COG dielectric composition for use with copper electrodes

Details COG dielectric composition for use with copper electrodes COG dielectric composition for use with copper electrodes

2007-01-09

2007-01-09

Thomas, Eric W. (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S321400, C501S139000, C156S089120

Reexamination Certificate

active

11235656

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 copper and copper 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 composite oxide formed by calcining rare earth titanates, barium titanate, together with other metal oxides such as MgO, CaO, ZnO, MnO2, ZrO2, SiO2, Ga2O3, Nd2O3, Nb2O5, and Y2O3.

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