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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
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.
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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
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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
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.
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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
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
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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
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.
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Patent Agency Ranking
公开(公告)号：US20230178275A1
公开(公告)日：2023-06-08
申请号：US17992378
申请日：2022-11-22
Applicant: TDK CORPORATION
Inventor： Masahito KOEDA , Satoko MORI , Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO
CPC classification number: H01F1/1475 , H01F3/08 , H01F1/15383 , H01F1/15308
Abstract: A soft magnetic metal powder including a soft magnetic metal particle. The soft magnetic metal particle includes a metal particle and an oxide part covering the metal particle. An interface between the metal particle and the oxide part has roughness. A maximum height Rz of roughness at the interface between the metal particle and the oxide part is within a range of 1.0 nm or more and 50.0 nm or less.
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公开(公告)号：US20220380875A1
公开(公告)日：2022-12-01
申请号：US17622526
申请日：2021-05-13
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Akito HASEGAWA , Hironobu KUMAOKA
Abstract: A soft magnetic alloy and the like which simultaneously satisfy a high saturation magnetic flux density Bs and a high corrosion resistance. A soft magnetic alloy includes Mn and a component expressed by a compositional formula of ((Fe(1−(α+β))CoαNiβ)1−γX1γ)(1−(a+b+c+d+e))BaPbSicCdCre (atomic ratio). X1 is one or more selected from Ti, Zr, Hf, Nb, Ta, Mo, W, Al, Ga, Ag, Zn, S, Ca, Mg, V, Sn, As, Sb, Bi, N, O, Au, Cu, rare earth elements, and platinum group elements. Further, a to e and α to γ are within predetermined ranges. Mn amount f (at %) is within a range of 0.002≤f
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公开(公告)号：US20220208423A1
公开(公告)日：2022-06-30
申请号：US17602157
申请日：2020-04-22
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Akito HASEGAWA , Hironobu KUMAOKA
Abstract: A soft magnetic alloy powder which is a soft magnetic alloy powder having a low coercivity, and with which it is possible to obtain a green compact magnetic core having a high magnetic permeability. A soft magnetic alloy powder including a composition formula (Fe(1−(α+β))X1 αX2 β) (1−(a+b+c+d+e+f)) MaBbPcSidCeSf. XI is one or more elements selected from the group consisting of Co and Ni, X2 is one or more elements selected from the group consisting or Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O and rare earth elements, and M is one or more elements selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, Ti and V. The amount of each component contained is within a specified range. The amorphous rate X (%) is at least 85%.
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公开(公告)号：US20220062986A1
公开(公告)日：2022-03-03
申请号：US17411898
申请日：2021-08-25
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO
Abstract: To provide a magnetic core having a high permeability and a high voltage resistance while having a small variation in the voltage resistance.
The magnetic core includes the magnetic powder. A total area ratio of particles of the magnetic powder in a cross section of the magnetic core is 75% or more and 90% or less. An average circularity of large size particles is 0.70 or more when the large size particles are particles extracted from the particles of the magnetic powder in the cross section of the magnetic core in the order of size from the largest size until a cumulative area ratio of the extracted particles reaches a smallest area ratio exceeding 20% of the total area ratio of the particles of the magnetic powder.-
公开(公告)号：US20210296031A1
公开(公告)日：2021-09-23
申请号：US17209725
申请日：2021-03-23
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO
Abstract: To obtain a magnetic core having an improved relative magnetic permeability and an improved withstand voltage property 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 3 μm or less in a cross section. 1.00≤A1≤1.50, 1.30≤A2≤2.50, and A1
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