Is it advisable to clean my boards before your conformal coating application process?

Whether to clean a PCB before coating is a difficult question to answer simply. However, the best advice is if the product is safety critical and you have not tested the product for long term reliability it may be worth cleaning!

The problem lies in not knowing what contaminants are on the surface of the board before coating. These contaminants could be from a variety of sources including the bare board manufacture, the solder resist used and whether it is compatible with the coating, the assembly processes including fluxing and the handling process.

Determining if the board contaminants are relatively benign is possible using techniques like Surface Insulation Resistance (SIR) testing? However, it can be complex and could be quite costly depending on the level of investigation. This cost however needs to weighed against the potential costs of returns, reputation and consequential losses if it

If you would like to know more about cleaning before coating or other products and services offered and supported by SCH Technologies, please do not hesitate to contact us

Telephone: +44 1226 249019

Email: sales@schservices.com

Click Contact Us to send us your requests.

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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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