Environmental Failure Case Analysis of MLCC Capacitor
The full name of MLCC capacitor is Multi-layer Chip Ceramic Capacitor(Multi-layer Ceramic Capacitor,abbreviated as MLCC),which is made of ceramic dielectric film and inner electrode alternately stacked by layer by layer mismatch method,and then made into ceramic chip by one-time sintering at high temperature,and then finally made into capacitor by coating outer electrode slurry at the two ends of the ceramic chip.As a result,MLCCs have complex internal stresses and limited ability to withstand environmental stresses.In the actual complex use of the environment,MLCC will often be subjected to mechanical stress,electrical stress and temperature stress of the combined effect of the MLCC cracks or metal electrode misalignment and failure.In this paper,through the analysis of the typical failure cases of MLCC capacitors,we summarize the common reasons for the failure of MLCC,which is of some reference significance for the reliability design of PCBA under complex working conditions.
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