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:
Feb. 20, 2018
Filed:
Jan. 26, 2016
Freescale Semiconductor, Inc., Austin, TX (US);
Paige M. Holm, Phoenix, AZ (US);
Lianjun Liu, Chandler, AZ (US);
NXP USA, Inc., Austin, TX (US);
Abstract
A magnetic field sensor comprises a sensor bridge having multiple sensor legs. Each sensor leg includes magnetoresistive sense elements located in a plane of the magnetic field sensor. Each sense element comprises a pinned layer and a sense layer. The pinned layer has a reference magnetization oriented parallel to the plane and the sense layer has a sense magnetization oriented out-of-plane. A permanent magnet layer may be spaced apart from the sense elements which magnetically biases the sense magnetization of the sense layer into an out-of-plane direction that is non-perpendicular to the plane of the sensor. The sense magnetization is orientable from the out-of-plane direction toward the plane of the sensor in response to an external magnetic field. The permanent magnet layer enables detection of the external magnetic field in a sensing direction that is also perpendicular to the plane of the magnetic field sensor.