Conformal Coating Facility Setup: General Requirements

If you are looking to apply conformal coatings in-house, there are several intricacies of the process can sometimes be overlooked.

• It’s crucial to maintain a clean, dust-free coating room, as even tiny particles can adhere to the drying coating on printed circuit boards.
• Controlling the temperature within reasonable limits is vital, as the coating’s viscosity is temperature-dependent.
• Humidity control is even more critical, with levels needing to be above 35% for ESD reasons and below 55% to prevent moisture-related issues that can compromise the coating’s integrity and application.

Given the solvents used in the spraying process, extraction is necessary. The necessary level of extraction will depend on regulations at the local, state, and federal levels. Thus, a comprehensive review of the relevant laws is crucial.