NEW Conformal Coating Masking Technical Bulletin Available to Download
In conformal coating many components and printed circuit board locations must remain uncoated due to the insulating nature of the coating. The purpose of the conformal coating masking materials is to prevent migration of the conformal coatings into components that need to be clear and designated keep out areas. This applies to both liquid conformal coating and Parylene processing.
Get this basic process wrong and it can be a big problem, leading to the next stage of either repairing the conformal coating leak, stripping the conformal coating off the circuit board, removing a component to replace it or scrapping the board.
Understand the fundamentals of conformal coating masking, what different materials are available, the problems associated with these masking products and how to get the best out of your process.