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公开(公告)号：US11545287B2
公开(公告)日：2023-01-03
申请号：US15694509
申请日：2017-09-01
Applicant: TDK CORPORATION
Inventor： Ryoma Nakazawa , Yousuke Futamata , Takeshi Takahashi
IPC: H01F1/24 , H01F3/08 , B22F9/02 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/10 , C22C45/02 , B29B7/90 , B29C43/00 , B22F1/16 , B29K105/16 , B29K505/00 , H01F41/02
Abstract: A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 μm and 200 μm or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.
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公开(公告)号：US11780767B2
公开(公告)日：2023-10-10
申请号：US16923552
申请日：2020-07-08
Applicant: TDK CORPORATION
Inventor： Shin Takane , Yousuke Futamata , Kenichi Sakai , Yasuharu Miyauchi
CPC classification number: C03C10/0009 , B32B17/06 , C03C10/0036 , C03C10/0045 , H01L23/15 , H05K1/0306 , B32B2307/206 , B32B2315/08 , B32B2457/08 , C03C2204/00 , H05K1/0298
Abstract: A glass ceramic sintered body having a small dielectric loss in a high frequency band of 10 GHz or higher and a wiring substrate using the same are provided. The glass ceramic sintered body contains crystallized glass, an alumina filler, and silica. The content of the crystallized glass is 45 mass % to 85 mass %, the content of the alumina filler is 14.8 mass % to 50.1 mass % in terms of Al2O3, and the content of silica is 0.2 mass % to 4.9 mass % in terms of SiO2.
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Patent Agency Ranking
公开(公告)号：US10811176B2
公开(公告)日：2020-10-20
申请号：US15913964
申请日：2018-03-07
Applicant: TDK CORPORATION
Inventor： Yousuke Futamata , Ryoma Nakazawa , Takeshi Takahashi , Junichi Shimamura
Abstract: A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe—Si—O based oxide. The insulation film includes a Si—O based oxide.
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公开(公告)号：US20240332823A1
公开(公告)日：2024-10-03
申请号：US18619654
申请日：2024-03-28
Applicant: TDK Corporation
Inventor： Kenichi TEZUKA , Yasuharu Miyauchi , Yousuke Futamata , Misaki Tabata
Abstract: An antenna device includes: a dielectric layer; radiation conductors and a ground conductor disposed at the dielectric layer; and side surface conductors in which a plurality of conductor patterns are laminated, the side surface conductors are disposed on an outer side of the ground conductors in a first direction in plan view seen from a normal direction of the radiation conductors, and the dimensions of the side surface conductors in a second direction perpendicular to the first direction are larger than the dimensions in the second direction of the radiation conductors.
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公开(公告)号：US11043320B2
公开(公告)日：2021-06-22
申请号：US15915901
申请日：2018-03-08
Applicant: TDK CORPORATION
Inventor： Masahiro Kamiya , Yasuhide Yamashita , Chiomi Sato , Yousuke Futamata , Ryoma Nakazawa , Takeshi Takahashi , Hiroyuki Ono
Abstract: A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.
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公开(公告)号：US11267749B2
公开(公告)日：2022-03-08
申请号：US16923531
申请日：2020-07-08
Applicant: TDK CORPORATION
Inventor： Shin Takane , Yousuke Futamata , Yasuharu Miyauchi
Abstract: A glass ceramic sintered body having a small dielectric loss in a high frequency band of 10 GHz or higher and stable characteristics against temperature variation and a wiring substrate using the same are provided. The glass ceramic sintered body contains crystallized glass, an alumina filler, silica, and strontium titanate. The content of the crystallized glass is 50 mass % to 80 mass %, the content of the alumina filler is 15.6 mass % to 31.2 mass % in terms of Al2O3, the content of silica is 0.4 mass % to 4.8 mass % in terms of SiO2, and the content of the strontium titanate is 4 mass % to 14 mass % in terms of SrTiO3.
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公开(公告)号：US10727557B2
公开(公告)日：2020-07-28
申请号：US16227558
申请日：2018-12-20
Applicant: TDK CORPORATION
Inventor： Yuta Ashida , Shigemitsu Tomaki , Yousuke Futamata , Shin Takane , Yasuharu Miyauchi , Kazunari Kimura
Abstract: A dielectric filter includes a plurality of dielectric resonators. The dielectric filter also includes: a plurality of resonator body portions each formed of a first dielectric and respectively corresponding to the plurality of dielectric resonators, the first dielectric having a first relative permittivity; a peripheral dielectric portion formed of a second dielectric and lying around the plurality of resonator body portions, the second dielectric having a second relative permittivity lower than the first relative permittivity; and a shield portion formed of a conductor. Either one of a temperature coefficient of resonant frequency of the first dielectric at 25° C. to 85° C. and a temperature coefficient of resonant frequency of the second dielectric at 25° C. to 85° C. has a positive value and the other has a negative value.
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