Multilayer ceramic capacitor including internal electrode layers including opposing portions and lead-out portions with different widths

A multilayer ceramic capacitor comprising:

• an element body portion including a first principal surface and a second principal surface opposite to each other in a thickness direction, a first side surface and a second side surface opposite to each other in a width direction, and a first end surface and a second end surface opposite to each other in a length direction, and a plurality of dielectric layers and a plurality of internal electrode layers laminated in the thickness direction;
• a first external electrode on the first end surface;
• and
• a second external electrode on the second end surface;
• wherein
• the plurality of internal electrode layers includes a plurality of first internal electrode layers connected to the first external electrode and a plurality of second internal electrode layers connected to the second external electrode;
• each of the plurality of first internal electrode layers includes a first opposing portion opposed to an adjacent second internal electrode layer of the plurality of second internal electrode layers in the thickness direction, and a first lead-out portion connecting the first opposing portion and the first external electrode;
• each of the plurality of second internal electrode layers includes a second opposing portion opposed to an adjacent first internal electrode layer of the plurality of first internal electrode layers in the thickness direction, and a second lead-out portion connecting the second opposing portion and the second external electrode;
• a width of the first opposing portion in the width direction is larger than a width of the first lead-out portion in the width direction;
• a width of the second opposing portion in the width direction is larger than a width of the second lead-out portion in the width direction;
• each of the first opposing portion, the first lead-out portion, the second opposing portion, and the second lead-out portion includes an end portion in the width direction;
• the end portion of each of the first opposing portion, the first lead-out portion, the second opposing portion, and the second lead-out portion includes at least one gap filled with at least one of the plurality of dielectric layers;
• a proportion of the at least one of the plurality of dielectric layers that fills the at least one gap of the first lead-out portion is greater than a proportion of the at least one of the plurality of dielectric layers that fills the at least one gap of the first opposing portion;
• a proportion of the at least one of the plurality of dielectric layers that fills the at least one gap of the second lead-out portion is greater than a proportion of the at least one of the plurality of dielectric layers that fills the at least one gap of the second opposing portion;
• each of the first external electrode and the second external electrode includes a Cu layer on the element body portion, a Ni plating layer on the Cu layer, and a Sn plating layer on the Ni plating layer;
• the Cu layer includes a first layer portion connected to a plurality of the first lead-out portions or a plurality of the second lead-out portions and a second layer portion covering the first layer portion;
• the first layer portion has a higher Cu content than the second layer portion and extends in the thickness direction;
• the second layer portion has a higher content of a glass than the first layer portion;
• the second layer portion has a larger surface area than the first layer portion;
• the Cu of the first layer portion of the first external electrode is continuous to connect the first lead-out portions adjacent to each other in the thickness direction;
• the Cu of the first layer portion of the second external electrode is continuous to connect the second lead-out portions adjacent to each other in the thickness direction;
• and
• in a cross section of the second layer portion extending through a central portion in the width direction and parallel or substantially parallel to the thickness direction and the length direction, the glass occupies about 25% or more of an area of the second layer portion.