Patents by Inventor Daizo Endo

Daizo Endo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11561266
    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.
    Type: Grant
    Filed: September 2, 2021
    Date of Patent: January 24, 2023
    Assignee: SHOWA DENKO K.K.
    Inventors: Daizo Endo, Akira Sakawaki
  • Publication number: 20230020837
    Abstract: A magnetic sensor includes: a sensitive layer made of a soft magnetic material with uniaxial magnetic anisotropy, the sensitive layer being configured to sense a magnetic field by a magnetic impedance effect; and a magnet layer made of a magnetized hard magnetic material and disposed to face the sensitive layer. The magnet layer is configured to apply a DC magnetic bias Hb in a direction intersecting a direction of the uniaxial magnetic anisotropy in the sensitive layer, the DC magnetic bias Hb having a greater value than an anisotropic magnetic field Hk of the sensitive layer.
    Type: Application
    Filed: November 17, 2020
    Publication date: January 19, 2023
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Tatsunori SHINO
  • Publication number: 20230009139
    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.
    Type: Application
    Filed: November 17, 2020
    Publication date: January 12, 2023
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Tatsunori SHINO, Akira SAKAWAKI, Sho TONEGAWA, Yasumasa WATANABE
  • Patent number: 11525871
    Abstract: A magnetic sensor 1 includes: a nonmagnetic substrate 10; a sensitive element 31 laminated on the substrate 10, the sensitive element 31 being made of a soft magnetic material, the sensitive element 31 having a longitudinal direction and a transverse direction and having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction, the sensitive element 31 being configured to sense a magnetic field by a magnetic impedance effect; and a pair of thin-film magnets 20a, 20b laminated on the substrate 10 and disposed to face each other in the longitudinal direction across the sensitive element 31, the pair of thin-film magnets 20a, 20b being configured to apply a magnetic field in the longitudinal direction of the sensitive element 31.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: December 13, 2022
    Assignee: SHOWA DENKO K. K.
    Inventors: Daizo Endo, Tatsunori Shino, Haruhisa Ohashi
  • Publication number: 20220381853
    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.
    Type: Application
    Filed: November 17, 2020
    Publication date: December 1, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Tatsunori SHINO, Akira SAKAWAKI, Sho TONEGAWA, Yasumasa WATANABE
  • Publication number: 20220308128
    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.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Akira SAKAWAKI
  • Publication number: 20220206087
    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.
    Type: Application
    Filed: November 15, 2021
    Publication date: June 30, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Akira SAKAWAKI
  • Publication number: 20220196762
    Abstract: The sensitivity of a magnetic sensor using a sensitive element sensing a magnetic field by the magnetic impedance effect is increased. The magnetic sensor includes: a sensitive element sensing a magnetic field by a magnetic impedance effect; and a focusing member provided to face the sensitive element, configured with a soft magnetic material, and focusing magnetic force lines from outside onto the sensitive element.
    Type: Application
    Filed: December 2, 2021
    Publication date: June 23, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Hiroyuki TOMITA
  • Patent number: 11346895
    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).
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: May 31, 2022
    Assignee: SHOWA DENKO K.K.
    Inventor: Daizo Endo
  • Publication number: 20220128634
    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.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 28, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Sho TONEGAWA, Akira Sakawaki, Yasumasa Watanabe, Daizo Endo, Tomoyuki Noguchi, Yuta Miyamoto
  • Publication number: 20220099760
    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.
    Type: Application
    Filed: September 2, 2021
    Publication date: March 31, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Daizo ENDO, Akira Sakawaki
  • Patent number: 11287487
    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.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: March 29, 2022
    Assignee: SHOWA DENKO K.K.
    Inventor: Daizo Endo
  • Publication number: 20220018911
    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.
    Type: Application
    Filed: October 21, 2019
    Publication date: January 20, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: Tatsunori SHINO, Daizo ENDO
  • Publication number: 20210373093
    Abstract: A magnetic sensor 1 includes: a nonmagnetic substrate 10; a sensitive element 31 laminated on the substrate 10, the sensitive element 31 being made of a soft magnetic material, the sensitive element 31 having a longitudinal direction and a transverse direction and having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction, the sensitive element 31 being configured to sense a magnetic field by a magnetic impedance effect; and a pair of thin-film magnets 20a, 20b laminated on the substrate 10 and disposed to face each other in the longitudinal direction across the sensitive element 31, the pair of thin-film magnets 20a, 20b being configured to apply a magnetic field in the longitudinal direction of the sensitive element 31.
    Type: Application
    Filed: September 5, 2019
    Publication date: December 2, 2021
    Applicant: SHOWA DENKO K. K.
    Inventors: Daizo ENDO, Tatsunori SHINO, Haruhisa OHASHI
  • Patent number: 11187762
    Abstract: A magnetic sensor 1 is provided with: a thin film magnet 20 configured with a hard magnetic material and having magnetic anisotropy in an in-plane direction; a sensitive part 30 including a sensitive element 31 configured with a soft magnetic material and disposed to face the thin film magnet 30, the sensitive element 31 having a longitudinal direction in which a magnetic flux generated by the thin film magnet 20 passes through and a short direction, having uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a change in a magnetic field; and a control layer 102 disposed on a side of the thin film magnet 20 opposite to a side of the thin film magnet 20 on which the sensitive element 31 is provided, the control layer 102 controlling the magnetic anisotropy of the thin film magnet 20 to be directed in the in-plane direction.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: November 30, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: Daizo Endo
  • Publication number: 20210141035
    Abstract: A magnetic sensor 1 is provided with: a thin film magnet 20 configured with a hard magnetic material and having magnetic anisotropy in an in-plane direction; a sensitive part 30 including a sensitive element 31 configured with a soft magnetic material and disposed to face the thin film magnet 30, the sensitive element 31 having a longitudinal direction in which a magnetic flux generated by the thin film magnet 20 passes through and a short direction, having uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a change in a magnetic field; and a control layer 102 disposed on a side of the thin film magnet 20 opposite to a side of the thin film magnet 20 on which the sensitive element 31 is provided, the control layer 102 controlling the magnetic anisotropy of the thin film magnet 20 to be directed in the in-plane direction.
    Type: Application
    Filed: April 6, 2018
    Publication date: May 13, 2021
    Applicant: SHOWA DENKO K.K.
    Inventor: Daizo ENDO
  • Publication number: 20200386830
    Abstract: A method of manufacturing a magnetic sensor (1) which method includes: forming a hard magnetic material layer (103) to be processed to a thin film magnet (20) on a disk-shaped nonmagnetic substrate (10); forming a soft magnetic material layer (105) laminated on the hard magnetic material layer (103) on the substrate (10), the soft magnetic material layer (105) being processed into a sensitive element sensing a magnetic field; and magnetizing the hard magnetic material layer (103) in the circumferential direction of the disk-shaped substrate 10. Also disclosed is a magnetic sensor assembly.
    Type: Application
    Filed: November 9, 2018
    Publication date: December 10, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: Daizo ENDO
  • Publication number: 20200341077
    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.
    Type: Application
    Filed: October 25, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: Daizo ENDO
  • Publication number: 20200264243
    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).
    Type: Application
    Filed: September 12, 2018
    Publication date: August 20, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: Daizo ENDO
  • Patent number: 10559320
    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).
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: February 11, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Satoru Nakamura, Taining Hung, Evance Kuo, Daizo Endo