Patent ID: 7710712

Claim:
A multi-layer ceramic capacitor having substantially hexahedron multi-layer ceramics, internal electrodes formed in the multi-layer ceramics such that they are opposed to each other by way of the dielectric ceramics and led out alternately to different end faces, and end termination electrodes formed on both end faces of the multi-layer ceramics and connected electrically to the internal electrodes led out to the end faces respectively, in which the internal electrode is formed of Cu or a Cu alloy, the dielectric ceramics are a sintered body of a perovskite dielectric substance material mainly comprising BaTiO 3 constituted with grains with an average value for the diameter of 400 nm or less as viewed on the cross section and a grain boundary, and the grain is constituted with a dielectric substance having a domain pattern and a shell formed on the surface of the dielectric substance, wherein Cu is distributed in the dielectric ceramics put between the internal electrodes, wherein t/D is from 200 to 10% where D represents an average value for the diameter of the grains as viewed on the cross section and t represents the average value for the thickness of the shells.