Ferro Corporation

Willibrordus J L M J Coppens

Walter J Symes, Jr

Mike S H Chu

Knuth Albertsen

Mohammed H Megherhi

Elisabeth W J Römer

Gerhardus W Koebrugge

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, MgO, BO, CaO, AlO, SiO, and SrO in various combinations.

COG dieletric composition for use with nickel electrodes

COG dielectric composition for use with nickel electrodes

Multilayer ceramic chip capacitors which satisfy X8R 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 barium titanate base material doped with other metal oxides such as BaO, YO, ZrO, SiO, MgO, MnO, MoO, CaO, LuO, YbO, or WOin various combinations.

X8R dielectric composition for use with nickel electrodes

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WL Uden, Netherlands

Willibrordus J L M J Coppens