Patent ID: 7696118

Claim:
A production method of a dielectric ceramic composition comprising a main component including barium titanate expressed by a composition formula of Ba m TiO 2+m , wherein “m” satisfies 0.990<m<1.010, a fourth subcomponent including an oxide of R, wherein R is at least one selected from the group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and other subcomponent including at least BaO; comprising steps of: preparing a post-reaction material by bringing a material of said main component to react with a part of a material of said fourth subcomponent to be included in said dielectric ceramic composition in advance of a step of firing; obtaining a material of said dielectric ceramic composition by adding rest of the material of said fourth subcomponent to be included in said dielectric ceramic composition into said post-reaction material; and firing said material of said dielectric ceramic composition, wherein an amount of BaO included in said other subcomponent is n mole with respect to 100 moles of said main component and said main component and said BaO are expressed by a composition formula of Ba m+n/100 TiO 2+m+n/100 , wherein “m” and “n” satisfy 0.994<m+n/100<1.014, and wherein in said step for preparing the post-reaction material, a content of said fourth subcomponent to be brought to react with the material of said main component is 0.01 mole to 0.2 mole with respect to 100 moles of said main component in terms of R.