Over the past years, multi-layer ceramic capacitors have undergone significant improvements. The volumetric density has increased several folds. This unfortunately resulted in a big increase in DC and AC bias sensitivity for many parts.
MLCC capacitors are dominating today’s capacitor market enabling high grade of electronics miniaturization. The continuous downsizing and use of higher and higher dielectric constant materials for MLCC class II capacitors has however resulted in worsening of some electrical parameters stability such as capacitance drop at operating conditions.
BGA device assembled to a PCB has been submitted to the ECSS verification programme following the guideline defined in the ECSS standard ECSS-Q-ST-70-38C. Metallographic analysis allows us to check the status of such devices after performing the environmental tests (Vibration & Thermal Cycling).