Failure Analysis of 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
Multi-Layer Chip Capacitors (MLCCs)
Knit line failure.
Fused Ni and BaTiO3.
Failed Ta Capacitor.
Alloyed Ta and Mn.
Aluminum Electrolytic Capacitors
Foil and lead attachments.
FTIR analysis of electrolyte.
Secondary Electron SEM image of the end of a film capacitor roll.