Method of detecting polarity reversal in a magnetoresistive...

Details Method of detecting polarity reversal in a magnetoresistive... Method of detecting polarity reversal in a magnetoresistive...

2005-11-15

2005-11-15

Ledynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

C360S031000

Reexamination Certificate

active

06965229

ABSTRACT:
A method is provided for testing a magnetoresistive sensor for polarity reversal. In one embodiment, the method includes: writing a test pattern on a magnetic disk; providing a mechanical or thermal stress to the magnetoresistive sensor for a period of time; and, comparing the polarity of the test pattern before and after the application of stress.

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A. Wallash, “New Early Failure Phenomenon in Electrostatic Discharge Damaged Giant Magnetoresistive Recording Heads”, Journal of Applied Physics, vol. 93, No. 10, May 15, 2003, pp. 7319-7321.

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