Three anti-paint is also called PCB electronic circuit board protection oil, coated oil, moisture-proof paint, three anti-coating, waterproof glue, insulating paint, anti-corrosive paint, anti-salt spray paint, dust paint, protective paint, drape paint, three Anti-adhesive, etc., PCB board with three anti-paint has waterproof, moisture-proof, dust-proof "three-proof" performance and resistance to thermal shock, aging, radiation, salt spray, ozone corrosion, vibration and flexibility Good, strong adhesion and other properties.
Moisture is the most common and destructive factor for PCB boards. Excessive moisture greatly reduces the insulation resistance between the conductors, accelerates high-speed decomposition, lowers the Q value, and corrodes the conductor. We often see that the metal part of the PCB circuit board is made of patina or is not coated with three anti-paint metal copper and steam, oxygen and its chemical reaction.
Hundreds of contaminants found on printed circuit boards have the same destructive power. They can cause the same result as moisture erosion - electron decay, corrosion of conductors and even irreparable short circuits. The most common contaminants found in electrical systems may be chemicals left in the process. Examples of such contaminants include fluxing agents, solvent release agents, metal particles, and marking inks. There are also major pollution groups that are caused by accidental handling, such as body oils, fingerprints, cosmetics and food debris. There are also many pollutants in the operating environment, such as salt spray, sand, fuel, acid, and other corrosive vapors and molds.
Applying three anti-paint to printed circuit boards and components can reduce or eliminate electronic operating performance degradation when it is likely to be affected by adverse operating conditions. If the lacquer can maintain its effect for a satisfactory period of time, such as greater than the life of the product, it can be considered as having reached its purpose of coating.
Even if the coating is very thin, it can withstand mechanical vibration and vibration, thermal shock, and operation at high temperatures to a certain extent. Of course, the concept that the film can be used to impart mechanical strength or sufficient insulation to the individual parts inserted into the printed circuit board is a mistake. Components must be mechanically inserted and have their own suitable caulking agent, so that there is a double insurance to prevent accidents.
The Piezoelectric Ceramic sound-generating element, especially a lead-free piezoelectric ceramic sound-generating element, is mainly composed of metal flakes and piezoelectric ceramic flakes. The sound pressure generated by this new structure piezoelectric sounder is proportional to the number of piezoelectric ceramic sheets. By increasing the number of piezoelectric ceramic sheets, the required large sound pressure is easily achieved.
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