Hermetically Sealed SMD Tantalum Capacitors

by: I.Zednickova, M.Biler, J.Petrzilek, T.Zednicek; AVX Corporation

The article presents improvement of stability parameters of tantalum surface mounted capacitors with manganese dioxide or conductive polymer cathode. Higher stability is achieved by placement of the capacitor into an SMD case filled by an inert atmosphere and hermetically sealed. The long term stability testing performed on such hermetically sealed capacitors has proven better stability of both studied types - manganese dioxide capacitor and conductive polymer capacitor. The safe working temperature of hermetically sealed capacitors is 230°C with manganese dioxide cathode and 175°C with polymer cathode... read article »

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