Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Reexamination Certificate
2005-08-30
2005-08-30
Group, Karl (Department: 1755)
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
C361S321400
Reexamination Certificate
active
06936558
ABSTRACT:
A low temperature sinterable dielectric ceramic composition, as well as a multilayer ceramic chip capacitor and a ceramic electronic device. The dielectric ceramic composition comprises a major composition represented by the general formula: x{αBaO, (1−α)SrO}-y{SiO2}-z{(1−β)ZrO2, β Al2O3} (wherein x, y and z are weight percentages; x+y+z=100, 55≦x≦75, 10≦y≦35, and 5≦z≦30, α and β are moles; 0.4≦α≦0.8, and 0.01≦β≦0.07) and 2 to 10 parts by weight of a Zn—B-silicate glass composition, per 100 parts by weight of the major composition. The multilayer ceramic chip capacitor and a multilayer ceramic circuit board for the electronic device comprise a plurality of dielectric ceramic layers, internal electrodes arrayed inside the dielectric ceramic layers, and outer electrodes electrically connected to the internal electrodes, characterized in that the dielectric ceramic layer is a sintered body of the dielectric ceramic composition mentioned above, and the internal electrode is made of a conductive base metal material.
REFERENCES:
patent: 4816429 (1989-03-01), Nishioka et al.
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patent: 5756408 (1998-05-01), Terashi et al.
patent: 2000-143332 (2000-05-01), None
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Abstract—Japanese Patent No. JP5190020, Published Jul. 30, 2003.
Abstract—Japanese Patent No. JP1102806, Published Apr. 20, 1989.
Choi Soon Mok
Kang Sung Hyung
Kim Jong Hee
Seo Dong Hwan
Youn Hyuk Joon
Group Karl
Lowe Hauptman & Berner LLP
Samsung Electro-Mechanics Co. Ltd.
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