公开(公告)号：US20240047136A1

公开(公告)日：2024-02-08

申请号：US18357505

申请日：2023-07-24

Applicant: TDK CORPORATION

Inventor： Taku MURAKAMI ,  Nobuto MORIGASAKI ,  Takuma ARIIZUMI ,  Yoshitaka NAGASHIMA ,  Masato KIMURA

IPC: H01G4/12 ,  H01G4/30

CPC classification number: H01G4/1209 ,  H01G4/30

Abstract: A multilayer electronic device includes an element body and a pair of external electrodes. The element body includes an interior region in which inner dielectric layers and internal electrode layers are alternately laminated and an exterior region located outside the interior region in its lamination direction. The pair of external electrodes exists on surfaces of the element body. Main-phase particles in the inner dielectric layers and outer dielectric layers of the exterior region include a main component having a perovskite crystal structure represented by a general formula of ABO3. r1

公开(公告)号：US20220254567A1

公开(公告)日：2022-08-11

申请号：US17588511

申请日：2022-01-31

Applicant: TDK CORPORATION

Inventor： Taku MURAKAMI ,  Nobuto MORIGASAKI ,  Takuma ARIIZUMI ,  Toshihiko KANEKO ,  Yasuhiro ITO

IPC: H01G4/12 ,  C04B35/01 ,  H01G4/30

Abstract: A dielectric composition includes a main-phase particle and segregation particles. The main-phase particle includes a main component having a perovskite crystal structure represented by a general formula of ABO3. The dielectric composition includes RA, RB, M, and Si. Each of A, B, RA, RB, and M is one or more elements selected from a specific element group. Each of an RA content CRA to the main component, an RB content CRB to the main component, an M content to the main component, and a Si content to the main component is within a predetermined range. 0.50

公开(公告)号：US20170283328A1

公开(公告)日：2017-10-05

申请号：US15466247

申请日：2017-03-22

Applicant: TDK CORPORATION

Inventor： Dan SAKURAI ,  Nobuto MORIGASAKI ,  Tatsuya ISHII ,  Takuma ARIIZUMI

IPC: C04B35/49 ,  H01G4/005 ,  H01G4/30 ,  H01G4/12 ,  C04B35/626 ,  C04B35/64

CPC classification number: C04B35/49 ,  C04B35/4682 ,  C04B35/6261 ,  C04B35/64 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3241 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3418 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/662 ,  C04B2235/768 ,  H01G4/005 ,  H01G4/1227 ,  H01G4/1245 ,  H01G4/30

Abstract: The object of the present invention is to provide the dielectric ceramic composition having good characteristics even under the high electric field intensity, and particularly good IR characteristic and the high temperature accelerated lifetime. The dielectric ceramic composition according to the present invention comprises a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, said “m”, “x”, “y” and “z” all show a mol ratio, and each satisfies 0.94≦m≦1.1, 0≦x≦0.2, 0≦y≦0.2, 0.06≦z