PCB maintenance begins with the storage environment, a step often overlooked but crucial for reliability. Bare or unused PCBs should be stored in a dry, temperature-controlled, low-dust environment to prevent prolonged exposure to air, moisture absorption, or oxidation. This is especially important for surface-treated boards without components; high humidity can cause slight oxidation of the solder pads, affecting subsequent soldering quality. It is generally recommended to use anti-static bags for sealing, along with a desiccant, while avoiding direct sunlight and high temperatures to slow material aging.
During use and assembly, electrostatic discharge (ESD) protection is just as critical as mechanical protection. Precision components and traces on PCBs are highly sensitive to ESD. Operators must wear anti-static wrist straps, and workbenches must be grounded to prevent instantaneous ESD damage to chips or internal structures.
Daily maintenance focuses more on cleaning, moisture control, and temperature management. If a PCB operates in a high-temperature or high-humidity environment for extended periods, consider adding heat dissipation design or applying a conformal coating (moisture-proof, dust-proof, and corrosion-proof) to extend its lifespan.
