Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1998-07-10
2000-03-28
Ometz, David L.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360113, 360115, 360131, G11B 503, G11B 533, G11B 574
Patent
active
060439475
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.
REFERENCES:
patent: 4530016 (1985-07-01), Sawazaki
patent: 4985795 (1991-01-01), Gooch
patent: 5041922 (1991-08-01), Wood et al.
patent: 5105323 (1992-04-01), Ruigrok
patent: 5130876 (1992-07-01), Gooch
patent: 5153796 (1992-10-01), Gooch
patent: 5176965 (1993-01-01), Mallary
patent: 5431969 (1995-07-01), Mallary
patent: 5493464 (1996-02-01), Koshikawa
patent: 5830590 (1998-11-01), Gooch et al.
patent: 5870260 (1999-02-01), Davies et al.
IEEE Transactions on Magnetics, "A High Resolution Flying Magnetic Disk Recording . . . Loss", Gooch et al, vol. 27, No. 6, pp. 4549-4554, Nov. 1991.
Coughlin Thomas M.
Davies David H.
Gooch Beverley R
Almeida George B.
Ampex Corporation
Mesaros John G.
O'Shea Patrick J.
Ometz David L.
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