Tdk Corporation

Yuki Kamada

Satoshi Takagi

Dan Sakurai

Masayuki Tamura

Sanshiro Aman

A dielectric ceramic composition comprises a main component composed of at least one selected from BaTiO, (Ba, Ca)TiO, (Ba, Sr)TiOand (Ba, Ca, Sr)TiO, an oxide of rare earth element and a composite compound including Ba. 9 to 13 mol of the composite compound in terms of composite compound is included in the dielectric composition. The dielectric ceramic composition includes surface diffusion particles having surface diffusion structure composed of non diffusion phase and diffusion phase including rare earth element. In the surface diffusion particle, when an area of the non diffusion phase is defined as S1, an area of the diffusion phase is defined as S2, S1 and S2 satisfy a relation of S1:S2=20:80 to 30:70 (Note that, except S1=30 and S2=70), when an average concentration of the rare earth element in the surface diffusion particle is defined as C, S2 and C satisfy a relation of 4.8&#x2266;S2&#xd7;C&#x2266;5.8. By the present invention, dielectric ceramic composition which improves reliability with obtaining good specific permittivity and temperature characteristic and electronic component to which the dielectric ceramic composition is applied can be obtained.

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Tokyo, Japan

Yuki Kamada