公开(公告)号：US10650966B2

公开(公告)日：2020-05-12

申请号：US16270975

申请日：2019-02-08

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi

IPC: H01G4/30 ,  H01G4/015 ,  H01G4/008 ,  H01G4/12 ,  H01G4/232 ,  H01G4/248

Abstract: A multilayer ceramic electronic component such as a multilayer ceramic capacitor capable of maintaining insulation properties even when a current is passed through the capacitor after an occurrence of a short-circuit due to, for example, a high voltage or a high current is provided. A multilayer ceramic electronic component including an element body 4 formed by laminating dielectric layers 10 and internal electrode layers 12 alternately. The internal electrode layers contains copper and/or silver as a main component. The dielectric voidage is lower than the internal electrode voidage.

公开(公告)号：US20130222969A1

公开(公告)日：2013-08-29

申请号：US13773370

申请日：2013-02-21

Applicant: TDK Corporation

Inventor： Toshihiro Iguchi ,  Akitoshi Yoshii ,  Tatsuya Kojima ,  Satoshi Takagi

IPC: C04B35/50 ,  H01G4/12

CPC classification number: C04B35/50 ,  C01G33/006 ,  C04B35/495 ,  C04B35/6263 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/656 ,  C04B2235/6562 ,  C04B2235/76 ,  C04B2235/78 ,  C04B2235/9615 ,  H01G4/1209 ,  H01G4/1254 ,  H01G4/30

Abstract: A dielectric ceramic composition comprising a compound shown by a general formula {A1−x(RE)2x/3}y-D2O5+y having tungsten bronze-type structure and an oxide of “M”. “A” is at least one selected from Ba, Ca, Sr and Mg, “D” is at least one selected from Nb and Ta, “RE” is at least one selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, “x” and “y” satisfies 0 0, respectively and said “M” is at least one selected from Al, Si, B and Li. It is preferable to further comprise Mg oxide.

Abstract translation: 一种电介质陶瓷组合物，其包含具有钨青铜型结构和“M”氧化物的通式{A1-x（RE）2x / 3} y-D2O5 + y所示的化合物。 “A”为选自Ba，Ca，Sr和Mg中的至少一种，“D”为选自Nb和Ta中的至少一种，“RE”为选自Sc，Y，La，Ce，Pr，Nd ，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb和Lu，“x”和“y”分别满足0 0，所述“M” 来自Al，Si，B和Li。 优选还包含Mg氧化物。

公开(公告)号：US12283430B2

公开(公告)日：2025-04-22

申请号：US17894293

申请日：2022-08-24

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi ,  Tetsuhiro Takahashi ,  Tomohisa Fukuoka

IPC: H01G4/232 ,  H01G4/30

Abstract: A ceramic electronic device includes an element body including a ceramic layer and an internal electrode layer, and an external electrode formed on an end surface of the element body and electrically connected to at least one end of the internal electrode layer. The external electrode includes a baked electrode layer. The baked electrode layer includes a main component comprising copper and/or a copper alloy. The baked electrode layer includes a void. An inner wall surface defining the void is at least partly covered by a film comprising nickel and/or a nickel alloy.

公开(公告)号：US20240321518A1

公开(公告)日：2024-09-26

申请号：US18609537

申请日：2024-03-19

Applicant: TDK Corporation

Inventor： Tomohisa FUKUOKA ,  Toshihiro Iguchi

IPC: H01G4/232 ,  H01G2/06 ,  H01G4/008 ,  H01G4/012 ,  H01G4/30

CPC classification number: H01G4/232 ,  H01G2/065 ,  H01G4/008 ,  H01G4/012 ,  H01G4/30

Abstract: An electronic component includes an element body portion and a terminal electrode portion formed. The terminal electrode portion includes a base electrode layer that is in direct contact with the end surface and a surface electrode layer that covers the base electrode layer and constitutes an outermost surface of the terminal electrode portion. A relation between a thickness T2 of the surface electrode layer and a thickness T4 of the surface electrode layer satisfies 1.3≤T4/T2≤15.0, while the T2 is along a second reference line parallel to the lower surface and passes through a height of three quarters of the entire element body portion from the lower surface, and the T4 is along a fourth reference line parallel to the lower surface and passes through a height of one quarter of the entire element body portion from the lower surface.

公开(公告)号：US11894194B2

公开(公告)日：2024-02-06

申请号：US17876162

申请日：2022-07-28

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi ,  Tomoaki Nonaka ,  Takeshi Shouji

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/012 ,  C04B35/468 ,  H01G4/008

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  H01G4/008 ,  H01G4/012 ,  H01G4/30 ,  C04B2235/3208 ,  C04B2235/768 ,  C04B2235/96

Abstract: A dielectric composition includes a dielectric grain including a perovskite compound and a first segregation phase including at least Ca, Al, Si, and O.

公开(公告)号：US11873255B2

公开(公告)日：2024-01-16

申请号：US17558077

申请日：2021-12-21

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi ,  Tetsuhiro Takahashi ,  Hiroki Akiba ,  Ryota Nomura

IPC: C04B35/495 ,  H01G4/12

CPC classification number: C04B35/495 ,  H01G4/1254 ,  C04B2235/765

Abstract: In order to provide a dielectric composition having high density even when fired at a relatively low temperature, the main component of a dielectric composition includes tantalum and at least one of barium or strontium, and the subcomponent of the dielectric composition includes at least one element selected from the group consisting of vanadium, titanium, and aluminum.

公开(公告)号：US11842855B2

公开(公告)日：2023-12-12

申请号：US17521305

申请日：2021-11-08

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi ,  Masahide Ishizuya ,  Takeshi Shibahara

IPC: H01G4/30 ,  H01G4/012 ,  H01G4/12

CPC classification number: H01G4/30 ,  H01G4/012 ,  H01G4/12

Abstract: To provide a multilayer electronic component of which a reliability is not compromised and also a crack is suppressed from forming even when the multilayer electronic component is made thinner. A multilayer electronic component including an element body in which at least one dielectric layer and at least one internal electrode layer are stacked in an alternating manner, wherein a thickness variation of the at least one internal electrode layer is larger than a thickness variation of the at least one dielectric layer.

公开(公告)号：US11657972B2

公开(公告)日：2023-05-23

申请号：US17361826

申请日：2021-06-29

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/008 ,  C04B35/468 ,  H01G4/012

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  H01G4/008 ,  H01G4/012 ,  H01G4/30 ,  C04B2235/66

Abstract: A dielectric composition includes dielectric particles. At least one of the dielectric particles include a main phase and a secondary phase. The main phase has a main component of barium titanate. The secondary phase exists inside the main phase and has a higher barium content than the main phase.

公开(公告)号：US11639313B2

公开(公告)日：2023-05-02

申请号：US17551633

申请日：2021-12-15

Applicant: TDK CORPORATION

Inventor： Dan Sakurai ,  Yasuhiro Ito ,  Nobuto Morigasaki ,  Toshihiko Kaneko ,  Toshihiro Iguchi

IPC: C04B35/47 ,  H01B3/12

Abstract: A dielectric ceramic composition contains dielectric particles containing a main component represented by a composition formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 and grain boundaries present between the dielectric particles. The values of m, x, y, and z in the composition formula are all molar ratios. In the composition formula, 0.9≤m≤1.4, 0≤x

公开(公告)号：US10991511B2

公开(公告)日：2021-04-27

申请号：US16559242

申请日：2019-09-03

Applicant: TDK CORPORATION

Inventor： Toshihiro Iguchi

IPC: C04B35/495 ,  H01G4/12 ,  H01G4/30 ,  C04B35/626 ,  C04B35/634 ,  C04B35/64 ,  H01G4/012

Abstract: A dielectric composition including a complex oxide represented by a general formula of AaBbC4O15+α as a main component, in which “A” at least includes Ba, “B” at least includes Zr, “C” at least includes Nb, “a” is 3.05 or more, and “b” is 1.01 or more.