Magnetic field detection apparatus and current detection apparatus

A magnetic field detection apparatus comprising:

• a magnetoresistive effect element,
• a coil including a first tier part and a second tier part opposed to each other in a first axis direction, with the in magnetoresistive effect element being interposed between the first tier part and the second tier part, the coil being configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect element in a second axis direction;
• a substrate;
• a first nonmagnetic insulator;
• and
• a second nonmagnetic insulator, wherein
• the first tier part includes a plurality of first conductors each extending in a third axis direction, the plurality of first conductors being arranged in the second axis direction and coupled in parallel to each other,
• the second tier part includes a second conductor extending in the third axis direction or a plurality of the second conductors each extending in the third axis direction, the plurality of second conductors being arranged in the second Axis direction and coupled in parallel to each other;
• the first tier part, the first nonmagnetic insulator, the magnetoresistive effect element, the second nonmagnetic insulator, and the second tier part are stacked in this order over the substrate, and
• in the first axis direction, a first distance between the magnetoresistive effect element and the first tier part is greater than a second distance between the magnetoresistive effect element and the second tier part.

A magnetic field detection apparatus comprising:

• a plurality of magnetoresistive effect elements;
• and
• a coil including a first tier part and a second tier part opposed to each other in a first axis direction, with the magnetoresistive effect elements being interposed between the first tier part and the second tier part, the coil being configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect elements in a second axis direction, wherein
• the first tier part includes a plurality of first conductors each extending in a third axis direction, the plurality of first conductors being arranged in the send axis direction and coupled in parallel to each other,
• the second tier part includes a second conductor extending in the third axis direction or a plurality of the second conductors each extending in the third axis direction, the plurality of second conductors being arranged in the second axis direction and coupled in parallel to each other, and
• each of the magnetoresistive effect elements includes a plurality of magnetoresistive effect films arranged in the third axis direction.

A current detection apparatus comprising:

• a magnetoresistive effect element;
• a coil including a first tier part and a second tier part opposed to each other in a first axis direction, with the magnetoresistive effect element being interposed between the first tier part and the second tier part, the coil being wound around the magnetoresistive effect element while extending along a second axis direction orthogonal to the first axis direction, and being configured to be supplied with a first current and thereby configured to generate a first induction magnetic field to be applied to the magnetoresistive effect element in the second axis direction;
• and
• a conductive line configured to be supplied with a second current and thereby configured to generate a second induction magnetic field to be applied to the magnetoresistive effect element in the second axis direction, wherein
• the first tier part including a plurality of first conductors each extending in a third axis direction that is along a winding direction of the coil, the plurality of first conductors being arranged in the second axis direction and coupled in parallel to each other,
• the second tier part, includes a plurality of second conductors each extending in the third axis direction, the plurality of second conductors being arranged in the second axis direction and coupled in parallel to each other, and
• the plurality of first conductors is larger in number than the plurality of second conductors.

A current detection apparatus comprising:

• a magnetoresistive effect element;
• a coil including a first tier part and a second tier part opposed to each other in a first axis direction, with the magnetoresistive effect element being interposed between the first tier part and the second tier part, the coil being configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect element in a second axis direction;
• a conductive line configured to be supplied with a second current and thereby configured to generate a second induction magnetic field to be applied to the magnetoresistive effect element in the second axis direction,
• a substrate;
• a first nonmagnetic insulator, and
• a second nonmagnetic insulator, wherein
• the first tier part includes a plurality of first conductors each extending in a third axis direction that is along a winding direction of the coil, the plurality of first conductors being arranged in the second axis direction and coupled in parallel to each other,
• the second tier part includes a second conductor extending in the third axis direction or a plurality of the second conductors each extending in the third axis direction, the plurality of second conductors being arranged in the second axis direction and coupled in parallel to each other,
• the first tier part, the first nonmagnetic insulator, the magnetoresistive effect element, the second nonmagnetic insulator, and the second tier part are stacked in this order over the substrate, and
• in the first axis direction, a first distance between the magnetoresistive effect element and the first tier part is greater than a second distance between the magnetoresistive effect element and the second tier part.

A current detection apparatus comprising:

• a plurality of magnetoresistive effect elements;
• and
• a coil including a first tier part and a second tier part opposed to each other in a first axis direction, with the magnetoresistive effect elements being interposed between the first tier part and the second tier part, the coil being configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect elements in a second axis direction, and
• a conductive line configured to be supplied with a second current and thereby configured to generate a second induction magnetic field to be applied to the magnetoresistive effect elements in the second axis direction, wherein
• the first tier part includes a plurality of first conductors each extending in a third axis direction that is along a winding direction of the coil, the plurality of first conductors being arranged in the second axis direction and coupled in parallel to each other,
• the second tier part includes a second conductor extending in the third axis direction or a plurality of the second conductors each extending in the third axis direction, the plurality of second conductors being arranged in the second axis direction and coupled in parallel to each other, and
• each of the magnetoresistive effect elements includes a plurality of magnetoresistive effect films arranged in the third axis direction.