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公开(公告)号：US12159743B2
公开(公告)日：2024-12-03
申请号：US17209422
申请日：2021-03-23
Applicant: TDK CORPORATION
Inventor： Kyotaro Abe , Takuya Tsukahara , Isao Nakahata , Kazuhiro Yoshidome
IPC: H01F3/04 , B22D11/00 , C21D6/00 , C21D9/56 , C22C1/11 , C22C19/07 , C22C38/02 , C22C45/02 , H01F1/147 , H01F1/153 , B82Y25/00 , B82Y30/00 , B82Y35/00 , B82Y40/00
Abstract: The object of the present invention is to provide an alloy ribbon capable of having excellent adhesiveness between the alloy ribbons when a plurality of the alloy ribbons is stacked; and also, to provide a magnetic core using the alloy ribbon. The present invention is an alloy ribbon comprising metals scattered on at least one surface of the alloy ribbon, in which diameters of the scattered metals are 1 μm or more, and the scattered metals include Cu.
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公开(公告)号：US12191060B2
公开(公告)日：2025-01-07
申请号：US17893463
申请日：2022-08-23
Applicant: TDK CORPORATION
Inventor： Kyotaro Abe , Isao Nakahata , Takuya Tsukahara
Abstract: Provided a soft magnetic alloy ribbon containing Fe and B. Convex portions having an average convex portion height of 7 nm to 130 nm are present on an alloy surface.
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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
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
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公开(公告)号：US10329200B2
公开(公告)日：2019-06-25
申请号：US15765150
申请日：2016-09-30
Applicant: TDK CORPORATION
Inventor： Kumiko Yamazaki , Isao Nakahata
IPC: C04B35/00 , C04B35/58 , C04B35/462 , C23C14/06 , C23C14/24 , H01G4/33 , H01B3/00 , H01G4/12 , C04B35/622 , C04B35/626 , C04B35/634 , C04B35/64 , C23C14/28
Abstract: A dielectric thin film with high relative permittivity and high insulation can establish the amount of nitrogen in a metal oxynitride to be low. A dielectric thin film, wherein the dielectric composition is a metal oxynitride solid solution including Ma and Mb: a composition represented by the chemical formula MazMbOxNy (Ma is one element selected from Sr, Ba, Ca, La, Ce, Pr, Nd, and Na, Mb is one element selected from Ta, Nb, Ti and W, O is oxygen, and N is nitrogen); when a is the ionic valence exhibited when Ma occupies an A site in the perovskite structure and b is the ionic valence exhibited when Mb occupies a B site in the perovskite structure, a and b are 6.7≤a+b≤7.3, and x, y and z are 0.8≤z≤1.2, 2.450≤x≤3.493, and 0.005≤y≤0.700.
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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.
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Patent Agency Ranking
公开(公告)号：US11990271B2
公开(公告)日：2024-05-21
申请号：US15924847
申请日：2018-03-19
Applicant: TDK CORPORATION
Inventor： Isao Nakahata , Mitsuhiro Matsuhashi
CPC classification number: H01F3/04 , H01F1/14 , H01F3/10 , H01F27/25 , H01F38/14 , H01F41/0226 , H02J50/10 , H01F41/0213
Abstract: A soft magnetic ribbon for a magnetic core segmented into small pieces includes: an inductance priority region having a first average crack interval; and an eddy current suppression priority region having a second average crack interval, in which the first and second average crack intervals are different from each other.
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公开(公告)号：US11955261B2
公开(公告)日：2024-04-09
申请号：US17893502
申请日：2022-08-23
Applicant: TDK CORPORATION
Inventor： Kyotaro Abe , Isao Nakahata , Takuya Tsukahara
CPC classification number: H01F1/15308 , C22C45/02 , H01F1/15333 , H01F3/04
Abstract: A specific depth at which a concentration of Fe reaches 10 at % is 18 nm or more and 500 nm or less from the first surface, and from the first surface to the specific depth, the concentration of Fe is less than 10 at %, and a positive increase region is present in which the concentration of Fe increases with a substantially positive concentration gradient, in a case where the concentration of Fe is measured in a depth direction from a first surface of a ribbon.
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8.发明授权公开(公告)号：US12062475B2
公开(公告)日：2024-08-13
申请号：US17702972
申请日：2022-03-24
Applicant: TDK CORPORATION
Inventor： Takuya Tsukahara , Isao Nakahata , Kazuhiro Yoshidome
CPC classification number: H01F1/15333 , C22C38/02 , C22C38/12 , C22C38/16 , C22C45/02 , C22C2200/02 , C22C2202/02
Abstract: To provide a soft magnetic alloy or the like, from which a magnetic component having a good temperature property of core loss can be obtained. The soft magnetic alloy includes Fe. The soft magnetic alloy includes a crystallite, and an amorphous phase existing around the crystallite. A total area ratio of the crystallite in a cross section of the soft magnetic alloy is 40% or more and less than 60%. An average thickness of the amorphous phase is 3.0 nm or more and 10.0 nm or less. A standard deviation of a thickness of the amorphous phase is 10.0 nm or less.
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公开(公告)号：US11441213B2
公开(公告)日：2022-09-13
申请号：US16952358
申请日：2020-11-19
Applicant: TDK CORPORATION
Inventor： Takuya Tsukahara , Isao Nakahata , Kazuhiro Yoshidome , Hiroyuki Matsumoto
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.
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公开(公告)号：US11427896B2
公开(公告)日：2022-08-30
申请号：US16961583
申请日：2018-12-03
Applicant: TDK CORPORATION
Inventor： Akito Hasegawa , Hironobu Kumaoka , Kazuhiro Yoshidome , Hiroyuki Matsumoto , Kenji Horino , Isao Nakahata
Abstract: A soft magnetic alloy thin strip which has high saturation magnetic flux density and low coercivity, which enables a core with high space factor and high saturation magnetic flux density. A soft magnetic alloy thin strip including a main component that has a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbPcSidCeSf. In the formula, X1, X2 and M are selected from a specific element group; 0≤a≤0.140, 0.020≤b≤0.200, 0≤c≤0.150, 0≤d≤0.090, 0≤e≤0.030, 0≤f≤0.030, α≥0, β≥0, and 0≤α+β≤0.50; and at least one of a, c and d is larger than 0. The strip has a structure that is composed of an Fe-based nanocrystal; and the surface roughness of a release surface satisfies 0.85≤Rae/Rac≤1.25 (wherein Rac is the average of arithmetic mean roughnesses in the central portion, and Rae is the average in the edge portion).
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