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:
May. 14, 2019
Filed:
Mar. 17, 2014
Wuxi Ler Technology Co., Jiangsu, CN;
Jianmin Bai, Jiangsu, CN;
Abstract
A magnetic head for detecting a magnetic field on the surface of a magnetic pattern based on a magneto-resistance technology comprises a support () and a PCB (Printed Circuit Board) () arranged on the support (), and further comprises horizontal excitation structures () used for generating a magnetic field parallel to the surface of the magnetic head; and a magnetic field detection component () based on magneto-resistance (MR) elements (R-R), the magnetic field detection component is used for detecting the distribution of vertical components of a leakage magnetic field on the surface of a magnetic pattern. The magnetic head can effectively detect magnetic patterns made of soft magnetic materials or hard magnetic materials. The soft magnetic material is magnetized in an in-plane manner by means of the horizontal excitation structures (), so as to generate a specific leakage magnetic field on the surface of a magnetic pattern. A Wheatstone bridge structure connection based on the MR elements (R-R) is adopted to effectively detect the vertical components of such specific leakage magnetic field, thus the features of the magnetic patterns made of the soft magnetic materials or the hard magnetic materials can be effectively detected.