公开(公告)号：US11719767B2

公开(公告)日：2023-08-08

申请号：US17457299

申请日：2021-12-02

Applicant: SHOWA DENKO K.K.

Inventor： Daizo Endo ,  Hiroyuki Tomita

IPC: G01R33/60 ,  G01R33/06

CPC classification number: G01R33/063

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.

公开(公告)号：US20220128634A1

公开(公告)日：2022-04-28

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

IPC: G01R33/06 ,  H01L43/12 ,  H01L43/02

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.

公开(公告)号：US11187762B2

公开(公告)日：2021-11-30

申请号：US16621332

申请日：2018-04-06

Applicant: SHOWA DENKO K.K.

Inventor： Daizo Endo

IPC: G01R33/06 ,  G01R33/00

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.

公开(公告)号：US10079036B2

公开(公告)日：2018-09-18

申请号：US15202674

申请日：2016-07-06

Applicant: SHOWA DENKO K.K.

Inventor： Satoru Nakamura ,  Taining Hung ,  Evance Kuo ,  Daizo Endo

IPC: G11B5/65 ,  G11B5/725 ,  G11B5/72

CPC classification number: G11B5/725 ,  G11B5/72

Abstract: A magnetic recording medium 11 in which the outermost surface of a protective layer 3 on a lubricant layer 4 side contains carbon and nitrogen of 10 atomic % to 90 atomic %, the lubricant layer 4 is formed by being in contact with the outermost surface, and contains a compound A of Formula (1) and a compound B of Formula (2), a mass ratio (A/B) of the compound A with respect to the compound B is 0.2 to 0.3, the average molecular weights of the compounds A and B are 1,500 to 2,000 and 1,300 to 2,400, respectively, and the average film thickness is 0.5 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—). HOCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2OCH2CH(OH)CH2OH   (2)