公开(公告)号：US20180090272A1

公开(公告)日：2018-03-29

申请号：US15705044

申请日：2017-09-14

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kunihiko NAGAOKA ,  Tomoaki NAKAMURA ,  Noriyuki CHIGIRA

IPC: H01G4/12 ,  H01G4/232 ,  H01G4/33

CPC classification number: H01G4/1227 ,  H01G4/0085 ,  H01G4/012 ,  H01G4/1209 ,  H01G4/232 ,  H01G4/248 ,  H01G4/30 ,  H01G4/33

Abstract: A multilayer ceramic capacitor includes: a first and a second external electrodes; internal electrode layers that are alternately connected to the first and the second external electrodes; and dielectric layers including a ceramic material as a main component, wherein a D20% diameter of the ceramic material of an end margin region, in which internal electrode layers connected to one of the first external electrode and the second external electrode face with each other and does not face with internal electrode layers connected to the other, is smaller than that of a capacity region in which internal electrode layers connected to different external electrodes face with each other and a D80% diameter of the ceramic material of the end margin region is larger than that of the capacity region, or 1/(log D80−log D20) of the ceramic material of the capacity region is larger than that of the end margin region.

公开(公告)号：US20190237262A1

公开(公告)日：2019-08-01

申请号：US16250848

申请日：2019-01-17

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kunihiko NAGAOKA ,  Noriyuki CHIGIRA ,  Koichiro MORITA

IPC: H01G4/30 ,  H01G4/008 ,  H01G4/12

CPC classification number: H01G4/30 ,  H01G4/008 ,  H01G4/1227

Abstract: A multilayer ceramic capacitor includes: a ceramic multilayer structure having a structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrode layers are alternately stacked and are alternately exposed to two edge faces of the ceramic multilayer structure; and a pair of external electrodes that are formed on the two edge faces, wherein when an average value of insulation resistances of each pair of the internal electrode adjacent to each other in a stacking direction is IRave and a minimum value of the insulation resistances is IRmin, (IRave−IRmin)/IRave

公开(公告)号：US20180040423A1

公开(公告)日：2018-02-08

申请号：US15655629

申请日：2017-07-20

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kunihiko NAGAOKA ,  Noriyuki CHIGIRA

IPC: H01G4/12 ,  H01G4/012 ,  H01G4/248 ,  H01G4/30

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  C04B2235/3206 ,  C04B2235/3224 ,  C04B2235/3239 ,  C04B2235/3262 ,  H01G4/012 ,  H01G4/248 ,  H01G4/30

Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of ceramic dielectric layers and each of a plurality of internal electrodes are alternately stacked and are alternately exposed to two edge faces of the multilayer structure; a first external electrode that is coupled to one of the two edge faces; and a second external electrode that is coupled to the other of the two edge faces, wherein: a main component of the plurality of ceramic dielectric layers is BaTiO3; the plurality of ceramic dielectric layers include a rare earth element; and an atomic concentration ratio of a total amount of Mn and V with respect to Ti in the plurality of ceramic dielectric layers is 0.035% or more and 0.120% or less.

公开(公告)号：US20170152187A1

公开(公告)日：2017-06-01

申请号：US15364175

申请日：2016-11-29

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kunihiko NAGAOKA ,  Kazumichi HIROI ,  Minoru RYU ,  Chie KAWAMURA

IPC: C04B35/468 ,  H01G4/12 ,  H01G4/005 ,  H01G4/30

CPC classification number: C04B35/4682 ,  C01G23/006 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2002/74 ,  C01P2002/85 ,  C01P2004/62 ,  C01P2006/12 ,  C04B35/62675 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/785 ,  H01G4/005 ,  H01G4/1227 ,  H01G4/30

Abstract: Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XKα) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaLα+TiKα) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.