The Polyurethane (urethane) lacquer is part of the organic family of conformal coatings. The urethanes are normally used for providing chemical resistance to the circuit board. as well as providing good humidity & moisture protection, and generally higher dielectric properties.
De-wetting is where the conformal coating material refuses to wet the surface that it has been applied to evenly. Factors that influence de-wetting usually involve non-ionic contamination such as: Residues from board manufacture including silicone surfactants from solder resist &
Conformal coating can be applied using a brush to “paint” on the coating to the circuit board. The coating is applied selectively according the requirements of the circuit board. Areas not to be coated are avoided by the operator. The
Batch spraying is one of the widest used techniques used in low and medium volume conformal coating processing. Using a compressed air spray gun, the conformal coating is applied by spraying across the whole of the circuit board. It is
There are many types of defect that can occur during process of a circuit board. Using the IPC standards as a guideline they include defects such as Blistering Blushing Bubbles, Pinholes and foam Contamination of coating Capillary Corrosion Cracking Delamination
Acrylic conformal coatings are one of the most popular types of protective lacquers in the world. Their properties include having excellent humidity resistance and great particulate protection. They also offer extremely competitive pricing and easy ability to be applied. It