The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2008
Filed:
Oct. 01, 2007
Hubert Grimm, Mommenheim, DE;
Hubert Grimm, Mommenheim, DE;
International Business Machines Corporation, Armonk, NY (US);
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.