Patent ID: 11946989
Assignee: TDK CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A magnetic sensor device comprising:
a magnetic sensor configured to detect a target magnetic field that is a magnetic field to be detected, the magnetic sensor including a plurality of magnetoresistive elements and an element layout area for laying out the plurality of magnetoresistive elements; and
a support that supports the magnetic sensor and has a reference plane, wherein:
when the magnetic sensor device is seen in a first reference direction, a center of gravity of the element layout area is deviated from a center of gravity of the reference plane, the first reference direction being a direction perpendicular to the reference plane;
the magnetic sensor further includes
a power supply port,
a ground port,
a signal output port,
a first resistor section connected to one of the power supply port and the ground port, and
a second resistor section connected to an other of the power supply port and the ground port;

a connection point between the first resistor section and the second resistor section is connected to the signal output port;
the plurality of magnetoresistive elements constitute the first and second resistor sections;
each of the plurality of magnetoresistive elements includes a magnetization pinned layer having magnetization whose direction is fixed, a free layer having magnetization whose direction is variable depending on the target magnetic field, and a gap layer located between the magnetization pinned layer and the free layer;
the magnetization of the magnetization pinned layer in the first resistor section includes a component in a first magnetization direction, the first magnetization direction being a direction intersecting the first reference direction;
the magnetization of the magnetization pinned layer in the second resistor section includes a component in a second magnetization direction, the second magnetization direction being a direction intersecting the first reference direction and opposite to the first magnetization direction;
the magnetization of the free layer in the first resistor section includes a component in a third magnetization direction when the target magnetic field is not applied to the magnetic sensor, the third magnetization direction being a direction intersecting the first reference direction and orthogonal to the first magnetization direction; and
the magnetization of the free layer in the second resistor section includes a component in a fourth magnetization direction when the target magnetic field is not applied to the magnetic sensor, the fourth magnetization direction being a direction intersecting the first reference direction and opposite to the third magnetization direction.