Process for making a shielded magnetoresistive sensor

Details Process for making a shielded magnetoresistive sensor Process for making a shielded magnetoresistive sensor

1988-09-27

1990-04-17

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

29603, 324252, 338 32R, G11B 539, G01R 3302, H01L 4300, H01F 706

Patent

active

049185543

ABSTRACT:
The method for making a shielded magnetoresistive (MR) sensor in which the first shield is made of sendust and the second shield is made of permalloy. The method comprises the stages of depositing a layer of sendust to form a first shield; heat treating the sendust layer at a temperature greater than 400.degree. C.; depositing a first electrically insulating layer; depositing, in the presence of a magnetic field, a MR layer; depositing a second layer of electrically insulating material; and, depositing a layer of permalloy to form the second shield.

REFERENCES:
patent: 4639806 (1987-01-01), Kira
patent: 4783711 (1988-11-01), Kitada et al.
patent: 4809109 (1989-02-01), Howard et al.

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