Surface Modifiers are ultra thin nano coatings that are applied in the range of 0.1-2 microns in thickness.
Traditional liquid conformal coatings are applied in the range of 25-75um so they are considerably thicker in nature.
How do nano coatings work?
The nano coatings do a different job to the liquid coatings.
What they do is effectively change the surface energy of the substrate they are applied to.
This change in surface energy makes it harder for liquids like water and oils to wet the surface and cause corrosion etc.
How are nano coatings applied?
The FC coatings can be dipped and sprayed.
In fact, most time NO MASKING is generally required for the nano coatings if the film thickness is lower than a few microns. This is due to the coating have very low strength. So, the coating in the connectors doesn’t stop the connection of the male and female parts.
So, the material is held in a dip tank of some description, the substrate is immersed quickly into the liquid, withdrawn from the tank, and the coating dries extremely quickly, leaving the board coated. It is a very simple process.
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