Why use a Conformal Coating?
Due to the decrease in size of PCBs and the increased packing density, there is increase in the chance of shorts, corrosion, dendrite growth and electro migration. Conformal coating a PCB can improve the long term reliability of an assembly through careful application. Conformal coatings are defined as thin polymeric films which “conform” to the surface of the printed circuit board (PCB) and components. The conformal coating acts as an insulator. It protects the electronic circuits from the environment including moisture ingress and contaminants such as airborne dust which could lead to corrosive effects and shorts, as well as providing mechanical strength for vibration and shock.
Related Questions
- What type of conformal coating should be used if the board has "press fit" connectors to be pushed through the conformal coating?
- How can the same conformal coating be qualified under two material types to the Mil-I-46058C specification (aka IPC-C-830 B)?
- How important is it to use the Correct Conformal Coating?
