COG dielectric composition for use with nickel electrodes
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United States of America Patent
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Dec 28, 2010
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app pub date -
Sep 13, 2006
filing date -
Sep 13, 2006
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Abstract
Multilayer ceramic chip capacitors which satisfy COG requirements and which are compatible with reducing atmosphere sintering conditions so that non-noble metals such as nickel and nickel alloys thereof may be used for internal and external electrodes are made in accordance with the invention. The capacitors exhibit desirable dielectric properties (high capacitance, low dissipation factor, high insulation resistance), excellent performance on highly accelerated life testing, and very good resistance to dielectric breakdown. The dielectric layers comprise a strontium zirconate matrix doped with other metal oxides such as TiO.sub.2, MgO, B.sub.2O.sub.3, CaO, Al.sub.2O.sub.3, SiO.sub.2, and SrO in various combinations.
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