A few comments,
1. AXC is marginable, it is a AMEX company. It then becomes a question of what house you own it in, and what their in-house rules are!
2. The WSJ online is worth the price!
3. So many posts, has the info been put up before?
Patent Number 5861220
ISSUE DATE: Jan-19-1999
Method and apparatus for providing a magnetic storage and reproducing media with a keeper layer having a longitudinal anisotropy
ASSIGNEE:
Ampex Corporation
Redwood City, CA
INVENTOR:
Coughlin; Thomas M.
Atascadero, CA
OTHER DETAILS:
Legal Rep:
Cesari And McKenna
Application Date:
Aug-06-1996
Application Number:
692618
Primary Examiner:
Zirker; Daniel
ABSTRACT:
A magnetic storage medium comprises a keeper layer of magnetic, saturable material disposed upon a magnetic storage layer. The keeper layer is disposed above the magnetic storage layer, and a non-magnetic "break" layer may be used between the keeper and the storage layer to reduce the exchange coupling between these layers. To increase the ability of the keeper layer to shunt flux from the magnetic storage layer, a longitudinal anisotropy is induced in the keeper layer. This desired magnetic orientation of the keeper which facilitates maintaining theregularity (i.e., relative uniformity) of the transitions, and reducing the magnetic interaction between transitions as the spacing between transitions is reduced to provide denser media. Specifically, the longitudinal anisotropy may be oriented either circumferentially or radially relative to the plane of rotation of the magnetic storage layer.
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