Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2007-10-01
2008-12-30
Whittington, Kenneth J (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S209000
Reexamination Certificate
active
07471082
ABSTRACT:
A system for use when measuring a magnetostriction value of a magnetoresistive element according to one embodiment includes a mechanism for applying a first magnetic field about parallel to a substrate having one or more magnetoresistive elements, and for applying a second magnetic field about perpendicular to the substrate and about parallel to magnetoresistive layers of the elements; a mechanism for applying a mechanical stress to the substrate during application of the magnetic fields; and a measuring subsystem for measuring a signal from at least one of the magnetoresistive elements, wherein the second magnetic field is a magnetic alternating field, wherein the measuring subsystem is locked to a frequency of the alternating field.
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International Business Machines - Corporation
Whittington Kenneth J
Zilka-Kotab, PC
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