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:
Oct. 05, 2021
Filed:
Oct. 06, 2017
Christian-albrechts-universitaet Zu Kiel, Kiel, DE;
Eckhard Quandt, Heikendorf, DE;
Anne Kittmann, Kiel, DE;
Sebastian Zabel, Kiel, DE;
Erdem Yarar, Kiel, DE;
Franz Faupel, Heikendorf, DE;
Reinhard Knoechel, Elmshorn, DE;
Michael Hoeft, Laboe, DE;
Phillip Durdaut, Kiel, DE;
Christian-lbrechts-Universitaet zu Kiel, Kiel, DE;
Abstract
A magnetic field sensor element with a piezo electric substrate having predetermined shear wave velocity V, two pairs of interdigital electrodes, arranged on the substrate on the ends of a delay section, having a period length p of at least 10 micrometers, a non-magnetic, electrically non-conductive guide layer arranged on the substrate along the delay section, and a magnetostrictive functional layer arranged on the guide layer, wherein the shear wave velocity in the guide layer is smaller than V, wherein a) the substrate is oriented to generate and propagate mechanical shear waves upon applying a temporally periodic, electrical voltage to at least one interdigital electrode pair in the range of frequency V/p and, wherein b) the thickness of the guide layer equals at least 10% and at most 30% of the period length p of the interdigital electrodes.