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    • 3. 发明公开
    • MAGNETIC DETECTION DEVICE AND METHOD FOR PRODUCING SAME
    • EP3141920A4
    • 2018-01-03
    • EP15789848
    • 2015-03-12
    • AICHI STEEL CORP
    • YAMAMOTO MICHIHARUNAGAO TOMOHIKO
    • G01R33/02G01C17/30H01L43/00
    • G01R33/063G01C17/30G01R33/0052G01R33/02G01R33/0206H01L27/22H01L43/00H01L43/02H01L43/12
    • An object is to provide a magnetic detection device that can be reduced in size and thickness. The magnetic detection device (1) of the present invention comprises: a substrate (S); and a first magneto-impedance element (MI element) disposed at one surface side of the substrate and comprising a first magneto-sensitive wire (W1) and a first detection coil (C1). The first magneto-sensitive wire senses an external magnetic field component in a first axis direction in which the first magneto-sensitive wire extends. The first detection coil loops around the first magneto-sensitive wire. The first detection coil according to the present invention comprises a left-side coil part (C11) and a right-side coil part (C12) that coexist along the first magneto-sensitive wire, and is provided with a magnetic field direction changing body (F1) composed of a soft magnetic material of which at least a part is disposed at another surface side of the substrate or in the substrate above an intermediate position between the left-side coil part and the right-side coil part. The magnetic field direction changing body is able to change an external magnetic field component in a third axis direction intersecting the substrate to a measurement magnetic field component in the first axis direction. The external magnetic field component in the third axis direction is able to be detected on the basis of a left-side output obtained from the left-side coil part and a right-side output obtained from the right-side coil part.