US 12,080,482 B2
Ceramic electronic device including a rare earth element solid-solved in barium titanate of dielectric layers
Yu Sugawara, Takasaki (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Jun. 12, 2020, as Appl. No. 16/900,587.
Claims priority of application No. 2019-113181 (JP), filed on Jun. 18, 2019; and application No. 2020-070840 (JP), filed on Apr. 10, 2020.
Prior Publication US 2020/0402719 A1, Dec. 24, 2020
Int. Cl. H01G 4/30 (2006.01); H01G 4/12 (2006.01); H01G 4/248 (2006.01)
CPC H01G 4/30 (2013.01) [H01G 4/1227 (2013.01); H01G 4/248 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A ceramic electronic device comprising:
a multilayer chip in which each of dielectric layers and each of internal electrode layers are alternately stacked, a main component of the dielectric layers being BaTiO3,
wherein a rare earth element that is solid-solved in both of an A site and a B site of BaTiO3 of the dielectric layers, consists of Ho,
wherein a total amount of the rare earth element in each of the dielectric layers is 1 mol or less on a presumption that an amount of BaTiO3 is 100 mol,
wherein, in the dielectric layers, an amount of each of MgO and MnO is more than 0 mol, and a total amount of MgO and MnO is 0.08 or more but 0.55 mol or less, on a presumption that an amount of BaTiO3 is 100 mol.