公开(公告)号：US20250111975A1

公开(公告)日：2025-04-03

申请号：US18901045

申请日：2024-09-30

Applicant: TDK Corporation

Inventor： Hajime Amano ,  Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F10/13

Abstract: A nanogranular magnetic film includes first phases comprised of nano-domains dispersed in a second phase. The first phases include Fe and Co. The second phase includes a second phase compound including at least one selected from the group consisting of O, N, and F. A measurement range is determined in the nanogranular magnetic film. The measurement range is divided with grids including at least 80,000 grids each measuring 1 nm×1 nm×1 nm. Fe/(Fe+Co) and a concentration of the second phase compound of each of the grids are measured in atomic ratio. Provided that the grids are classified into MX-rich grids and MX-poor grids, a CV of Fe/(Fe+Co) of the MX-rich grids is larger than a CV of Fe/(Fe+Co) of the MX-poor grids.

公开(公告)号：US11763969B2

公开(公告)日：2023-09-19

申请号：US16296626

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Satoko Mori ,  Takuma Nakano ,  Seigo Tokoro ,  Shota Otsuka ,  Toru Ujiie ,  Kentaro Mori

IPC: H01F1/26 ,  H01F1/38 ,  H01F1/33 ,  H01F1/24 ,  H01F3/08 ,  B22F1/16 ,  H01F27/255 ,  H01F41/02 ,  H01F1/153

CPC classification number: H01F1/26 ,  B22F1/16 ,  H01F1/24 ,  H01F1/33 ,  H01F1/38 ,  H01F3/08 ,  B22F2301/35 ,  B22F2304/10 ,  H01F1/15308 ,  H01F1/15333 ,  H01F27/255 ,  H01F41/0246

Abstract: A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.

公开(公告)号：US11508502B2

公开(公告)日：2022-11-22

申请号：US16766161

申请日：2018-08-21

Applicant: TDK CORPORATION

Inventor： Akihiro Harada ,  Akito Hasegawa ,  Kazuhiro Yoshidome ,  Kenji Horino ,  Hiroyuki Matsumoto

IPC: H01F1/153 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  C22C38/26 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/00 ,  C22C45/02 ,  C21D6/00 ,  H01F1/147 ,  C22C38/02 ,  H01F1/12 ,  B22F1/00 ,  B22F3/00 ,  H01F1/14 ,  C22C45/00

Abstract: A soft magnetic alloy or the like combining high saturated magnetic flux density, low coercive force and high magnetic permeability μ′ having the composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))BaSibCcCudMe. X1 is one more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.140

公开(公告)号：US11145448B2

公开(公告)日：2021-10-12

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 ,  H01F27/255 ,  B22F1/02 ,  B22F1/00 ,  C22C45/00 ,  H01F1/153 ,  H01F3/08

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 X1 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, Ta, Mo, W, and V; 0.020≤a≤0.14, 0.020

公开(公告)号：US20200279678A1

公开(公告)日：2020-09-03

申请号：US16800311

申请日：2020-02-25

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Hitoshi Ohkubo ,  Atsuyuki Nakano

IPC: H01F1/147 ,  H01F27/255 ,  H01F27/28

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 thickness of each of the soft magnetic layers is 10 μm or more and 30 μm or less. A structure made of Fe-based nano-crystals is observed in the soft magnetic layers.

公开(公告)号：US10541072B2

公开(公告)日：2020-01-21

申请号：US15718757

申请日：2017-09-28

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Yu Yonezawa ,  Syota Goto ,  Hideaki Yokota ,  Akito Hasegawa ,  Masahito Koeda ,  Seigo Tokoro

IPC: H01F1/147 ,  C22C38/02 ,  C22C38/12 ,  C22C38/16

Abstract: A soft magnetic alloy includes a main component of Fe. The soft magnetic alloy includes a Fe composition network phase where regions whose Fe content is larger than an average composition of the soft magnetic alloy are linked. The Fe composition network phase contains Fe content maximum points that are locally higher than their surroundings. A virtual-line total distance per 1 μm3 of the soft magnetic alloy is 10 mm to 25 mm provided that the virtual-line total distance is a sum of virtual lines linking the maximum points adjacent each other. A virtual-line average distance that is an average distance of the virtual lines is 6 nm or more and 12 nm or less.

公开(公告)号：US20250111976A1

公开(公告)日：2025-04-03

申请号：US18901060

申请日：2024-09-30

Applicant: TDK Corporation

Inventor： Hajime Amano ,  Kensuke Ara ,  Kazuhiro Yoshidome

IPC: H01F10/13

Abstract: A nanogranular magnetic film includes first phases comprised of nano-domains dispersed in a second phase. The first phases include Fe and Co. The second phase includes at least one selected from the group consisting of O, N, and F. A CV of Fe/(Fe+Co) of grids is 0.150 or more and 0.500 or less, provided that a measurement range is determined in the nanogranular magnetic film, the measurement range is divided with the grids including at least 80,000 grids each measuring 1 nm×1 nm×1 nm, and Fe/(Fe+Co) of each of the grids is measured in atomic ratio.

公开(公告)号：US12165794B2

公开(公告)日：2024-12-10

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 ,  B22D23/00 ,  B22F1/07 ,  C21D1/26 ,  C21D1/30 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C21D9/52 ,  C22C33/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16 ,  C22C45/00 ,  C22C45/02 ,  C22C45/04 ,  H01F1/153 ,  B22F9/02 ,  B22F9/04 ,  C22C38/40 ,  C22C38/52

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：US11972884B2

公开(公告)日：2024-04-30

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 ,  C22C38/42 ,  C22C45/02 ,  H01F1/147 ,  H01F41/02

CPC classification number: H01F1/15325 ,  H01F1/14741 ,  H01F1/15308 ,  H01F1/15333 ,  H01F41/0226 ,  H01F41/0246 ,  C22C38/42 ,  C22C45/02

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：US11894169B2

公开(公告)日：2024-02-06

申请号：US16413848

申请日：2019-05-16

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Satoko Mori ,  Masakazu Hosono ,  Yoshiki Kajiura

IPC: H01F1/153 ,  C22C38/00 ,  C22C38/06 ,  C22C38/16 ,  H01F1/147 ,  C22C38/10 ,  C22C38/08 ,  C22C38/04 ,  C22C38/60

CPC classification number: H01F1/15333 ,  C22C38/007 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/16 ,  C22C38/60 ,  H01F1/14741 ,  H01F1/15308

Abstract: Disclosed is a soft magnetic powder including a main component represented by composition formula: (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbPcSidCeSf. X1 represents one or more selected from the group consisting of Co and Ni; X2 represents one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and rare earth elements; and M represents one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti, and V. The following relations are satisfied: 0≤a≤0.140; 0.020