Failure Analysis of Capacitors

Multilayer Chip Capacitors (MLCCs), Tantalum Capacitors, Aluminum Electrolytic Capacitors, Film Capacitors

Below are failures seen in 4 types of capacitors: Multilayer Chip Capacitors or MLCCs, Tantalum Capacitors, Aluminum Electrolytic Capacitors, and Film Capacitors. The failure mechanisms unique to each device are shown in the figures.

More detail on failures in Film Capacitors can be found here.

 

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Other device failure analysis information:


Multilayer Chip Capacitor (MLCC)

Fused Ni and BaTiO3.

Fused Ni and BaTiO3.

Distorted electrodes.

Distorted electrodes.

Knit line failure.

Knit line failure.

Flexure crack in an MLCC.

Flexure crack in an MLCC.

Tantalum Capacitor

Breakdown site.

Breakdown site in a tantalum capacitor.

Failed Ta Capacitor.

Failed Ta Capacitor.

Ta205 thickness.

Ta205 thickness.

MnO2 deposit.

MnO2 deposit.

Aluminum electrolytic capacitor

Secondary Electron SEM image of the end of a film capacitor roll.

Secondary Electron SEM image of the end of a film capacitor roll.

Dissected capacitor.

Dissected capacitor.

FTIR analysis of electrolyte.

FTIR analysis of electrolyte.

Foil and lead attachments.

Foil and lead attachments.