公开(公告)号：US20210183571A1

公开(公告)日：2021-06-17

申请号：US17179180

申请日：2021-02-18

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Katsuya TANIGUCHI ,  Tsuyoshi SOGABE

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/228 ,  H01G4/012

Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which dielectric layers and internal electrode layers are alternately stacked; wherein a main component of the dielectric layers is a ceramic material having a main phase having a perovskite structure (ABO3) wherein a B site includes an element solid-solved in the B site and acting as a donor; wherein an A site and the B site of the ceramic material includes a rare earth element, wherein (an amount of the rare earth element substitutionally solid-solved in the A site)/(an amount of the rare earth element substitutionally solid-solved in the B site) is 0.75 or more and 1.25 or less. The amount of the element acting as the donor in the B site is 0.05 to 0.3 atm % relative to a main component element of the B site.

公开(公告)号：US20220135485A1

公开(公告)日：2022-05-05

申请号：US17578249

申请日：2022-01-18

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Katsuya TANIGUCHI ,  Tsuyoshi SOGABE

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

Abstract: Ceramic raw material powder includes: a main phase having a perovskite structure, wherein elements acting as a donor and an acceptor are solid-solved in B sites of the perovskite structure, wherein a first relationship of value A value B is satisfied in a circumference region of each grain of the ceramic raw material powder, and value A in the second relationship gradually decreases from the circumference region to the center, wherein value A is a value of (concentration of the element acting as a donor)×(valence of the element acting as a donor−4), and value B is a value of (concentration of the element acting as an acceptor)×(4−valence of the element acting as an acceptor).

公开(公告)号：US20190279816A1

公开(公告)日：2019-09-12

申请号：US16286356

申请日：2019-02-26

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Katsuya TANIGUCHI ,  Tsuyoshi SOGABE

IPC: H01G4/12 ,  H01G4/012 ,  H01G4/228 ,  H01G4/30

Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of internal electrode layers are alternately stacked; wherein a main component of the dielectric layers is a ceramic material, wherein a main phase of the ceramic material has a perovskite structure expressed by a general formula ABO3, wherein a B site of the ceramic material includes an element acting as a donor; wherein an A site and the B site of the ceramic material includes a rare earth element, wherein (an amount of the rare earth element substitutionally solid-solved in the A site)/(an amount of the rare earth element substitutionally solid-solved in the B site) is 0.75 or more and 1.25 or less.