Conformal Coating is a key post-processing process for PCBA. It refers to forming a uniform and dense protective film on the surface of circuit boards and components through specific coating methods. Its core functions are moisture-proof, Salt spray-proof, and Mold-proof (three-proof), and it also has additional values such as enhancing insulation, impact resistance, and high-low temperature resistance. Its core role is to isolate the erosion of PCBA by harsh environments, reduce the risk of failures such as short circuits and corrosion, extend the service life of electronic equipment, and ensure the stable operation of products under complex working conditions.