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公开(公告)号：US20230339018A1
公开(公告)日：2023-10-26
申请号：US18302517
申请日：2023-04-18
Applicant: TDK CORPORATION
Inventor： Kyohei TAKAHASHI , Hiroshi ITO , Isao KANADA , Akito HASEGAWA
Abstract: A metal magnetic powder includes Co as a main component, and the metal magnetic powder includes metal nanoparticles having a mean particle size (D50) of 1 nm or more and 100 nm or less. Each of the metal nanoparticles includes hcp-Co as a main phase, and the metal magnetic powder includes at least one amphoteric metal.
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公开(公告)号：US20230268107A1
公开(公告)日：2023-08-24
申请号：US18169297
申请日：2023-02-15
Applicant: TDK CORPORATION
Inventor： Seigo TOKORO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Nobuhiro OKUDA
Abstract: A magnetic core, containing metal magnetic powder and resin, in which a content of the metal magnetic powder satisfies 60%≤(A1/A2)≤90%. The metal magnetic powder includes small particles having the Heywood diameter of 1 μm or less in the cross section of the magnetic core and large particles having the Heywood diameter of 5 μm or more and less than 40 μm. An edge-to-edge distance regarding to a distance between the small particles satisfies 5≤((L1av/dav)×100)≤70. An edge-to-edge distance regarding to a distance between the small particles and the large particles satisfies 0.02 μm≤L2av≤0.13 μm and σ≤0.25 μm.
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公开(公告)号：US20210035720A1
公开(公告)日：2021-02-04
申请号：US16939484
申请日：2020-07-27
Applicant: TDK Corporation
Inventor： Satoko MORI , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hiroyuki MATSUMOTO
Abstract: Provided is a soft magnetic metal powder including a plurality of soft magnetic metal particles. Each of the soft magnetic metal particles includes a metal particle and an oxidized part covering the metal particle. The metal particle includes at least Fe. The oxidized part includes at least one kind of element of S and an element M. The element M is at least one kind of element selected from the group consisting of Nb, Ta, W, Zr, Hf, and Cr. A unit of a concentration of each of S and the element M in the metal particle and the oxidized part is atom %. The concentration of S or the element M in the metal particle and the oxidized part has a maximum value in the oxidized part.
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公开(公告)号：US20210005364A1
公开(公告)日：2021-01-07
申请号：US16977738
申请日：2019-03-01
Applicant: TDK CORPORATION
Inventor： Isao NAKAHATA , Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Akito HASEGAWA
Abstract: A magnetic core and the like having a stable soft magnetic property, including a plurality of soft magnetic layers which are laminated, wherein a crack is formed in the soft magnetic layers. The soft magnetic layers include Fe as a principal component. The soft magnetic layers include a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbPcSidCeSf, wherein: X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, and O and rare-earth elements, M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, V, and W; and a to f and α and β are in predetermined ranges. A structure including a nanoheterostructure or an Fe-group nanocrystal is observed in the soft magnetic layers.
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公开(公告)号：US20180218811A1
公开(公告)日：2018-08-02
申请号：US15880859
申请日：2018-01-26
Applicant: TDK CORPORATION
Inventor： Akihiro HARADA , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hajime AMANO , Kensuke ARA , Seigo TOKORO
IPC: H01F1/153 , H01F1/00 , H01F27/255
CPC classification number: H01F1/15325 , H01F1/0045 , H01F1/15333 , H01F27/255 , H01F41/0226
Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b))MaBb)1−cCc, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group Nb, Hf, Zr, Ta, Mo, W, and V, 0.030≤a≤0.14, 0.005≤b≤0.20, 0≤c≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10≤P/S≤10.
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Patent Agency Ranking
公开(公告)号：US20180122543A1
公开(公告)日：2018-05-03
申请号：US15794578
申请日：2017-10-26
Applicant: TDK CORPORATION
Inventor： Akihiro HARADA , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Akito HASEGAWA , Hajime AMANO , Kensuke ARA , Masahito KOEDA , Seigo TOKORO
Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+d+e))MaBbCrdCue)1−fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030≤a≤0.14, 0.028≤b≤0.15, 0.005≤d≤0.020, 0
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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
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.
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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
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.
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公开(公告)号：US20220319748A1
公开(公告)日：2022-10-06
申请号：US17672373
申请日：2022-02-15
Applicant: TDK CORPORATION
Inventor： Hironobu KUMAOKA , Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Akito HASEGAWA
Abstract: A soft magnetic alloy including an internal area having a soft magnetic type alloy composition including Fe and P (phosphorous), and
a P concentrated area existing closer to a surface side than the internal area and having a higher P concentration than in the internal area.-
公开(公告)号：US20190385770A1
公开(公告)日：2019-12-19
申请号：US16430585
申请日：2019-06-04
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Hiroyuki MATSUMOTO , Kenji HORINO , Hajime AMANO , Akito HASEGAWA
Abstract: A soft magnetic alloy includes a composition of (Fe(1-(α+β))X1αX2β)(1-(a+b+c+d+e+f+g))MaTibBcPdSieSfCg. 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+b≤0.140, 0.001≤b≤0.140, 0.020
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