MAGNETIC SENSOR

WIPO Patent Application WO/2022/190853

A1

[Problem] To suppress reductions in the magnetic bias applied to a magnetoresistive element in a magnetic sensor provided with a magnetoresistive strip and a ferromagnetic film. [Solution] A magnetic sensor 1 provided with a magnetoresistive strip S that extends in a y-direction, and ferromagnetic films M1, M2 aligned in an x-direction, with a magnetic gap G that extends in the y-direction therebetween. The magnetoresistive strip S is disposed in a position that overlaps with the magnetic gap G when viewed from a z-direction. In the x-direction width of the magnetic gap G, the portion thereof that overlaps with a hard magnetic body H is wider than the portion thereof that overlaps with the magnetoresistive element R. As such, the width of the magnetic gap G in the portion that overlaps with the hard magnetic body H is enlarged, making it difficult for a magnetic field generated by the hard magnetic body H to be attracted to the ferromagnetic films M1, M2. As a result, reductions in the magnetic bias applied to the magnetoresistive element R are suppressed, making it possible to effectively reduce irregular noise superimposed on a detection signal.

KUROKI KOJI (JP)
HARATANI SUSUMU (JP)

PCT/JP2022/007192

September 15, 2022

February 22, 2022

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TDK CORP (JP)

H01L43/02; G01R33/09; H01L43/08

WO2009084433A1	2009-07-09
WO2019139110A1	2019-07-18
WO2010010872A1	2010-01-28
WO2011089978A1	2011-07-28

JP2019144116A	2019-08-29
JP2017191014A	2017-10-19
JP2012122792A	2012-06-28
US5737156A	1998-04-07
JP2020106309A	2020-07-09
JPS6391818A	1988-04-22
JPH05314430A	1993-11-26
JP2019148475A	2019-09-05

WASHIZU Mitsuhiro et al. (JP)

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