Multi-layer ceramic capacitor and method of producing the same

A method of producing a multi-layer ceramic capacitor, the multi-layer ceramic capacitor including a ceramic body and an external electrode, the ceramic body having a main surface facing in a first direction, a side surface facing in a second direction orthogonal to the first direction, an end surface facing in a third direction orthogonal to the first direction and the second direction, and a corner portion that connects the main surface, the side surface, and the end surface to one another, the external electrode covering the end surface and the corner portion of the ceramic body, the method comprising:

• cutting a multi-layer sheet produced by laminating ceramic sheets in the first direction, the ceramic sheets including internal electrodes, to produce a multi-layer chip including a capacitance forming unit that includes the internal electrodes laminated in the first direction, a cover that covers the capacitance forming unit in the first direction, and a cut surface that faces in the second direction, end portions of the internal electrodes being exposed from the cut surface;
• pressing and punching a ceramic sheet for forming a side margin in the second direction by the cut surface of the multi-layer chip, to form a side margin on the cut surface of the multi-layer chip;
• sintering the multi-layer chip on which the side margin is formed, to produce the ceramic body in which the corner portion has a surface roughness Ra of 30 nm or more;
• and
• immersing the end surface and the corner portion of the ceramic body into an electrically conductive paste, to form the external electrode.