A conformal coating is a thin polymeric film which conforms to the contours of a printed circuit board to secure the board's parts. Conformal coatings are a defensive, non-conductive dielectric layer that is added to a circuit board or electronic device. Typically applied at 25-250µm it covers and protects solder joints, the leads of electronic components, uncovered traces, and other metallized areas from corrosion, in the end, operating environment, ultimately extending the working life of the PCB.
When Should I Use Conformal Coating?
Conformal coating is extremely thin, making it an excellent choice for some circuit boards and devices, particularly those with strict weight or thickness restrictions.
Circuit boards in cell phones, for instance, are often put in amazingly little spaces. In situations like these, a conformal coating is a perfect option.
How do conformal coatings work?
A conformal coating is a defensive boundary that shields sensitive electronic parts against cruel natural conditions, for example dampness, chemicals, and debris. They are not designed to be a total sealant. Conformal coatings are a breathable protective layer that will protect against the particular environment requirement yet will likewise permit any dampness caught in the circuit board get away.
The particular advantages of conformal coatings can be summarized as follows:
1.Insulating properties allow a reduction in PCB conductor spacing of more than 80%.
2.Completely protect the assembly against chemical and corrosive attack.
3.Eliminate potential performance degradation due to environmental hazards.
Finally, conformal coating allows protection without significant additions to the weight or thickness of the device.