PCB Conformal Coating

PCB conformal coating is a thin protective layer applied to printed circuit boards to shield them from environmental factors. This coating, typically 25-250 micrometers thick, protects against moisture, dust, chemicals, and temperature extremes. Common materials include acrylics, silicones, urethanes, and epoxies, each offering unique properties. The coating process can involve dipping, spraying, or brushing, with some advanced methods using robotic systems for precision. Conformal coating enhances PCB reliability, especially in harsh environments like automotive, aerospace, and medical applications. It also prevents electrical leakage and corrosion, extending the PCB’s lifespan. However, proper application is crucial, as improper coating can lead to issues like trapped contaminants or component stress.