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:
Nov. 11, 2025
Filed:
Jan. 28, 2022
Tdk Corporation, Tokyo, JP;
Shuichi Okawa, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A magnetic sensor includes: a sensor chip having magnetic layers magnetically coupled to each other through a magnetic gap and a magnetic sensing element disposed on a magnetic path formed by the magnetic gap; an external magnetic member magnetically coupled to one of the magnetic layer; and a measuring current coil wound around the external magnetic member and through which a current for generating a magnetic field to be measured flows. The magnetic sensing elementand the magnetic layers are thus integrated in the sensor chip, so that the magnetic gap can be designed to be very small in width, and a leakage magnetic field can be applied in large amounts to the magnetic sensing element. Thus, even when the current I flowing in the measuring current coil is weak, a magnetic field generated by the current I can be detected with high sensitivity.