A conformal coating is a polymeric film that manufacturers coat onto a printed circuit board (PCB) in a thin layer to safeguard the board and its components from corrosion and harsh environmental conditions. Manufacturers generally apply conformal coatings in the 25-250µm range to minimize corrosion degradation in metalized regions of the PCB, such as solder joints, electronic component leads, and exposed traces. The film increases the life span of the PCB by adhering to the layout of the board and its parts. While these coatings are lightweight, they retain and increase a product’s dependability, offering reliable performance and larger gradients of voltage without taking up much space in a component.
In addition to providing overall system protection from abrasion or vibration, coatings for electrical parts defend against failure resulting from temperature extremes or fluctuations, moisture and humidity, dielectric concerns, and contaminants like dust, vapor, or fungi. This additional protection is essential to ensure optimum performance over time as advanced electronic components are exposed to harmful conditions.
Choosing the right material for an application allows the proper coating to reduce the influence of electrical impulses on the circuit and increase its efficiency in specific environments. At Robert McKeown Company, Inc., our team is here to help you find the right conformal coating for your application in this guide of common types and coating and curing methods.