Why does capillary flow or scavenging occur when I apply conformal coating to my PCB?

Capillary flow in conformal coating is where the coating pulls or runs away from certain areas of a PCB to more favourable sectors due to a combination of effects, leaving a patchy finish on the surface of the board.

To learn more click Common Failure Mechanisms in Conformal Coating Capillary to find out more.

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About Dr Lee Hitchens

Dr Hitchens has been working in the electronics industry and the area of conformal coatings for over 25 years in various areas including sales and technical support. He has also been training people for almost the same amount of time in all areas of conformal coating whether that is materials & equipment selection, process development or troubleshooting to help them solve their particular problem. Recently, he decided that the industry needed a specific place where all of the useful knowledge on conformal coatings could be collated for users to find easily and use in their own production process. So, Nexus was born and he began the Nexus eBook project.

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