Certonal® Electronics Grade Coatings
Fluoropolymer Coatings, sometimes referred to as nano-coatings, effectively change the surface energy of the substrate they are applied to, so contamination from environmental contaminants, such as moisture, sulphur, pollution and grime is repelled from the surface.
The coatings are preferably applied via a dip coating system, resulting in the component surfaces being fully coated, unlike spray applications which tend to cover only the tops and side of the components. Once applied, the coating will dry to a thin transparent film, which has excellent hydrophobic and oleophobic properties. This differentiates fluoropolymer coatings from conformal coating i.e. acrylics or polyurethanes, which are not water repellent.
The coating is applied at <1-2um, dries in seconds, requires little or no masking and is removable and repairable. Cost reductions are achieved because of time savings in the processing of the printed circuit board.
The below picture demonstrates how a droplet of water reacts to an uncoated and coated surface. The contact angle of the water droplet on the coated surface is greatly reduced, allowing the water droplets to bead up and drain freely from the surface.
