Why ultra thin nano coatings can offer protection to circuit boards like a conformal coating

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.

water repelled from a connector due to FC coating square crop
Water repelled from a connector due to an ultra thin fluoropolymer (FC) coating

 

Circuit board dual coated in CC and FC
A circuit board coated with conformal coating on the left and a nano coating on the right. The water wets the circuit board differently as the nano coating is hydrophobic.

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So, the material is held in a dip tank of some description, the substrate is immersed quickly into the liquid, withdrawn from the tank, and the coating dries extremely quickly, leaving the board coated.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.

Want to know more about nano coatings from SCH?

Contact us now to find out more about our new range of nano coatings.

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Give us a call at (+91) 40 65 897 899 or email your inquiries at salesindia@schservices.com.

 Why ultra thin nano coatings can offer protection to circuit boards like a conformal coating

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