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公开(公告)号：US12248037B2
公开(公告)日：2025-03-11
申请号：US17596213
申请日：2020-11-17
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo , Tatsunori Shino , Akira Sakawaki , Sho Tonegawa , Yasumasa Watanabe
IPC: G01R33/06
Abstract: A magnetic sensor includes: a non-magnetic substrate; and a sensitive element 31 having a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect, wherein the sensitive element 31 includes plural soft magnetic material layers 105a to 105d and plural non-magnetic material layers 106a to 106c configured with a non-magnetic material and laminated between the plural soft magnetic material layers 105a to 105d, and the soft magnetic material layers 105a to 105d facing each other with each of the non-magnetic material layers 106a to 106c interposed therebetween are antiferromagnetically coupled.
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公开(公告)号：US11561266B2
公开(公告)日：2023-01-24
申请号：US17465236
申请日：2021-09-02
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo , Akira Sakawaki
Abstract: Reduction of the S/N in an output from a magnetic sensor using the magnetic impedance effect is suppressed. A magnetic sensor 1 is provided with a sensitive element 31 including: plural soft magnetic material layers 105; and a nonmagnetic amorphous metal layer 106 provided between the plural soft magnetic material layers 105, wherein the soft magnetic material layers 105 facing each other with the nonmagnetic amorphous metal layer 106 interposed therebetween are antiferromagnetically coupled to sense a magnetic field by a magnetic impedance effect.
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公开(公告)号：US11287487B2
公开(公告)日：2022-03-29
申请号：US16767783
申请日：2018-10-25
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo
Abstract: A magnetic sensor 1 includes: a thin film magnet 20 which is constituted by a hard magnetic material layer 103 and has magnetic anisotropy in an in-plane direction; and a sensitive part 30 including a sensitive element 31 sensing a magnetic field by a magnetic impedance effect, the sensitive element 31 being constituted by a soft magnetic material layer 105 laminated on the hard magnetic material layer 103, having a longitudinal direction and a short direction, and having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction, in which the longitudinal direction faces in the direction of a magnetic field generated by the thin film magnet 20. The thin film magnet 20 and the sensitive element 31 are provided to constitute a magnetic circuit with a facing member provided outside to face one of magnetic poles of the thin film magnet 20.
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公开(公告)号：US10559320B2
公开(公告)日：2020-02-11
申请号：US15535982
申请日：2015-12-16
Applicant: SHOWA DENKO K.K.
Inventor： Satoru Nakamura , Taining Hung , Evance Kuo , Daizo Endo
IPC: G11B5/725 , C10M107/38 , C10M105/54 , C10M111/04
Abstract: The present invention relates to a magnetic recording medium in which a lubricant layer contains a compound A represented by general formula (1) and a compound B represented by general formula (2), satisfying (A/B)=0.2 to 3.0, and has an average thickness of 0.8 nm to 2 nm. R1—C6H4OCH2CH(OH)CH2OCH2—R2—CH2OCH2CH(OH)CH2OH . . . (1) (R1 is an alkoxy group having 1 to 4 carbon atoms. R2 is —CF2O(CF2CF2O)x(CF2O)yCF2— (x, y=0 to 15), —CF2CF2O(CF2CF2CF2O)zCF2CF2— (z=1 to 15), —CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2— (n=0 to 4). HOCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2OCH2CH(OH)CH2OH . . . (2) (m is an integer).
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公开(公告)号：US11977135B2
公开(公告)日：2024-05-07
申请号：US17312444
申请日：2019-10-21
Applicant: SHOWA DENKO K.K.
Inventor： Tatsunori Shino , Daizo Endo
IPC: G01R33/06
CPC classification number: G01R33/063
Abstract: A magnetic sensor (1) includes: a nonmagnetic substrate (10); and a sensitive element (31) including a plurality of soft magnetic layers (105) (lower soft magnetic layer (105a) and upper soft magnetic layer (105b)) laminated on or above the substrate (10) and a conductor layer (106) laminated between the plurality of soft magnetic layers (105) and having higher conductivity than the plurality of soft magnetic layers (105). The sensitive element (31) has a longitudinal direction and a transverse direction and has uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction. The sensitive element (31) is configured to sense a magnetic field by a magnetic impedance effect.
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Patent Agency Ranking
公开(公告)号：US11821963B2
公开(公告)日：2023-11-21
申请号：US17701968
申请日：2022-03-23
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo , Akira Sakawaki
IPC: G01R33/06
CPC classification number: G01R33/063
Abstract: A magnetic sensor 1 includes: a non-magnetic substrate 10; and a sensitive element 30 disposed on the substrate 10. The sensitive element 30 has a longitudinal direction and a transverse direction and has a uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction. The sensitive element 30 is configured to sense a magnetic field by a magnetic impedance effect. The sensitive element 30 includes a soft magnetic material layer 101 made of an amorphous alloy based on Co and having a saturation magnetization of greater than or equal to 300 emu/cc and less than or equal to 650 emu/cc.
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公开(公告)号：US11686786B2
公开(公告)日：2023-06-27
申请号：US17526159
申请日：2021-11-15
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo , Akira Sakawaki
IPC: G01R33/06
CPC classification number: G01R33/063
Abstract: It is aimed at improving sensitivity of a magnetic sensor using the magnetic impedance effect. A magnetic sensor includes: a non-magnetic substrate; and a sensitive element including a soft magnetic material layer composed of an amorphous alloy with an initial magnetic permeability of 5,000 or more, the soft magnetic material layer being provided on the substrate, having a longitudinal direction and a short direction, being provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect.
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公开(公告)号：US11346895B2
公开(公告)日：2022-05-31
申请号：US16645639
申请日：2018-09-12
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo
Abstract: A method of manufacturing a magnetic sensor includes: a soft magnetic material layer deposition process depositing a soft magnetic material layer (101) constituting a sensitive part (21) sensing a magnetic field on a substrate (10) by magnetron sputtering; and a sensitive part formation process forming the sensitive part (21) sensing the magnetic field in a portion of the soft magnetic material layer (101) where uniaxial magnetic anisotropy is provided by a magnetic field used for magnetron sputtering of the soft magnetic material layer (101).
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公开(公告)号：US12117507B2
公开(公告)日：2024-10-15
申请号：US17784889
申请日：2020-11-17
Applicant: SHOWA DENKO K.K.
Inventor： Daizo Endo , Tatsunori Shino , Akira Sakawaki , Sho Tonegawa , Yasumasa Watanabe
IPC: G01R33/06
CPC classification number: G01R33/063
Abstract: A magnetic sensor includes: plural sensitive elements 31 each including a soft magnetic material layer 105 having a longitudinal direction and a transverse direction and a conductor layer having higher conductivity than the soft magnetic material layer 105 and extending through the soft magnetic material layer 105 in a longitudinal direction, the sensitive element 31 having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction and being configured to sense a magnetic field by a magnetic impedance effect; and a connecting portion 32 continuous with the conductor layer of the sensitive element and configured to connect transversely adjacent sensitive elements 31 in series.
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公开(公告)号：US12032043B2
公开(公告)日：2024-07-09
申请号：US17499513
申请日：2021-10-12
Applicant: SHOWA DENKO K.K.
Inventor： Sho Tonegawa , Akira Sakawaki , Yasumasa Watanabe , Daizo Endo , Tomoyuki Noguchi , Yuta Miyamoto
CPC classification number: G01R33/063 , H10N50/01 , H10N50/80
Abstract: In a magnetic sensor using a magnetic impedance effect, sensitivity is improved as compared to the case where a width of a sensitive element in the short direction is equal from one end to the other end in the longitudinal direction. The magnetic sensor includes: a non-magnetic substrate; and a sensitive element that is provided on the substrate, composed of a soft magnetic material, having a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, having a width at a center portion in the longitudinal direction that is smaller compared to a width at each of both end portions in the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect.
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