公开(公告)号：US09688582B2

公开(公告)日：2017-06-27

申请号：US15064436

申请日：2016-03-08

Applicant: TDK CORPORATION

Inventor： Toshihiko Kaneko ,  Tatsuya Fujino ,  Takeru Yoshida ,  Haruki Ebina ,  Nobuto Morigasaki

IPC: C04B35/468 ,  H01G4/12 ,  C04B35/465 ,  C04B35/47 ,  C04B35/488 ,  C04B35/49 ,  H01G4/30

CPC classification number: C04B35/4682 ,  C04B35/465 ,  C04B35/47 ,  C04B35/488 ,  C04B35/49 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3248 ,  C04B2235/3249 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/5454 ,  C04B2235/6025 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6584 ,  C04B2235/6588 ,  C04B2235/768 ,  C04B2235/79 ,  C04B2237/68 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1236 ,  H01G4/1245 ,  H01G4/30

Abstract: A dielectric ceramic composition and a ceramic electric device having a dielectric layer composed of the dielectric ceramic composition including a main component having a perovskite crystal structure expressed by general formula ABO3, an oxide of Eu, an oxide of Ra (Sc, Er, Tm, Yb and Lu), an oxide of Rb (Y, Dy, Ho, Tb and Gd) and an oxide of Si, in which 0.075≦α≦0.5, 0.5≦β≦3, 1.0≦γ≦4, 1.5≦δ≦5, and 0.030≦α/δ≦0.250 where a content of an oxide of Eu is α mole, a content of the oxide of Ra is β mole, a content of the oxide of Rb is γ mole, and a content of the second sub-component is δ mole with respect to 100 moles of the main component.

公开(公告)号：US09440885B2

公开(公告)日：2016-09-13

申请号：US14663160

申请日：2015-03-19

Applicant: TDK CORPORATION

Inventor： Nobuto Morigasaki ,  Takeru Yoshida ,  Tomohisa Fukuoka ,  Yuhta Matsunaga ,  Kazuhiro Komatsu

IPC: C04B35/00 ,  C04B35/468 ,  C04B35/638 ,  H01G4/12

CPC classification number: C04B35/4682 ,  C04B35/638 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/5445 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6584 ,  C04B2235/79 ,  C04B2235/85 ,  H01G4/1227

Abstract: A dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of a rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as rbmax, a minimum particle size of the segregation particle is defined as rbmin, and an average particle size of the dielectric particle having the core-shell structure is defined as ra, a relation of rbmax/ra≦2.00 and rbmin/ra≧0.25 is satisfied, and the segregation particles substantially do not include Mg.

Abstract translation: 电介质陶瓷组合物至少包括具有核 - 壳结构和偏析粒子的电介质粒子，偏析粒子中稀土化合物的浓度是电介质的外壳部分中稀土化合物的平均浓度的两倍或更多 具有核 - 壳结构的粒子，由偏析粒子占据的面积为0.1〜1.1％，将分离粒子的最大粒径定义为rbmax时，将分离粒子的最小粒径定义为rbmin，将 具有核 - 壳结构的电介质粒子的平均粒径被定义为ra，满足rbmax /ra≤2.00和rbmin /ra≥0.25的关系，并且偏析粒子基本上不包括Mg。

公开(公告)号：US11373807B2

公开(公告)日：2022-06-28

申请号：US16136661

申请日：2018-09-20

Applicant: TDK CORPORATION

Inventor： Keiichi Takizawa ,  Naoto Imaizumi ,  Shogo Murosawa ,  Takeru Yoshida

IPC: H01G4/232 ,  H01G4/005 ,  H01G2/06 ,  H01G4/30 ,  H01G4/12

Abstract: An electronic component device includes: an electronic component having: a base body having a pair of end surfaces facing each other and four side surfaces connecting the pair of end surfaces; and a pair of outer electrodes disposed on respective sides of the pair of end surfaces; metal terminals respectively electrically connected to the pair of outer electrodes; and joint portions joining and electrically connecting the outer electrodes to the metal terminals respectively, wherein the electronic component has a metal portion disposed on at least one surface of the four side surfaces, and the metal portion has a baked metal layer.

公开(公告)号：US10804032B2

公开(公告)日：2020-10-13

申请号：US15875617

申请日：2018-01-19

Applicant: TDK CORPORATION

Inventor： Takeru Yoshida ,  Takuya Imaeda ,  Shogo Murosawa ,  Hideki Kamo ,  Naoto Imaizumi ,  Keiichi Takizawa

IPC: H01G4/002 ,  H01G4/012 ,  H01G4/248 ,  H01G4/30 ,  H05K1/18 ,  H05K1/11 ,  H01G4/38 ,  H01G4/232 ,  H05K3/34

Abstract: A multilayer capacitor includes an element assembly, a first external electrode, a second external electrode, and a plurality of internal electrodes which are disposed at the inside of the element assembly. The plurality of internal electrodes include a first internal electrode that is electrically connected to the first external electrode, a second internal electrode that is electrically connected to the second external electrode, and a plurality of third internal electrodes. The plurality of third internal electrodes are electrically connected to each other by a first connection conductor and a second connection conductor, a first capacitance portion is constituted by the first internal electrode and the third internal electrodes, a second capacitance portion is constituted by the second internal electrode and the third internal electrodes, and the first capacitance portion and the second capacitance portion are electrically connected in series.

公开(公告)号：US10546694B2

公开(公告)日：2020-01-28

申请号：US16122217

申请日：2018-09-05

Applicant: TDK CORPORATION

Inventor： Takeru Yoshida ,  Hideki Kamo ,  Naoto Imaizumi ,  Keiichi Takizawa ,  Takuya Imaeda ,  Shogo Murosawa

IPC: H01G2/06 ,  H01G4/005 ,  H01G4/12 ,  H01G4/224 ,  H01G4/30 ,  H05K1/03

Abstract: A multilayer capacitor includes an element, a first external electrode, a second external electrode, and a plurality of internal electrodes. The plurality of internal electrodes include first internal electrodes, second internal electrodes, and a plurality of third internal electrodes. The plurality of third internal electrodes are electrically connected by a connection conductor. First capacity parts are constituted of the first internal electrodes and the third internal electrodes, and second capacity parts are constituted of the second internal electrodes and the third internal electrodes. The first capacity part and the second capacity part are electrically connected in series, and the connection conductor is disposed on at least one of the three lateral surfaces other than the lateral surface that is a mounting surface, among the four lateral surfaces.