Multilayer ceramic capacitor

A multilayer ceramic capacitor comprising:

• a laminate including a plurality of dielectric layers and a plurality of internal electrode layers that are alternately laminated in a height direction, and including a first principal surface and a second principal surface that are opposite to each other in the height direction, a first side surface and a second side surface that are opposite to each other in a width direction orthogonal or substantially orthogonal to the height direction, and a first end surface and a second end surface that are opposite to each other in a length direction orthogonal or substantially orthogonal to both the height direction and the width direction;
• a first external electrode that covers the first end surface;
• and
• a second external electrode that covers the second end surface;
• wherein
• the plurality of internal electrode layers include 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;
• the first external electrode includes a first base electrode layer on a side of the laminate and a first plating film on the first base electrode layer;
• the second external electrode includes a second base electrode layer on a side of the laminate and a second plating film on the second base electrode layer;
• each of the plurality of first internal electrode layers and the first base electrode layer are connected through a first alloy layer including a metal from which each of the plurality of first internal electrode layers is made and a metal from which the first base electrode layer is made;
• each of the plurality of second internal electrode layers and the second base electrode layer are connected through a second alloy layer including a metal from which each of the plurality of second internal electrode layers is made and a metal from which the second base electrode layer is made;
• the first alloy layer continuously covers the first end surface in a portion exposing the plurality of first internal electrode layers in a direction parallel or substantially parallel to an in-plane direction of the first end surface;
• the second alloy layer continuously covers the second end surface in a portion exposing the plurality of second internal electrode layers in a direction parallel or substantially parallel to an in-plane direction of the second end surface;
• a plane parallel or substantially parallel to both of the height direction and the length direction and including a center portion of the laminate in the width direction is a first plane;
• a plane parallel or substantially parallel to both the width direction and the length direction and including a center portion of the laminate in the height direction is a second plane;
• a ridge of the laminate in a portion connecting between the first end surface and the first principal surface is a first ridge;
• a ridge of the laminate in a portion connecting between the first end surface and the second principal surface is a second ridge;
• a ridge of the laminate in a portion connecting between the first end surface and the first side surface is a third ridge;
• a ridge of the laminate in a portion connecting between the first end surface and the second side surface is a fourth ridge;
• a ridge of the laminate in a portion connecting between the second end surface and the first principal surface is a fifth ridge;
• a ridge of the laminate in a portion connecting between the second end surface and the second principal surface is a sixth ridge;
• a ridge of the laminate in a portion connecting between the second end surface and the first side surface is a seventh ridge;
• and
• a ridge of the laminate in a portion connecting between the second end surface and the second side surface is an eighth ridge;
• a curvature radius R1 of the first ridge on the first plane, a curvature radius R2 of the second ridge on the first plane, a curvature radius R3 of the third ridge on the second plane, and a curvature radius R4 of the fourth ridge on the second plane are all about 5.4 μm or more and about 10 μm or less;
• a curvature radius R5 of the fifth ridge on the first plane, a curvature radius R6 of the sixth ridge on the first plane, a curvature radius R7 of the seventh ridge on the second plane, and a curvature radius R8 of the eighth ridge on the second plane are all about 5.4 μm or more and about 10 μm or less;
• the first external electrode extends from the first end surface to portions of the first principal surface, the second principal surface, the first side surface, and the second side surface toward the first end surface so as to cover the first ridge, the second ridge, the third ridge, and the fourth ridge;
• and
• the second external electrode extends from the second end surface to portions of the first principal surface, the second principal surface, the first side surface, and the second side surface toward the second end surface so as to cover the fifth ridge, the sixth ridge, the seventh ridge, and the eighth ridge.