公开(公告)号：US20240409470A1

公开(公告)日：2024-12-12

申请号：US18733552

申请日：2024-06-04

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki MISAWA ,  Keiichi HATANO

IPC: C04B35/468 ,  H01G4/12 ,  H01G4/30

Abstract: A dielectric ceramic composition includes a first crystal grain that has a perovskite structure expressed by a general formula of BaCaTiO3, and has a core portion and a shell portion surrounding the core portion and including a rare earth element and manganese, and a second crystal grain in which an elemental ratio of total of barium and calcium to titanium is 0.70 or less and a main component is barium calcium titanate.

公开(公告)号：US20230317341A1

公开(公告)日：2023-10-05

申请号：US18185801

申请日：2023-03-17

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki MISAWA

IPC: H01F17/00 ,  H01F27/29 ,  H01F27/255

CPC classification number: H01F17/0013 ,  H01F27/292 ,  H01F27/255

Abstract: One object of the disclosure is to configure a coil component to inhibit ion migration of metals contained in a coil conductor not coated with a glass layer or a resin layer. A coil component includes a base body and a coil conductor disposed in the base body and made mainly of copper. A copper oxide film is formed on the surface of the coil conductor. The base body includes a plurality of metal magnetic particles, the plurality of metal magnetic particles containing Fe, Si, and an element A, the element A being at least one selected from the group consisting of Cr and Al. The surface of the metal magnetic particles is coated with an oxide film. In the oxide film, a sum of an atomic percentage of Si and an atomic percentage of the element A is higher than an atomic percentage of Fe.

公开(公告)号：US20230068049A1

公开(公告)日：2023-03-02

申请号：US17972441

申请日：2022-10-24

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki MISAWA ,  Kinshiro TAKADATE ,  Shinsuke TAKEOKA

IPC: H01F27/28 ,  H05K1/18 ,  H01F41/02 ,  H01F41/06 ,  H01F27/24

Abstract: A method for manufacturing a coil component includes: providing multiple metal magnetic grains; preparing a magnetic body paste by mixing the multiple metal magnetic grains, a binder resin containing a resinate having at least one element selected from the group consisting of Si, Al, Cr, Mg, Ti, and Zr, and a solvent; forming a compact using the magnetic body paste; heat-treating the compact to form, on surfaces of the metal magnetic grains, bonding parts constituted by an amorphous oxide containing carbon and the at least one element, thereby forming a magnetic base body wherein the multiple metal magnetic grains are bonded via the bonding parts; forming a coil that includes a metal conductor; and forming external eletrodes on surfaces of the magnetic base body and connecting end parts of the coil to the external electrodes, respectively.

公开(公告)号：US20220293316A1

公开(公告)日：2022-09-15

申请号：US17672575

申请日：2022-02-15

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki MISAWA ,  Takashi NAKAJIMA

IPC: H01F1/33 ,  H01F1/147 ,  H01F27/255

Abstract: A magnetic base body is constituted by: metal magnetic grains containing Fe, and Si as an optional component, where the total content of the Fe and Si is 99% by mass or higher; and oxide layers present between the metal magnetic grains; wherein the ratio (IFe2SiO4/IFe) of the strongest diffraction line intensity (IFe2SiO4) observed in a range of 30.8°≤2θ≤32.2° to the strongest diffraction line intensity (IFe) observed in a range of 43.8°≤2θ≤45.2° in X-ray diffraction measurement using the CuKα ray is 0.0020 or higher; and the ratio (IFe2O3/IFe) of the strongest diffraction line intensity (IFe2O3) observed in a range of 33.0°≤2θ≤34.4° to the IFe in X-ray diffraction measurement using the CuKα ray is lower than 0.0010.

公开(公告)号：US20210257147A1

公开(公告)日：2021-08-19

申请号：US17151063

申请日：2021-01-15

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki MISAWA ,  Kinshiro TAKADATE ,  Shinsuke TAKEOKA

IPC: H01F27/28 ,  H05K1/18 ,  H01F27/24 ,  H01F41/02 ,  H01F41/06

Abstract: A magnetic base body comprises multiple metal magnetic grains and bonding parts for bonding the multiple metal magnetic grains, wherein the bonding parts are constituted by an amorphous mixture containing carbon and an oxide of at least one element selected from silicon, aluminum, chromium, magnesium, titanium, and zirconium. A coil component using the magnetic base body can improve mechanical strength while ensuring insulation reliability.