The pervasiveness of electronics in every manufacturing industry has provided unique challenges. Manufacturers are tasked with protecting these componentsin environments that make electronics vulnerable to even minute amounts of moisture, debris and environmental contamination.
A useful solution to this problem is conformal coating. Conformal coating is a thin (usually 25-75µm thick) chemical or polymer film (parylene and acrylic are popularly used, depending on the application) that covers an electronic component to act as a barrier against contamination and a defense against moisture. While, this capability massively enhances the protection of, and therefore the reliability of, electronics, manufacturers have been overlooking a key element to dependability in this system: surface condition.
Image to left: A populated printed circuit board before a conformal coating has been applied.
Here are four major factors that could lead to poor adhesion which manufacturers are often unaware of the impact they have:
In order to ensure that none of these factors slips under your radar you need a way to monitor and measure the surface state and the effect of each protective layer. You need to know when, where and how to evaluate the readiness of a surface for adhesion. It comes down to rethinking the entire approach to adhesion.
Image to right: A printed circuit board close up showing the green solder mask and components attached to solder pads.
To learn more about how to manage your adhesion process and ensure your coatings are free from failure, download our eBook: Manufacturer’s Roadmap to Eliminating Adhesion Issues in Production.