US 12,072,398 B2
Magnetic sensor device having magnetic field converter, magnetic field detector, and magnetic shield
Yongfu Cai, Tokyo (JP)
Assigned to TDK Corporation, Tokyo (JP)
Filed by TDK Corporation, Tokyo (JP)
Filed on Jun. 16, 2023, as Appl. No. 18/336,133.
Application 18/336,133 is a continuation of application No. 17/034,370, filed on Sep. 28, 2020, granted, now 11,747,410.
Claims priority of application No. 2019-181746 (JP), filed on Oct. 1, 2019.
Prior Publication US 2023/0324478 A1, Oct. 12, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 33/09 (2006.01); G01D 5/14 (2006.01)
CPC G01R 33/098 (2013.01) [G01D 5/145 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A magnetic sensor device comprising:
a magnetic field converter that receives an input magnetic field including a magnetic field component along a first direction and outputs an output magnetic field including a magnetic field component along a second direction, which is orthogonal to the first direction;
a magnetic field detector provided at a position where the output magnetic field can be applied; and
a magnetic shield that shields external magnetic field components along a third direction, which is orthogonal to both the first direction and the second direction;
wherein the magnetic field converter is made of a soft magnetic material;
when viewed along the first direction, the magnetic field converter has a shape such that a length in the third direction is greater than a length in the second direction;
when viewed along the first direction, the magnetic shield is provided at a position overlapping the magnetic field converter and the magnetic field detector; and
a magnetic field transmittance of the external magnetic field is 1˜30%.