Ionic Contamination
Ionic contamination refers to electrically conductive residues left on printed circuit boards after manufacturing processes such as soldering, handling, or chemical processing. These contaminants include salts, flux activators, and process chemicals that can dissolve in moisture and create conductive pathways.
Why it matters
Ionic contamination is one of the leading causes of electrochemical migration, dendritic growth, and leakage currents in electronic assemblies.
How cleaning solves the issue
Engineered cleaning chemistries dissolve and remove ionic residues from PCB surfaces and component packages. Proper rinsing ensures contaminants are completely removed rather than redistributed.
FAQ
Common methods include ROSE testing and ion chromatography.
Yes, particularly in humid environments.