Multilayer ceramic capacitor

A multilayer ceramic capacitor comprising:

• a multilayer body including a dielectric ceramic layer and an internal electrode layer stacked in a stacking direction;
• and
• an external electrode connected to the internal electrode layer;
• wherein
• the multilayer body includes a first main surface and a second main surface on opposite sides in the stacking direction, a first side surface and a second side surface on opposite sides in a width direction orthogonal or substantially orthogonal to the stacking direction, and a first end surface and a second end surface on opposite sides in a length direction orthogonal or substantially orthogonal to the stacking direction and the width direction;
• the internal electrode layer includes a first internal electrode layer that extends to the first end surface, and a second internal electrode layer that extends to the second end surface;
• the second internal electrode layer is opposed to the first internal electrode layer with the dielectric ceramic layer interposed therebetween;
• the external electrode includes a first external electrode that is disposed on the first end surface and is connected to the first internal electrode layer, and a second external electrode that is disposed on the second end surface and is connected to the second internal electrode layer;
• the dielectric ceramic layer includes first dielectric ceramic layers and a second dielectric ceramic layer;
• at least one of the first dielectric ceramic layers is disposed between the first internal electrode layer and the second internal electrode layer;
• the second dielectric ceramic layer includes a region between two of the first dielectric ceramic layers opposite to each other with the internal electrode layer interposed therebetween, and in which the internal electrode layer is not disposed, and such that a portion of the second dielectric ceramic layer overlaps the two first dielectric ceramic layers in the stacking direction;
• the multilayer body includes an inner layer portion in which the first internal electrode layer and the second internal electrode layer are alternately stacked with the dielectric ceramic layer interposed therebetween, an outer layer portion sandwiching the inner layer portion in the stacking direction and including a ceramic material, and a third dielectric ceramic layer sandwiching the inner layer portion and the outer layer portion in the width direction and including a dielectric ceramic material;
• a second alloy portion including one metal element provided in a greatest amount among metal elements of the internal electrode layer, and one or more metal elements among a metal group including Sn, In, Ga, Zn, Bi, Pb, Cu, Ag, Pd, Pt, Ph, Ir, Ru, Os, Fe, V, and Y is provided between the second dielectric ceramic layer and the first internal electrode layer, and between the second dielectric ceramic layer and the second internal electrode layer, respectively;
• and
• the external electrode includes Ni, and a fifth alloy portion in which one or more metal elements among the metal group is segregated in the Ni is provided.

A multilayer ceramic capacitor comprising:

• a multilayer body including a dielectric ceramic layer and an internal electrode layer stacked in a stacking direction;
• and
• an external electrode connected to the internal electrode layer;
• wherein
• the multilayer body includes a first main surface and a second main surface on opposite sides in the stacking direction, a first side surface and a second side surface on opposite sides in a width direction orthogonal or substantially orthogonal to the stacking direction, and a first end surface and a second end surface on opposite sides in a length direction orthogonal or substantially orthogonal to the stacking direction and the width direction;
• the internal electrode layer includes a first internal electrode layer that extends to the first end surface, and a second internal electrode layer that extends to the second end surface;
• the second internal electrode layer is opposed to the first internal electrode layer with the dielectric ceramic layer interposed therebetween;
• the external electrode includes a first external electrode that is disposed on the first end surface and is connected to the first internal electrode layer, and a second external electrode that is disposed on the second end surface and is connected to the second internal electrode layer;
• the dielectric ceramic layer includes first dielectric ceramic layers and a second dielectric ceramic layer;
• the first dielectric ceramic layers include Mg, and at least one of the first dielectric ceramic layers is disposed between the first internal electrode layer and the second internal electrode layer;
• the second dielectric ceramic layer includes Sn and a region between two of the first dielectric ceramic layers opposite to each other with the internal electrode layer interposed therebetween, and in which the internal electrode layer is not disposed, and such that a portion of the second dielectric ceramic layer overlaps the two first dielectric ceramic layers in the stacking direction;
• and
• the third dielectric ceramic layer includes at least one metal element selected from a group consisting of Mg, Mn, and Si.