Conformal Coating
Electronics are used in more and more devices in today’s world. Conformal Coating may be necessary for your device depending on how and where it is used. Conformal Coating is a thin layer or film that protects PCBs and their components from damaging environments and corrosion. Some electronics require protection from moisture, temperature, salt, chemicals or other contaminants. If circuitry is left unprotected in some environments, it could fail.
The world of conformal coatings is rich and diverse, offering a wide array of types, each with unique strengths and weaknesses. This variety empowers you with the knowledge to make informed decisions about the best Coating for your specific needs.
When it comes to applying conformal Coating, the choice of method is not just about cost but also about the environmental conditions your product needs to withstand. This responsible and diligent approach ensures the best protection for your electronic devices.
Coating Type | Temperature Range | Solvent Resistance | Mechanical Strength | Electrical Resistance | Rework Difficulty |
|---|---|---|---|---|---|
Acrylic | Good | Poor | Good | Good | Easy |
Silicone | Very Good | Good | Good | Very Good | Difficult |
Epoxy | Good | Very Good | Very
Good | Good | Very Difficult |
Polyurethane | Good | Very Good | Very
Good | Very
Good | Difficult |
Fluropolymer (PTFE) | Very Good | Very Good | Very Good | Very Good | Very Difficult |
Parylene | Very Good | Very Good | Very Good | Very Good | Very Difficult |
Application Methods:
-
Dipping –This typically requires a large amount of taping and masking. The entire assembly is dipped into a container of Coating and then air-dried.
-
Brushing – A Coating is applied with a brush, typically in select areas.
-
Spray – Fastest method of application.
-
Vapour Deposition – The most expensive coating method requires specialized equipment.
