How do you define a conformal coating failure?

When I consider circuit board failures in the field, and they are due to the conformal coating, then I immediately think of two reasons for it occurring.

The first reason is that the wrong conformal coating material was selected.That is during the material specification the wrong material was chosen and it cannot protect the circuit regardless of how it is applied.

To address this issue then the design team should consider both the holistic approach to conformal coating and the design rules for conformal coating to ensure that the right material is selected.

The second reason is that the conformal coating was applied incorrectly. That is the right material is being used but the application process is failing.

This problem in the production line leads to conformal coating failures of the confomal coating that need to examined.

Both issues lead to the circuit failing but they are very different.

If further information on these topics and the key question you can go to our free eBook by clicking conformal coating process problems now.

If you are new to Nexus and our work on conformal coatings then a good place to go is our Start Here page.

Dr Lee Hitchens, Author of Nexus website and ebook
Dr Lee Hitchens, Author of Nexus

Dr Lee Hitchens is the author of the Nexus conformal coating website and eBook.

Send me an email at and let me know what you think?


Author: nexus3c

A global resource for the Conformal Coating industry providing information, solutions, connections and advice on all areas of Conformal Coating including Conformal Coating Service, Equipment, Materials, Training, Documentation and Consultancy.

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