Electricity: measuring and testing – Magnetic – Magnetic information storage element testing
Patent
1987-03-03
1989-08-01
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic information storage element testing
324235, 324252, 338 32R, 360113, G01R 3306, G01R 3312, G11B 539
Patent
active
048536334
ABSTRACT:
A magnetic head characteristic measuring device for determining the recording and reproduction efficiencies of a magnetic head, which uses an MR block consisting of plural parallel magnetoresistive elements disposed on opposite sides of a reference plane aligned with the center of the gap of the magnetic head. The MR elements detect a change in the vertical component of the magnetic field caused by a change in a leakage magnetic field generated in the gap, to gauge the recording efficiency of the head. The measuring device also includes a further MR element or other conductor capable of generating a test magnetic field when supplied with a current. When this test magnetic field is being generated, a measurement of the response of the magnetic head is taken in order to gauge the reproduction efficiency of the same.
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Fuji Photo Film Co. , Ltd.
Strecker Gerard R.
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