US 12,347,621 B2
Multilayer ceramic capacitor including main-surface-side outer layer portions including protective structures
Kenta Hirai, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Feb. 21, 2023, as Appl. No. 18/111,992.
Claims priority of application No. 2022-026304 (JP), filed on Feb. 24, 2022.
Prior Publication US 2023/0268119 A1, Aug. 24, 2023
Int. Cl. H01G 4/224 (2006.01); H01G 4/005 (2006.01); H01G 4/30 (2006.01)
CPC H01G 4/224 (2013.01) [H01G 4/005 (2013.01); H01G 4/30 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A multilayer ceramic capacitor, comprising:
a multilayer body including a plurality of dielectric layers that are laminated, and including a first main surface and a second main surface facing each other in a height direction, 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 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 the width direction;
a first internal electrode layer on the plurality of dielectric layers and exposed to the first end surface;
a second internal electrode layer on the plurality of dielectric layers and exposed to the second end surface;
a first external electrode on the first end surface; and
a second external electrode on the second end surface; wherein
the multilayer body includes:
an inner layer portion in which the plurality of internal electrode layers face each other;
a first main-surface-side outer layer portion on a side of the first main surface, and including a plurality of the dielectric layers between the first main surface, and an outermost surface of the inner layer portion on the side of the first main surface and an extension plane of the outermost surface; and
a second main-surface-side outer layer portion on a side of the second main surface and including a plurality of the dielectric layers between the second main surface, and an outermost surface of the inner layer portion on the side of the second main surface and an extension plane of the outermost surface;
the first main-surface-side outer layer portion and the second main-surface-side outer layer portion each include a protective structure made of metal that is located only at a position not overlapping the inner layer portion when the multilayer ceramic capacitor is seen from above, and the protective structures are included only in the first main-surface-side outer layer portion and the second main-surface-side outer layer portion;
each of the protective structures extends continuously along the length direction and is not in contact with the first end surface and the second end surface; and
each of the protective structures includes a first end and a second end, the first end is located at a position overlapping the first external electrode and the second end is located at a position overlapping the second external electrode when the multilayer ceramic capacitor is seen from above.