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公开(公告)号：US20190043646A1
公开(公告)日：2019-02-07
申请号：US16055536
申请日：2018-08-06
Applicant: TDK CORPORATION
Inventor： Kazuhiro YOSHIDOME , Akito HASEGAWA , Hiroyuki MATSUMOTO , Kenji HORINO , Akihiro HARADA , Syota GOTO , Isao NAKAHATA
IPC: H01F1/153
Abstract: A soft magnetic alloy is composed of a Fe-based nanocrystal and an amorphous phase. In the soft magnetic alloy, S2-S1>0 is satisfied, where S1 (at %) denotes an average content rate of Si in the Fe-based nanocrystal and S2 (at %) denotes an average content rate of Si in the amorphous phase. In addition, the soft magnetic alloy has a composition formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaBbSicPdCreCuf)1−gCg. 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, Bi, N, O, S and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, V and W. In the composition formula, a to g, α and β are in specific ranges.
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公开(公告)号：US20210035726A1
公开(公告)日：2021-02-04
申请号：US16967934
申请日：2019-03-01
Applicant: TDK CORPORATION
Inventor： Isao NAKAHATA , Hiroyuki MATSUMOTO , Osamu HIROSE
Abstract: A magnetic core excellent in productivity, having stable magnetic characteristics, and easy to handle for a coil device including a conductor and is formed by stacking a plurality of soft magnetic thin ribbons divided into small pieces.
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公开(公告)号：US20190279796A1
公开(公告)日：2019-09-12
申请号：US16296559
申请日：2019-03-08
Applicant: TDK CORPORATION
Inventor： Masakazu HOSONO , Hiroyuki MATSUMOTO , Kenji HORINO , Kazuhiro YOSHIDOME , Isao NAKAHATA , Akito HASEGAWA , Hajime AMANO
Abstract: Soft magnetic alloy powder includes plurality of soft magnetic alloy particles of soft magnetic alloy represented by composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c++e+f+g))MaBbPcSidCeSfTig, wherein X1 represents Co and/or Ni; X2 represents at least one selected from 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 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：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
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
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公开(公告)号：US20210301380A1
公开(公告)日：2021-09-30
申请号：US17211970
申请日：2021-03-25
Applicant: TDK CORPORATION
Inventor： Isao NAKAHATA , Takuya TSUKAHARA
Abstract: An alloy ribbon that is an alloy ribbon containing a metal as a main component, and has a recess on at least one principal surface, in which a depth of the recess is 5% or more and 75% or less of an average thickness.
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Patent Agency Ranking
公开(公告)号：US20180282229A1
公开(公告)日：2018-10-04
申请号：US15765150
申请日：2016-09-30
Applicant: TDK CORPORATION
Inventor： Kumiko YAMAZAKI , Isao NAKAHATA
IPC: C04B35/58 , C04B35/626 , C04B35/64 , C04B35/634 , C04B35/622 , C23C14/28 , C23C14/06 , H01G4/12 , H01G4/33
CPC classification number: C04B35/58014 , C04B35/462 , C04B35/465 , C04B35/495 , C04B35/58007 , C04B35/62218 , C04B35/6262 , C04B35/6264 , C04B35/62655 , C04B35/63416 , C04B35/64 , C04B2235/3201 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3251 , C04B2235/3258 , C04B2235/3895 , C04B2235/604 , C04B2235/606 , C04B2235/6567 , C04B2235/76 , C04B2235/768 , C04B2235/77 , C04B2235/79 , C04B2235/96 , C23C14/0021 , C23C14/0676 , C23C14/088 , C23C14/28 , H01B3/00 , H01G4/12 , H01G4/1209 , H01G4/33
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：US20230368959A1
公开(公告)日：2023-11-16
申请号：US18315581
申请日：2023-05-11
Applicant: TDK CORPORATION
Inventor： Kyotaro ABE , Isao NAKAHATA
IPC: H01F27/255 , H01F27/28 , H01F3/14
CPC classification number: H01F27/255 , H01F27/2823 , H01F3/14
Abstract: A magnetic core includes a first core and a second core. The first core includes a first opposing surface. The second core includes a second opposing surface. The first opposing surface and the second opposing surface are aligned so as to form at least a part of a closed magnetic circuit consisting of the first core and the second core. The first opposing surface and/or the second opposing surface has an arithmetic mean roughness Ra of 7 μm or more and less than 65 μm.
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公开(公告)号：US20210304936A1
公开(公告)日：2021-09-30
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 , H01F1/153 , H01F1/147 , C22C1/00 , C21D9/56 , B22D11/00 , C21D6/00 , C22C45/02 , C22C38/02 , C22C19/07
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：US20210156011A1
公开(公告)日：2021-05-27
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：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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