The Importance of PCB Conformal Coatings in Electronic Products

Electronic products come in various types, offering consumers a wide array of choices. However, to stay competitive in the market, focusing on product quality is crucial. This is particularly important for electronic products, as they heavily rely on Printed Circuit Boards (PCBs).

Recently, more electronic manufacturers are realizing the significance of using conformal coatings, also known as “three anti-paints,” to protect PCBs, components, and printed circuits, ensuring their longevity.

Effects of Not Using Conformal Coatings:

• Patina Formation: Patina, or tarnish, is a common issue on PCB surfaces caused by moisture, oxygen, and carbon dioxide. Without protection, copper on the PCB can oxidize, leading to patina formation that may cause the PCB to fail. Applying conformal coatings can prevent this.
• Leakage or Short Circuit Phenomenon: Dust accumulation on unprotected circuits can mix with moisture, causing local leakage and abnormal behavior in the circuit. This can lead to unexpected shutdowns or heat generation. To avoid this, using PCB conformal coatings is essential.
• Fingerprints or Sweat Contamination: Contamination from manual operations during PCB manufacturing, such as sweat, can lead to corrosion and damage to components over time. Cleaning the board’s surface and applying conformal coatings are vital to prevent such issues.

By neglecting the application of conformal coatings and electrical anti-adhesive solutions on PCBs, manufacturers risk facing costly repairs or replacements due to environmental factors like high humidity, salt spray, or exposure to harsh chemicals.