Method and apparatus for testing magnetic head with magnetoresis

Details Method and apparatus for testing magnetic head with magnetoresis Method and apparatus for testing magnetic head with magnetoresis

1998-02-17

2000-06-27

Strecker, Gerard

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

324537, G01R 3312, G11B 5455

Patent

active

060811145

ABSTRACT:
A method of testing a magnetic head with a spin-valve MR element having a pinned direction, includes a step of reproducing magnetic information recorded on a magnetic medium by the spin-valve MR element of the magnetic head to be tested to generate a reproduced signal, the information being recorded on the magnetic medium by using a rectangular wave current with a predetermined pattern, and a step of judging whether the pinned direction of the spin-valve MR element is correct in accordance with a relationship between wave shape of the reproduced signal and the predetermined pattern.

REFERENCES:
patent: 5150050 (1992-09-01), Genheimer et al.
patent: 5206590 (1993-04-01), Dieny et al.
patent: 5212445 (1993-05-01), Meyer
patent: 5422571 (1995-06-01), Gurney et al.
patent: 5479098 (1995-12-01), Yokoyama et al.
patent: 5708358 (1998-01-01), Ravipati
patent: 5760982 (1998-06-01), Stein

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