Murata Manufacturing Co., Ltd.

Atsushi Sano

Hiroshi Tamura

Mitsutoshi Kawamoto

Hiroaki Matoba

Tatsuya Ishikawa

Yoshihiro Fujita

Yuichi Kusano

Yasutomo Kobayashi

Yuki Kimura

A ceramic powder for use in a grain boundary insulated semiconductor ceramic that has an excellent ESD withstanding voltage, a semiconductor ceramic capacitor using the ceramic powder, and a manufacturing method therefor. The ceramic powder for use in a SrTiObased grain boundary insulated semiconductor ceramic has a specific surface area of 4.0 m/g or more and 8.0 m/g or less, and a cumulative 90% grain size D90 of 1.2 &#x3bc;m or less.

Ceramic powder, semiconductor ceramic capacitor, and method for manufacturing same

A dielectric ceramic composition having a high maximum relative dielectric constant, a superior temperature characteristic of capacitance and a high AC breakdown voltage, and a capacitor using the same are provided. The dielectric ceramic composition includes a polycrystalline solid solution which contains barium titanate as a primary component and which is represented by the formula (BaCa)(TiZr)Oin which 0&#x3c;x&#x2266;0.25 and 0&#x3c;y&#x2266;0.25 are satisfied. The dielectric ceramic composition also includes, with respect to 100 parts by weight of the primary component, a Y component in the form of YOin an amount in the range of more than zero to about 5 parts by weight; a Mg component in the form of MgO in an amount in the range of more than zero to about 2 parts by weight, and an Al component in the form of AlOin an amount in the range of more than zero to about 2.5 parts by weight.

Dielectric ceramic composition and capacitor using the same

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Nagaokakyo, Japan

Atsushi Sano