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:
Jun. 26, 2007
Filed:
Apr. 03, 2003
Eckhard Quandt, Bonn, DE;
Markus Lohndorf, Bonn, DE;
Alfred Ludwig, Bonn, DE;
Manfred Ruhrig, Eckental, DE;
Joachim Wecker, Rottenbach, DE;
Eckhard Quandt, Bonn, DE;
Markus Lohndorf, Bonn, DE;
Alfred Ludwig, Bonn, DE;
Manfred Ruhrig, Eckental, DE;
Joachim Wecker, Rottenbach, DE;
Stifting Caesar, Bonn, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A sensor for measuring mechanical changes in length, in particular a compressive and/or tensile stress sensor, includes a sandwich system with two flat and superposed electrodes separated from each other by a tunnel element (tunnel barrier), in particular an oxide barrier, a current being set up between the electrodes and through the tunnel barrier, one electrode consisting of a magnetostrictive layerwhich responds to elongation, and wherein the contributions of the anisotropies caused by mechanical tension are larger than those from the intrinsic anisotropies, relative changes in system resistance ΔR/R larger than 10% at room temperature being attained during elongation.