Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1996-06-28
1998-11-03
Zirker, Daniel
Stock material or miscellaneous articles
Composite
Of inorganic material
428694T, 428694ST, 360 55, 360 66, 360131, 336213, 335297, 148304, 148403, G11B 566, G11B 570, G11B 502
Patent
active
058305904
ABSTRACT:
A magnetic storage system includes a magnetic storage medium comprising a keeper layer of relatively low permeability soft magnetic material deposited upon a magnetic storage layer or between multiple magnetic storage layers. The low permeability keeper layer may be disposed either above or below the magnetic storage layer. In the unsaturated state, the keeper layer acts as a shunt path for flux emanating from recorded transitions on the magnetic storage layer, producing an image field of the recorded transitions in the keeper. This shunt path prevents signal flux emanating from the recorded transitions from reaching the head. To read data from a recorded transition on the magnetic storage layer, a bias current is applied to windings of the head, creating a bias flux which saturates a portion of the keeper layer. Once saturated, this portion of the keeper can no longer shunt flux emanating from the recorded transition, which is the region represented by the head reproduce transducer.
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Coughlin Thomas M.
Davies David H.
Gooch Beverley R.
Almeida George B.
Ampex Corporation
Mesaros John G.
Zirker Daniel
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