Double shielded magnetorestive sensing element

Details Double shielded magnetorestive sensing element Double shielded magnetorestive sensing element

1975-06-02

1976-08-17

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 530, B11B 512

Patent

active

039757722

ABSTRACT:
A magnetoresistive sensing element used for sensing magnetic transitions includes relatively thick shields and substantially thinner shields between the thick shields and the MR element. The output pulse waveform resulting from the MR element sensing a magnetic transition is improved permitting a higher linear density. The thick shields can comprise the legs of an inductive write transducer with the thin shields and MR element interposed for the read function. Another read/write head embodiment can include a separate write tranducer with the thin shields and the MR element placed between one of the legs of a write transducer and a third magnetic shield formed from either a thick magnetic layer or a magnetic substrate.

REFERENCES:
patent: 3908194 (1975-09-01), Romankiw

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