US 12,249,465 B2
Multilayer ceramic capacitor
Tomohiro Sasaki, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Jan. 27, 2022, as Appl. No. 17/585,648.
Claims priority of application No. 2021-027614 (JP), filed on Feb. 24, 2021.
Prior Publication US 2022/0270825 A1, Aug. 25, 2022
Int. Cl. H01G 4/30 (2006.01); H01G 4/008 (2006.01); H01G 4/012 (2006.01); H01G 4/12 (2006.01); H01G 4/232 (2006.01)
CPC H01G 4/30 (2013.01) [H01G 4/008 (2013.01); H01G 4/012 (2013.01); H01G 4/12 (2013.01); H01G 4/232 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multilayer ceramic capacitor comprising:
a multilayer body including a plurality of laminated dielectric layers, the multilayer body including a first principal surface and a second principal surface facing each other in a height direction, a first end surface and a second end surface facing each other in a length direction orthogonal or substantially orthogonal to the height direction, and a first side surface and a second side surface facing each other in a width direction orthogonal or substantially orthogonal to the height direction and the length direction;
a plurality of first internal electrode layers on the plurality of dielectric layers and extending to the first end surface and the second end surface;
a plurality of second internal electrode layers on the plurality of dielectric layers and extending to the first side surface and the second side surface;
a first external electrode on the first end surface and connected to the first internal electrode layer;
a second external electrode on the second end surface and connected to the first internal electrode layer;
a third external electrode on the first side surface, extending from the first side surface to a portion of the first principal surface and a portion of the second principal surface, and connected to the second internal electrode layer; and
a fourth external electrode on the second side surface, extending from the second side surface to a portion of the first principal surface and a portion of the second principal surface, and connected to the second internal electrode layer; wherein
a number of the first internal electrode layers is greater than a number of the second internal electrode layers, and at least two first internal electrode layers are continuously laminated;
the first internal electrode layer includes a recess not overlapping the third external electrode on a portion of the first principal surface and a portion of the second principal surface and the fourth external electrode on a portion of the first principal surface and a portion of the second principal surface when the multilayer ceramic capacitor is viewed from the height direction;
the second internal electrode layer is between the first internal electrode layer located closest to the first principal surface and the first principal surface and between the first internal electrode layer located closest to the second principal surface and the second principal surface;
a length in the length direction of the second internal electrode layer is smaller than a maximum length in the length direction of the third external electrode on a portion of the first principal surface and a portion of the second principal surface and the fourth external electrode on a portion of the first principal surface and a portion of the second principal surface;
when the multilayer ceramic capacitor is viewed from the height direction, at least a portion of the recess is located between the third external electrode on the portion of the first principal surface and the portion of the second principal surface and the fourth external electrode on the portion of the first principal surface and the portion of the second principal surface;
when the multilayer ceramic capacitor is viewed from the height direction, a distance on a same plane between sides at an end of the third external electrode disposed on the portion of the first principal surface and the portion of the second principal surface and an end of the fourth external electrode disposed on the portion of the first principal surface and the portion of the second principal surface and a side at the end of the recess of the first internal electrode layer is greater than or equal to about 100 μm;
the multilayer body includes:
a pair of capacitance generators arranged in the height direction, in which the plurality of first internal electrode layers and the plurality of second internal electrode layers face each other with the plurality of dielectric layers interposed therebetween to generate a capacitance; and
an internal electrode multilayer unit arranged between the pair of capacitance generators and in which two or more of the first internal electrode layers are continuously laminated;
one of the pair of capacitance generators includes:
one of the second internal electrode layers that is located on a first main surface side with respect to the internal electrode multilayer unit; and
the first internal electrode layer located closest to the first main surface side of the internal electrode multilayer unit; and
the other of the pair of capacitance generators includes:
one of the second internal electrode layers located on a second main surface side with respect to the internal electrode multilayer unit; and
the first internal electrode layer located closest to the second main surface side of the internal electrode multilayer unit.