Patent ID: 8192851

Claim:
A dielectric ceramic composition comprising a main component including barium titanate, a first subcomponent including BaZrO 3 , a second subcomponent including an oxide of Mg, a third subcomponent including an oxide of “R”, wherein “R” is at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, a fourth subcomponent including an oxide of at least one element selected from Mn, Cr, Co and Fe, and a fifth subcomponent including an oxide of at least one element selected from Si, Al, Ge, B and Li, wherein said dielectric ceramic composition comprises a plurality of dielectric particles, and crystal grain boundaries between adjacent dielectric particles; at least a part of said plurality of dielectric particles comprises a surface diffusion structure comprised of a central layer, and a diffusion layer around said central layer in which said subcomponents are diffused; in the dielectric particle having said surface diffusion structure, in a direction starting from said crystal grain boundary to a boundary face between said diffusion layer and said central layer, when a concentration of said “R” in a proximity point to a boundary face positioned at a distance of 5% of particle size of said dielectric particle from the boundary face of said crystal grain boundary is defined as CR, and a maximum concentration of said “R” in said diffusion layer is defined as CRmax, CR and CRmax satisfy a relation of CRmax/CR>1; and a point showing the CRmax exists in said diffusion layer except for at the boundary face of said crystal grain boundary and at the boundary face between said diffusion layer and said central layer.