Dielectric ceramic composition, electronic device, and method for producing the same

An electronic device having a dielectric layer, wherein

• the dielectric layer is comprised of a dielectric ceramic composition, and
• the dielectric ceramic composition contains at least
• a main component containing a dielectric oxide of a composition expressed by {(Sr1−xCax)O}m.(Ti1−yZry)O2 and
• a fourth subcomponent containing an oxide of R (where R is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), wherein
• the symbols m, x, and y showing the molar ratio of the composition in the formula contained in the main component are in relations of
• 0.94<m<1.02,
• 0≦x≦1.00, and
• 0≦y≦0.20 and
• the ratio of the fourth subcomponent with respect to 100 moles of the main component, which is converted to the R in the oxide, is 0.02 mole≦fourth subcomponent<2 moles.

A method of producing an electronic device comprising the steps of

• preparing a dielectric paste using a dielectric ceramic composition comprising at least
• a main component containing a dielectric oxide of a composition expressed by {(Sr1−xCax)O}m.(Ti1−yZry)O2 and
• a fourth subcomponent containing an oxide of R (where R is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), wherein
• the symbols m, x, and y showing the molar ratio of the composition in the formula contained in the main component are in relations of
• 0.94<m<1.02,
• 0≦x≦1.00, and
• 0≦y≦0.20 and
• the ratio of the fourth subcomponent with respect to 100 moles of the main component, which is converted to the R in the oxide, is 0.02 mole≦fourth subcomponent<2 moles;
• preparing a paste for internal electrodes;
• alternately stacking the dielectric paste and the internal electrode paste to obtain a multilayer body;
• firing the multilayer body in an atmosphere of a partial oxygen pressure of 10−10 Pa to 10−3 Pa to obtain a sintered body;
• and
• heat treating the sintered body.

A method of producing an electronic device comprising the steps of

• preparing a dielectric paste using a dielectric ceramic composition comprising at least
• a main component containing a dielectric oxide of a composition expressed by {(Sr1−xCax)O}m.(Ti1−yZry)O2 and
• a fourth subcomponent containing an oxide of R (where R is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), wherein
• the symbols m, x, and y showing the molar ratio of the composition in the formula contained in the main component are in relations of
• 0.94<m<1.02,
• 0≦x≦1.00, and
• 0≦y≦0.20 and
• the ratio of the fourth subcomponent with respect to 100 moles of the main component, which is converted to the R in the oxide, is 0.02 mole≦fourth subcomponent<2 moles;
• preparing a paste for internal electrodes;
• alternately stacking the dielectric paste and the internal electrode paste to obtain a multilayer body;
• firing the multilayer body in an atmosphere to obtain a sintered body;
• and
• heat treating the sintered body in an atmosphere of an oxygen partial pressure of at least 10−4 Pa.