Patent ID: 11948747
Assignee: TAIYO YUDEN CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 2:
3. A multilayer ceramic capacitor comprising:
a multilayer structure having a structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked and having a substantially rectangular parallelepiped shape,
wherein each of the plurality of internal electrode layers are alternately exposed to each of two different faces of the rectangular parallelepiped shape,
wherein a section in which internal electrode layers exposed to the two different faces face each other is a capacity section,
wherein dielectric layers in the capacity section have a plurality of crystal grains of which a main component is barium titanate and an additive including Zr, Eu and Mn,
wherein at least one of the plurality of crystal grains has a core-shell structure having a core and a shell, a main component of the core being barium titanate, a main component of the shell being barium titanate, a Zr concentration of the shell being higher than that of the core,
wherein a Zr/Ti atomic concentration ratio of the dielectric layers in the capacity section is 0.02 or more and 0.10 or less,
wherein an Eu/Ti atomic concentration ratio of the dielectric layers in the capacity section is 0.001 or more and 0.03 or less,
wherein a Mn/Ti atomic concentration ratio of the dielectric layers in the capacity section is 0.005 or more and 0.05 or less,
wherein the dielectric layers in the capacity section has one or more rare earth elements other than Eu, or does not have any rare earth element other than Eu,
wherein a total atomic concentration of the one or more rare elements is smaller than an atomic concentration of Eu when of the dielectric layers in the capacity section has the one or more rare earth elements,
wherein a median diameter of the plurality of crystal grains is 200 nm or more and 400 nm or less.