US 11,756,737 B2
Multi-layer ceramic capacitor
Kotaro Mizuno, Tokyo (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Jan. 31, 2022, as Appl. No. 17/589,344.
Claims priority of application No. 2021-032288 (JP), filed on Mar. 2, 2021.
Prior Publication US 2022/0285100 A1, Sep. 8, 2022
Int. Cl. H01G 4/30 (2006.01); H01G 4/012 (2006.01); H01G 4/12 (2006.01)
CPC H01G 4/30 (2013.01) [H01G 4/012 (2013.01); H01G 4/1227 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A multi-layer ceramic capacitor, comprising:
a multi-layer unit that includes a plurality of ceramic layers laminated in a direction of a first axis and a plurality of internal electrodes disposed between the plurality of ceramic layers, positions of end portions of the plurality of internal electrodes in a direction of a second axis perpendicular to the first axis falling within a range of 0.5 μm in the direction of the second axis; and
a first side margin and a second side margin each containing at least one of manganese or magnesium and silicon and facing each other in the direction of the second axis with the multi-layer unit sandwiched therebetween, wherein
when each of the first side margin and the second side margin is equally divided, in the direction of the second axis, into a first inner region and a first outer region, the first inner region being in contact with the multi-layer unit,
a total concentration of manganese and magnesium in the first outer region is higher than a total concentration of manganese and magnesium in the first inner region and higher than a total concentration of manganese and magnesium in the plurality of ceramic layers, and
a concentration of silicon in the first inner region is equal to or higher than a concentration of silicon in the first outer region and higher than a concentration of silicon in the plurality of ceramic layers.