About the project AHBSEM
Electronic assemblies are often coated with protective lacquers to protect them from harsh environmental conditions. However, cavities under components and in the form of bubbles in the protective coating layer cannot be completely prevented during production. In the subsequent process control, this leads to a general negative classification of the affected components and thus to increased rejects.
In order to investigate the effects of cavities and bubbles under components, these are initially generated on test substrates and real components as part of the project. The components are exposed to climatic stress and at the same time checked for failures by means of electrical wiring. Subsequently, the exposed samples are examined both in terms of surface analysis and microstructure. In addition, moisture diffusion through the paint into cavities is examined more closely using simulations.
The results of the research work will be translated into a scientifically sound risk assessment of the damage potential of cavities and bubbles in varnished electronic systems. This also results in a recommendation for action on electrochemical component reliability. The associated reduction in rejects, improvement in risk assessment and communication along the value chain will have an enormous economic leverage effect.