Conformal Coatings

Conformal coating is the process of spraying a dielectric material onto a device component to protect it from moisture, fungus, dust, corrosion, abrasion, and other environmental stresses. It provides environmental and mechanical protection to significantly extend the life of the components and circuitry. Commonly used conformal coatings include silicone, acrylic, urethane and epoxy. Conformal coatings are traditionally applied by dipping, spraying or simple flow coating, and increasingly by select coating or robotic dispensing.

Conformal coatings protect electronic printed circuit boards from moisture and contaminants, preventing short circuits and corrosion of conductors and solder joints. They also minimize dendritic growth and the electromigration of metal between conductors. In addition, the use of conformal coatings protects circuits and components from abrasion and solvents. Stress relief is also provided, as well as protection of the insulation resistance of the circuit board. And conformal coating enhances performance and allows greater component density due to increased dielectric strength between conductors.


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