PCB Tech - PCB board adopts PCB three anti-paint and electric anti-glue

PCB board adopts PCB three anti-paint and electric anti-glue

Printed circuit boards {Printed circuit boards}, also known as printed circuit boards, are providers of electrical connections for electronic components.

Printed circuit boards are often represented by "PCB", but cannot be called "PCB boards".

1, patina phenomenon

patina is also called patina. The most common and destructive reason for the appearance of patina on PCB circuit boards is moisture. Therefore, if the PCB circuit board is kept in a humid environment for a long time, coupled with the action of oxygen and carbon dioxide, the copper on the PCB circuit board will have a chemical reaction to rust and produce patina, which will eventually cause the circuit board to fail to work properly. The solution is to use PCB three-proof paint or electric anti-glue.

2, leakage or short circuit phenomenon

Since no protective measures have been taken on the electrical circuit, after being piled with dust for a long time, because the dust is easy to absorb moisture, the damp dust will make the resistance smaller, resulting in local leakage of the wire, causing the control circuit to fail to work normally, if it is serious It even caught fire. Therefore, the method to avoid product leakage or short circuit is to use PCB three-proof paint or electric anti-glue.

3, the influence of fingerprints or sweat

Every aspect of PCB board manufacturing requires manual operations, so the risk of contamination is great, especially sweaty hands. The components of sweat fingerprints contain moisture, inorganic salts, fatty oils, and even cosmetics and skin care. These components remain in the components, component pins, solder wires, etc., plus the influence of the external environment, after a few months of use, the components of the circuit board will appear moldy, and the component pins will be corroded and broken. . To solve the hazards caused by fingerprints, PCB three-proof paint or electric anti-glue is still used.

Therefore, if the PCB board is not coated with three-proof paint or electric anti-glue, if it is returned to the market for processing, it will be repaired and reworked, or scrapped. The cost of losses will far exceed the cost of using three-proof paint. Therefore, it is very necessary to use PCB three-proof paint and electric anti-glue for PCB board.

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