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Simple Steps to Resolve Conformal Coating Wetting Problems

Posted by Monika Dybalska on Dec 15, 2016 3:22:10 PM

Does your conformal coating not wet properly? Do you struggle with craters, fish-eyes, or film separation? The culprit could be that the surface energy of your PCB is lower than the surface tension of the conformal coating.   The above defects are discussed frequently with customers on our technical support line, and any time we receive a technical enquiry regarding poor wetting or loss of adhesion, we ask “what is the surface energy of your substrate?” In this blog, we will explain surface energy, surface tension, and how to quickly troubleshoot defects resulting from low surface energy.

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Topics: conformal coating, conformal coating application, Conformal Coating Troubleshooting

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