The use of waterproof and moisture-proof coating on PCBA circuit boards
Hits:1 Add Date:2020/5/27
The PCBA circuit board has a wide range of optical properties. The coating of nanometer material can improve the corrosion resistance of the substrate and achieve the purpose of surface modification and decoration. Adding nanoparticles to the coating or coating can further improve its protection ability, and can withstand the atmosphere and ultraviolet radiation, so as to achieve anti-degradation, anti-discoloration and other effects; In addition, it can also be used in building materials such as sanitary ware, indoor space, utensils and other nano-material coating, used to produce sterilization and cleaning effect.
Among them, PCBA circuit board has waterproof, moistureproof, corrosion resistance and other characteristics. After all, the relatively weak part of electronics is PCBA. Once the vapor or corrosive fluid penetrates the PCBA, it can cause short circuit or corrosion of component pins, resulting in the production of electronic products. The function of PCBA is affected or even damaged. PCBA's waterproof, moisture-proof and anticorrosion methods are usually from the outside to the inside of the structure protection + potted protection + PCBA functional coating protection.
PCBA nano moisture proof coating
Board nano waterproof and moisture-proof coating is a new type of nano material, also known as nano coating. It is an ideal substitute for the present three anti - paint. The thickness is only 2-4 microns, invisible to the naked eye, forming a pole on the surface of the PCB. Thin net effectively reduces the surface energy of printed circuit board, forming a lotus leaf effect, has good heat dissipation performance, does not affect the conductivity of normal connectors, and can be waterproof IPx5, basically meet the living waterproof standard, can also be corrosion resistant, acid and alkali resistant.
At present, the coating technology has been used in high-end sports headphones for sweat resistance. The nanometer coating is very simple to operate. Soak the circuit board directly in the nano waterproof solution for a few seconds, then take it out and let it dry for 5 minutes. Easy to maintain. Environmental protection standards.
In the process of coating waterproof, moistureproof and anticorrosion on PCBA, according to the characteristics of the material, it can be divided into three kinds of waterproof coating, spraying, dipping and brushing.
