source:Industry News release time:2023-06-19 Article author:yu Popular:pcb
First, there are copper layers on both sides of the PCB. In the production of PCB, whether it is used to create a copper layer in the use of addition or subtraction, it will eventually get a smooth and non -protective surface. Although the chemical properties of copper are not as good as the chemical properties of aluminum, iron and magnesium
Active, but pure copper is easily oxidized when contacting oxygen in the case of water;
Due to oxygen and water vapor in the air, pure copper will soon occur after contacting the air. Because the thickness of the copper layer in the PCB is very thin, the oxidized copper will become a bad conductive body, which will greatly damage the entire PCB
In order to prevent copper oxidation, the welding part of the PCB is separated from the non -welding part during the welding process, and the surface of the PCB is protected. The engineers invented a special coating. The coating can be easily coated on the PCB surface.
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