公开(公告)号：US20230090201A1

公开(公告)日：2023-03-23

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 ,  H01G4/008 ,  C04B35/468

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：US20230072034A1

公开(公告)日：2023-03-09

申请号：US17903302

申请日：2022-09-06

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Yoshitaka NAGASHIMA ,  Yasuhiro OKUI ,  Masahide ISHIZUYA ,  Yuuki HIDAKA

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

Abstract: A multilayer electronic component includes a plurality of dielectric layers and a plurality of electrode layers that are alternately stacked. A skewness of a distribution of thicknesses of the plurality of dielectric layers at a plurality of arbitrary locations of the plurality of dielectric layers is 0.2 or more.

公开(公告)号：US20220293343A1

公开(公告)日：2022-09-15

申请号：US17685018

申请日：2022-03-02

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Yuichiro SUEDA ,  Ryota NAMIKI

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/232

Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal, electrode layer. The element body includes a boundary layer at an end of the ceramic layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The boundary layer includes Ba and Ti as a main component. The boundary layer includes 0.27-0.40 parts by mol of Ba, provided that a total of Ba and Ti included in the boundary layer is 1 part by mol.

公开(公告)号：US20220285096A1

公开(公告)日：2022-09-08

申请号：US17683518

申请日：2022-03-01

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Yuichiro SUEDA ,  Ryota NAMIKI

IPC: H01G4/232 ,  H01G4/30 ,  H01G4/12

Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal electrode layer. At least a part of a joint boundary between the electrode layer and the ceramic layer includes an interface protrusion on the external electrode side. The interface protrusion is made of an oxide.

公开(公告)号：US20210366654A1

公开(公告)日：2021-11-25

申请号：US17322079

申请日：2021-05-17

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Norihisa ANDO ,  Kenya TAMAKI ,  Kayou MATSUNAGA

IPC: H01G4/012 ,  H01G4/30 ,  H01G4/12 ,  H01G4/008 ,  H01G2/06

Abstract: An electronic component according to the present invention is an electronic component including: a ceramic element body including an internal electrode; and an external electrode formed on an outer surface of the ceramic element body. The external electrode includes: a first electrode layer electrically connected to at least a part of the internal electrode; and a second electrode layer formed on an outside of the first electrode layer. The first electrode layer has a first conductor region containing copper, and the second electrode layer has a second conductor region including a matrix phase containing silver and palladium and copper particles dispersed in the matrix phase.

公开(公告)号：US20210183573A1

公开(公告)日：2021-06-17

申请号：US17115210

申请日：2020-12-08

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI

IPC: H01G4/12

Abstract: A dielectric composition includes a main phase and a Ca—Zr—Si—O segregation phase. The main phase includes a main component expressed by ABO3. “A” includes at least one selected from calcium and strontium. “B” includes at least one selected from zirconium, titanium, hafnium, and manganese. The Ca—Zr—Si—O segregation phase includes at least calcium, zirconium, and silicon. The Ca—Zr—Si—O segregation phase includes 0.12-0.50 parts by mol of zirconium, provided that a total of calcium, strontium, silicon, and zirconium included in the Ca—Zr—Si—O segregation phase is 1 part by mol.

公开(公告)号：US20210065979A1

公开(公告)日：2021-03-04

申请号：US16937029

申请日：2020-07-23

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI

IPC: H01G4/12 ,  C04B35/495

Abstract: Provided is a dielectric composition exhibiting a high specific dielectric constant and a high resistivity even when fired in a reducing atmosphere. The dielectric composition contains a composite oxide having a composition represented by (SrxBa1-x)yNb2O5+y, the crystal system of the composite oxide is tetragonal, and y in the composition formula is smaller than 1.

公开(公告)号：US20210061718A1

公开(公告)日：2021-03-04

申请号：US16944301

申请日：2020-07-31

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI

IPC: C04B35/50 ,  H01G11/30

Abstract: Provided is a dielectric composition exhibiting a high strength and a high specific dielectric constant. The dielectric composition contains composite oxide particles having a composition formula represented by (SrxBa1-x)yNb2O5+y and an Al-based segregation phase. The Al segregation phase has niobium, aluminum, and oxygen.

公开(公告)号：US20130222974A1

公开(公告)日：2013-08-29

申请号：US13773347

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 ,  C04B35/495 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/76 ,  C04B2235/79 ,  C04B2235/9615 ,  H01G4/1254 ,  H01G4/30

Abstract: Dielectric ceramic composition comprising a compound shown by a general formula {A1−x(RE)2x/3}y-B2O5+y and has a tungsten bronze-type structure. In the formula, “A” is at least one selected from a group comprising Ba, Ca, Sr and Mg, “B” 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, and said “x” and “y” satisfies 0 1.000, respectively. The dielectric ceramic composition further comprises an oxide of at least one selected from V, Mo, Fe, W, Mn and Cr.

Abstract translation: 电介质陶瓷组合物，其包含通式{A1-x（RE）2x / 3} y-B2O5 + y所示的化合物，并具有钨青铜型结构。 在该式中，“A”为选自Ba，Ca，Sr和Mg的组中的至少一种，“B”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，所述“x”和“y”分别满足0 电介质陶瓷组合物还包含选自V，Mo，Fe，W，Mn和Cr中的至少一种的氧化物。

公开(公告)号：US20240112865A1

公开(公告)日：2024-04-04

申请号：US18464467

申请日：2023-09-11

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Daisuke YOSHIDA ,  Kazunori OSHIMA

IPC: H01G4/30 ,  H01G4/012 ,  H01G4/10 ,  H01G4/248

CPC classification number: H01G4/30 ,  H01G4/012 ,  H01G4/10 ,  H01G4/248

Abstract: An electronic device includes an element body. The element body includes a first internal electrode layer, a second internal electrode layer, and a dielectric layer laminated between the first internal electrode layer and the second internal electrode layer. Ni oxide particles exist at a first boundary between the first internal electrode layer and the dielectric layer. The dielectric layer includes a dielectric large particle in contact with both of the Ni oxide particles at the first boundary and the second internal electrode layer.