 2002
app pub date -
Jul 31, 2001
filing date -
Mar 12, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a magnetic recording medium having a laminate structure comprising at least a substrate, a Co alloy bias layer, a soft magnetic layer, and a magnetic recording layer. The direction of residual magnetization of the Co alloy bias layer faces one direction of its radial direction. Also, the perpendicular magnetic recording medium satisfies the relationship given below: Ms.sub.soft.times.(t.sub.soft -40 nm)>Ms.sub.soft.times.40 nm+Ms.sub.bias.times.t.sub.bias where, t.sub.bias denotes the thickness of the cobalt alloy bias layer, Ms.sub.bias denotes the saturation magnetization of the cobalt alloy bias layer, t.sub.soft denotes the thickness of the soft magnetic layer, which falls within a range of between 40 nm and 200 nm, and Ms.sub.soft denotes the saturation magnetization of the soft magnetic layer.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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