Dielectric ceramic composite and electronic device

A technology of dielectric ceramics and compositions, applied in the field of electronic devices, can solve the problems of shortening the accelerated life of insulation resistance, easy reduction of DC bias reliability, and increased dielectric loss, etc.
CN1432548AInactive Publication Date: 2003-07-30TDK CORPARATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TDK CORPARATION
Publication Date
2003-07-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

A dielectric ceramic composition, comprising a main component including barium titanate, a fourth subcomponent including an oxide of R1 (note that R1 is at least one kind selected from a first element group composed of rare-earth elements having a effective ionic radius of less than 108pm when having a coordination number of nine), and a fifth subcomponent including an oxide of R2 (note that R2 is at least one kind selected from a second element group composed of rare-earth elements having a effective ionic radius of 108pm to 113pm when having a coordination number of nine). According to the composition, a dielectric ceramic composition having excellent reducing resisting property at firing, excellent temperature. dependence of capacitance after firing, and improved accelerated lifetime of insulation resistance can be provided.
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Description

technical field

[0001] The present invention relates to a dielectric ceramic composition used, for example, as a dielectric layer of a multilayer ceramic capacitor, and an electronic device using the dielectric ceramic composition as a dielectric layer. Background technique

[0002] Produced as Multilayer ceramic capacitors are examples of electronic devices. The internal electrode layer of the multilayer ceramic capacitor is integrated with the ceramic dielectric by firing, so it is necessary to select a material that does not react with the ceramic dielectric. Therefore, platinum, palladium and other noble metals have conventionally been inevitably used as materials constituting the internal electrode layers.

[0003] However, in recent years, dielectric ceramic compositions have been developed in which nickel and other inexpensive base metals can be used and extensive cost reductions have been achieved.

[0004] In recent years, as the density of electronic circuits ha...

Claims

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