Monolithic ceramic capacitor

A capacitor body includes a capacitance-forming section including an alternately arranged plurality of internal electrodes and plurality of dielectric ceramic layers and outer layer sections disposed on the upper or lower face of the capacitance-forming section ( 28 ). The outer layer sections inclu...

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Bibliographische Detailangaben
Hauptverfasser: NAKANO MAKITO, SAITO AKIRA
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A capacitor body includes a capacitance-forming section including an alternately arranged plurality of internal electrodes and plurality of dielectric ceramic layers and outer layer sections disposed on the upper or lower face of the capacitance-forming section ( 28 ). The outer layer sections include an outermost layer and a second layer ( 31 ) inwardly located therefrom. The second layer has a thermal expansion coefficient greater than that of the outermost layer by 1x10-6/° C. to 3x10-6/° C. The outermost layer has a thickness of 50 to 80 mum. The second layer has a thickness of 20 to 50 mum. The arrangement prevents cracks from being formed in a monolithic ceramic capacitor when external electrodes are formed by baking and cooling, and cracks caused by fatigue failure due to low-stress cycles such as heat cycles are prevented from reaching internal electrodes.