How & why are Conformal Coatings used in Electronics?
A conformal coating, silicone or acrylic, is normally applied as a thin layer across the surface of a PCB, covering all components and delicate wiring. Protecting PCBs in critical applications which are exposed to harsh environmental working conditions is essential if product failure is to be avoided.
For any coating to be effective it must maintain good adhesion to all the component substrates, be unaffected by changes in operational temperature and be resistant to any contaminants, such as moisture and chemicals. Its ability to flow around, under and over the components without leaving areas exposed to the atmosphere, especially on sharp edges, is also important.
Most conformal coatings are clear and many formulations have a UV indicator to enable easy visual quality control inspection under an ultra violet light source. Cure systems vary and include air drying, heat cured and UV cured.
CHT have a range of silicone and acrylic coatings which can be applied by spraying, dipping or brushing. Our silicone coatings include:
- 100% solids
- Room temperature cure
- High temperature resistance
- UV trace
|ACC11||Acrylic conformal coating||Meets requirements of MIL-I-46058C and IPC-CC-830|
|ACC15||Silicone Conformal Coating||Room temperature cure or mild heat acceleration at 60°C|
|ACC17||Silicone conformal coating||Fast room temperature cure|
|ACC34||Low viscosity fluid for thinning 1 part RTV's||Compatible with virtually all silicones|