US 11,887,785 B2
Multilayer ceramic capacitor and ceramic material powder
Katsuya Taniguchi, Takasaki (JP); and Tsuyoshi Sogabe, Takasaki (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Feb. 18, 2021, as Appl. No. 17/179,180.
Application 17/179,180 is a continuation of application No. 16/286,356, filed on Feb. 26, 2019, granted, now 10,957,485.
Claims priority of application No. 2018-039972 (JP), filed on Mar. 6, 2018; and application No. 2018-220281 (JP), filed on Nov. 26, 2018.
Prior Publication US 2021/0183571 A1, Jun. 17, 2021
Int. Cl. H01G 4/30 (2006.01); H01G 4/12 (2006.01); H01G 4/228 (2006.01); H01G 4/012 (2006.01)
CPC H01G 4/1209 (2013.01) [H01G 4/012 (2013.01); H01G 4/228 (2013.01); H01G 4/30 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A multilayer ceramic capacitor comprising:
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, said perovskite structure being selected from the group consisting of BaTiO3, CaZrO3, CaTiO3, SrTiO3, and Ba1-x-yCaxSryTi1-zZr2O3 (0≤y≤1, x=0, z=0),
wherein a B site of the ceramic material includes an element acting as a donor,
wherein a rare earth element is solid-solved in each of A site and B site,
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,
wherein the amount of the element that acts as the donor and is substitutionally solid-solved in the B site is 0.05 at% or more and 0.3 at% or less when an amount of a main component element of the B site is 100 at%.