Failure analysis of electroplating on sliver termination in multilayer ceramic capacitors (MLCCs)

DuPont1187 was frequently used as a palatable silver termination in the multilayer ceramic capacitor (MLCC). A phenomenon occurred on the palatable silver termination, which cladding material had poor connation with the sliver termination of MLCC and the failure of weld ability after aging. Base on different sintering conditions (different sintering temperature, bearing of sintering and stove environment), SEM and EDS were carried out on the microstructure and micro-area composition analysis. The failure mechanism was brought out, that was because the pollution of sulfur which was brought in by stove ash. And the corresponding improvement measures were brought forward.