公开(公告)号：US20200279674A1

公开(公告)日：2020-09-03

申请号：US16799902

申请日：2020-02-25

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Hitoshi OHKUBO ,  Atsuyuki NAKANO

IPC: H01F1/147 ,  H01F27/28 ,  H01F27/24 ,  B32B15/01 ,  C22C38/12 ,  C22C38/00

Abstract: A coil component having high inductance while suppressing core loss is obtained. The coil component includes a coil and a magnetic core. The magnetic core has a laminated body in which soft magnetic layers are laminated. The volume occupation of a magnetic material in the laminated body is 50% or more and 99.5% or less. A structure consisting of Fe-based nanocrystals is observed in the soft magnetic layers.

公开(公告)号：US20190279799A1

公开(公告)日：2019-09-12

申请号：US16296378

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Masakazu HOSONO ,  Kenji HORINO ,  Hiroyuki MATSUMOTO ,  Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Hajime AMANO ,  Isao NAKAHATA

IPC: H01F1/24 ,  H01F1/153 ,  H01F27/255

Abstract: A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe, wherein X represents Co and/or Ni; X2 represents at least one selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from the group consisting of Nb, Hf, Zr, Zr, Ta, Mo, W, and V; 0.020≤a≤0.14, 0.020

公开(公告)号：US20190237229A1

公开(公告)日：2019-08-01

申请号：US16260715

申请日：2019-01-29

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Syota GOTO ,  Masakazu HOSONO ,  Hajime AMANO ,  Isao NAKAHATA

IPC: H01F1/147 ,  C22C38/12 ,  C22C38/00 ,  B22D23/00 ,  C21D9/52 ,  C21D6/00

CPC classification number: H01F1/14733 ,  B22D23/003 ,  B22F1/00 ,  B22F3/00 ,  C21D1/26 ,  C21D1/30 ,  C21D6/00 ,  C21D6/001 ,  C21D6/007 ,  C21D6/008 ,  C21D8/1255 ,  C21D9/46 ,  C21D9/52 ,  C21D2201/03 ,  C22C33/02 ,  C22C33/0214 ,  C22C33/0257 ,  C22C33/0264 ,  C22C33/0271 ,  C22C33/0278 ,  C22C33/0285 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/12 ,  C22C38/16 ,  C22C38/40 ,  C22C38/52 ,  C22C45/008 ,  C22C45/02 ,  C22C45/04 ,  C22C2200/02 ,  C22C2200/04 ,  C22C2202/02 ,  H01F1/147 ,  H01F1/14716 ,  H01F1/14766 ,  H01F1/14775 ,  H01F1/14791 ,  H01F1/15308 ,  H01F1/15333

Abstract: A soft magnetic alloy has a main component of Fe. The soft magnetic alloy contains P. A Fe-rich phase and a Fe-poor phase are contained. An average concentration of P in the Fe-poor phase is 1.5 times or larger than an average concentration of P in the soft magnetic alloy by number of atoms.

公开(公告)号：US20190221342A1

公开(公告)日：2019-07-18

申请号：US16244633

申请日：2019-01-10

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Akihiro HARADA ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Kensuke ARA ,  Hajime AMANO ,  Masakazu HOSONO

IPC: H01F1/153 ,  H01F1/147

CPC classification number: H01F1/15308 ,  C22C38/42 ,  C22C45/02 ,  H01F1/147 ,  H01F1/153 ,  H01F1/15333 ,  H01F41/02 ,  H01F41/0226 ,  H01F41/0246

Abstract: A soft magnetic alloy includes a main component of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020≤a≤0.14 is satisfied. 0.020

公开(公告)号：US20180247744A1

公开(公告)日：2018-08-30

申请号：US15904986

申请日：2018-02-26

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Yu YONEZAWA ,  Syota GOTO ,  Seigo TOKORO

IPC: H01F1/153 ,  C22C45/02

CPC classification number: H01F1/1535 ,  C22C33/003 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/20 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/15308 ,  H01F41/0226 ,  H01F41/0246

Abstract: Provided is a soft magnetic alloy including Fe as a main component, in which a slope of an approximate straight line, plotted between cumulative frequencies of 20 to 80% on Fe content in each grid of 80000 grids or more, each of which has 1 nm×1 nm×1 nm, is −0.1 to −0.4, provided that Fe content (atom %) of each grid is Y axis, and the cumulative frequencies (%) obtained in descending order of Fe content in each grid is X axis, and an amorphization ratio X is 85% or more.

公开(公告)号：US20240177902A1

公开(公告)日：2024-05-30

申请号：US18358191

申请日：2023-07-25

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Kensuke ARA

IPC: H01F1/20 ,  B22F1/052 ,  B22F1/08 ,  B22F1/103 ,  B22F1/142 ,  B22F1/16 ,  B22F3/02 ,  B22F3/24 ,  B22F9/08

CPC classification number: H01F1/20 ,  B22F1/052 ,  B22F1/08 ,  B22F1/103 ,  B22F1/142 ,  B22F1/16 ,  B22F3/02 ,  B22F3/24 ,  B22F9/082 ,  B22F2003/248 ,  B22F2009/0824 ,  B22F2301/35 ,  B22F2304/10 ,  B22F2998/10

Abstract: Provided is a magnetic core containing metal magnetic particles. A total area ratio occupied by the metal magnetic particles on a cross-section of the magnetic core is 75% or more. The metal magnetic particles include first large particles having an amorphous structure and having a Heywood diameter of 3 μm or more on the cross-section of the magnetic core, and second large particles having a nanocrystal structure and having a Heywood diameter of 3 μm or more on the cross-section of the magnetic core. An insulation coating of the first large particles is thicker than an insulation coating of the second large particles.

公开(公告)号：US20240079165A1

公开(公告)日：2024-03-07

申请号：US18457839

申请日：2023-08-29

Applicant: TDK CORPORATION

Inventor： Yuta NAKAGAWA ,  Kazuhiro YOSHIDOME ,  Isao NAKAHATA

IPC: H01F1/12 ,  H01F3/08

CPC classification number: H01F1/12 ,  H01F3/08

Abstract: A soft magnetic powder including a first particle group including particles having a particle size of D50 or more and a second particle group including particles having a particle size of less than D50. An average value of circularities of the particles belonging to the first particle group is defined as a first average circularity C1, and an average value of circularities of the particles belonging to the second particle group is defined as a second average circularity C2, and C1

公开(公告)号：US20240071660A1

公开(公告)日：2024-02-29

申请号：US18458639

申请日：2023-08-30

Applicant: TDK CORPORATION

Inventor： Akito HASEGAWA ,  Yoshiki KAJIURA ,  Masakazu HOSONO ,  Kazuhiro YOSHIDOME

IPC: H01F1/147 ,  H01F3/08

CPC classification number: H01F1/14758 ,  H01F3/08

Abstract: A soft magnetic alloy powder comprises a component having a compositional formula ((Fe(1−(α+β))CoαNiβ)(1−γ)X1γ)(1−(a+b+c+d+e))BaPbSicCdCre in atomic ratio. X1 comprises at least one selected from specific elements. Values of a, b, c, d, e, α, β, and γ of the compositional formula satisfy specific ranges. The soft magnetic alloy powder comprises soft magnetic alloy particles including soft magnetic alloy particles having a particle size of (0.95×D90) or more and (1.05×D90) or less. An average Wadell's circularity of the soft magnetic alloy particles having the particle size of (0.95×D90) or more and (1.05×D90) or less is 0.75 or more. A variance of Wadell's circularity of the soft magnetic alloy particles having the particle size of (0.95×D90) or more and (1.05×D90) or less is 0.035 or less.

公开(公告)号：US20240038433A1

公开(公告)日：2024-02-01

申请号：US18358433

申请日：2023-07-25

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Kensuke ARA

IPC: H01F27/255 ,  H01F1/24

CPC classification number: H01F27/255 ,  H01F1/24 ,  H01F41/0246

Abstract: Provided is a magnetic core in which metal magnetic particles occupy an area of 75% to 90% on a cross-section. The metal magnetic particles include first large particles having a nanocrystal structure and having a Heywood diameter of 3 μm or more on the cross-section of the magnetic core, and second large particles having an amorphous structure and having a Heywood diameter of 3 μm or more, and an insulation coating of the first large particles is thicker than an insulation coating of the second large particles.

公开(公告)号：US20230386720A1

公开(公告)日：2023-11-30

申请号：US18324609

申请日：2023-05-26

Applicant: TDK CORPORATION

Inventor： Hajime AMANO ,  Kensuke ARA ,  Kazuhiro YOSHIDOME ,  Akito HASEGAWA

IPC: H01F10/00 ,  H01F10/13

CPC classification number: H01F10/007 ,  H01F10/131 ,  H01F10/132

Abstract: An inductor includes a magnetic core portion and a coil portion. The magnetic core portion is a multilayer film in which a nanogranular magnetic film and a soft magnetic alloy film are alternately stacked. The nanogranular magnetic film has a structure in which nano-domains of a first phase are dispersed in a second phase. The first phase contains one or more selected from Fe and Co, and the second phase contains one or more selected from O, N, and F. The volume ratio of the first phase to the total volume of the first phase and the second phase is 60% or less. The soft magnetic alloy film contains one or more selected from Fe and Co. The total amount of Fe, Co, and Ni in the soft magnetic alloy film is 70 at % or more.