Vertical contact - canted magnet magnetoresistive sensor

Details Vertical contact - canted magnet magnetoresistive sensor Vertical contact - canted magnet magnetoresistive sensor

1994-02-25

1995-01-10

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 5127

Patent

active

053812913

ABSTRACT:
A magnetoresistive sensor has an air bearing surface, first and second vertical contacts having contact edges generally perpendicular to the air bearing surface, a generally rectangular magnetoresistive region having a first edge that comprises part of the air bearing surface and a plurality of additional edges which do not comprise part of the air bearing surface, and a permanent magnet layer having a magnetization vector oriented at 45.degree. with respect to the air bearing surface, wherein the plurality of additional edges are generally within the permanent magnet layer. The magnetoresistive sensor provides a relatively square read sensitivity window because the sense current is maintained parallel to the air bearing surface throughout the magnetoresistive region. In addition, the sensor is lapping intolerant because the relative positions of the first and second vertical contacts and the magnetoresistive region do not change as the air bearing surface is lapped.

REFERENCES:
patent: 3840898 (1974-10-01), Bajorek
patent: 4956736 (1990-09-01), Smith
patent: 5079035 (1992-01-01), Krounbi et al.

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