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    SOFT MAGNETIC ALLOY AND MAGNETIC COMPONENT
    32.
    发明申请
    SOFT MAGNETIC ALLOY AND MAGNETIC COMPONENT 有权

    公开(公告)号：US20220319749A1

    公开(公告)日：2022-10-06

    申请号：US17672258

    申请日：2022-02-15

    Applicant: TDK CORPORATION

    Inventor： Hironobu KUMAOKA ,  Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Satoko MORI

    IPC: H01F1/153 ,  C22C38/30 ,  C22C38/02 ,  C22C38/00

    Abstract: A soft magnetic alloy comprising an internal area having a soft magnetic type alloy composition including Fe and Co, a Co concentrated area existing closer to a surface side than the internal area and having a higher Co concentration than in the internal area, a SB concentrated area existing closer to the surface side than the Co concentrated area and having a higher concentration of at least one element selected from Si and B than in the internal area, and a Fe concentrated area including Fe existing closer to the surface side than the SB concentrated area; wherein a crystalized area ratio of the SB concentrated area represented by SSBcry/SSB and a crystalized area ratio of the Fe concentrated area represented by SFecry/SFe, satisfy a relation of (SSBcry/SSB)

    SOFT MAGNETIC ALLOY AND MAGNETIC COMPONENT
    33.
    发明申请
    SOFT MAGNETIC ALLOY AND MAGNETIC COMPONENT 有权

    公开(公告)号：US20220235446A1

    公开(公告)日：2022-07-28

    申请号：US17614397

    申请日：2020-03-26

    Applicant: TDK CORPORATION

    Inventor： Hajime AMANO ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

    IPC: C22C45/02 ,  H01F1/153

    Abstract: A soft magnetic alloy having high saturation magnetic flux density Bs and low coercivity Hc, and a composition having formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c))MaCbX3c; X1 represents one selected from the group of Co and Ni; X2 represents one selected from the group of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, S, and rare earth elements; M represents one selected from the group of Ta, V, Zr, Hf, Ti, Nb, Mo, and W; X3 represents one selected from the group of P, B, Si, and Ge; and 0≤a≤0.140, 0.005≤b≤0.200, 0

    MAGNETIC CORE, MAGNETIC COMPONENT AND ELECTRONIC DEVICE
    35.
    发明申请
    MAGNETIC CORE, MAGNETIC COMPONENT AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20210304932A1

    公开(公告)日：2021-09-30

    申请号：US17209440

    申请日：2021-03-23

    Applicant: TDK CORPORATION

    Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

    IPC: H01F1/153 ,  C22C45/02

    Abstract: To obtain a magnetic core having an improved withstand voltage property while maintaining a high relative magnetic permeability, and the like. The magnetic core contains large particles observed as soft magnetic particles having a Heywood diameter of 5 μm or more and 25 μm or less and small particles observed as soft magnetic particles having a Heywood diameter of 0.5 μm or more and less than 5 μm in a cross section. C1

    SOFT MAGNETIC ALLOY RIBBON AND MAGNETIC COMPONENT
    37.
    发明申请
    SOFT MAGNETIC ALLOY RIBBON AND MAGNETIC COMPONENT 有权

    公开(公告)号：US20210156011A1

    公开(公告)日：2021-05-27

    申请号：US16952358

    申请日：2020-11-19

    Applicant: TDK CORPORATION

    Inventor： Takuya TSUKAHARA ,  Isao NAKAHATA ,  Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO

    IPC: C22C38/12 ,  H01F1/153 ,  C22C38/02 ,  C22C38/00

    Abstract: A soft magnetic alloy ribbon having high corrosion resistance and good magnetic properties is obtained. The soft magnetic alloy ribbon contains Fe and M. M is at least one selected from the group consisting of Nb, Ta, W, Zr, Hf, Mo, Cr, and Ti, and a part of M is included in oxides. A maximum point of a concentration of at least one of M included in the oxides is present in a region within 20 nm from the surface, when a concentration distribution of an element contained in the soft magnetic alloy ribbon is measured from a surface toward an interior of the soft magnetic alloy ribbon in a thickness direction.

    MAGNETIC CORE AND COIL COMPONENT
    40.
    发明申请
    MAGNETIC CORE AND COIL COMPONENT 审中-公开

    公开(公告)号：US20200303105A1

    公开(公告)日：2020-09-24

    申请号：US16823394

    申请日：2020-03-19

    Applicant: TDK CORPORATION

    Inventor： Nobuhiro OKUDA ,  Hiroyuki MATSUMOTO ,  Kazuhiro YOSHIDOME

    IPC: H01F1/20 ,  H01F3/08

    Abstract: The present invention relates to a magnetic core containing soft magnetic powder and a coil component using the magnetic core. The soft magnetic powder has particles each having at least one pore therein, and the number of pores present in a region of 2.5 mm square in a cross section of the magnetic core is 60×(η/80) or more and 10000×(η/80) or less, in which the volume packing density of the soft magnetic powder in the magnetic core is η%.

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