The Importance of Clean Boards for Effective Conformal Coating
Conformal coating is an essential protective layer for circuit boards, offering defense against moisture, chemicals, and mechanical stress. This Ask Dr. Adam video emphasizes the importance of cleanliness in the coating process. While various application methods exist, including spray, dip, wipe, and vacuum vapor deposition, each is suited to different coating materials like Parylene and urethane. Dr. Adam explains the key to a reliable coating and covers how contaminants like flux residue, fingerprint oils, or even food particles can interfere with this bonding process.
He highlights that while minor adhesion issues might not immediately affect boards in controlled environments, they can lead to peeling and failure over time due to temperature fluctuations, humidity changes, and power cycles.