Thin film magnetic head and magnetic recording and reproducing a

Details Thin film magnetic head and magnetic recording and reproducing a Thin film magnetic head and magnetic recording and reproducing a

1998-09-24

1999-11-23

Ometz, David L.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360119, 360122, G11B 5035, G11B 5187, G11B 531

Patent

active

059911107

ABSTRACT:
In the thin film magnetic transducer element, the front end portions of the upper pole piece and the lower pole piece are partially removed in such a manner that they align non parallel to the gap film on the opposite sides of the gap film. The condition .DELTA.P1>.DELTA.P2 is satisfied when the difference between the maximum pole length P1max and the minimum pole length P1min of the lower pole piece is .DELTA.P1 and the difference between the maximum pole length P2max and the minimum pole length P2min of the upper pole piece is .DELTA.P2. The sub pulse is reduced and so the partial response method can be employed.

REFERENCES:
patent: 5079831 (1992-01-01), Reid
patent: 5157569 (1992-10-01), Kumasaka et al.
patent: 5305166 (1994-04-01), Inoue et al.
patent: 5331494 (1994-07-01), Fukuda et al.
patent: 5406434 (1995-04-01), Amin et al.
patent: 5452166 (1995-09-01), Aylwin et al.

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