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Analyze the tips for cleaning PCB

2021-1-4 10:29:00  

PCB board is widely used in China, and pollutants will be generated in the manufacturing process of printed circuit board, including the residue of flux and adhesive, such as dust and debris in the manufacturing process.If the PCB cannot be cleaned effectively, the resistance and leakage will lead to PCB circuit board failure, which will affect the service life of the product.Therefore, cleaning the PCB during the manufacturing process is an important step.


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Semi-water cleaning mainly uses organic solvent and deionized water, plus a certain amount of active agent, additive composition of cleaning agent.This kind of cleaning is between solvent cleaning and water cleaning.These cleaners are organic solvents, flammable solvents, high flash point, low toxicity, safe to use, but must be washed with water and then dried.


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Water purification technology is the development direction of clean technology in the future. It is necessary to establish pure water source and discharge water treatment workshop.With water as the cleaning medium, adding surfactants, auxilaries, corrosion inhibitors and chelating agents in water to form a series of water-based cleaning agents.Aqueous solvents and nonpolar contaminants can be removed.


In the welding process, there is no clean flux or solder paste, after welding directly into the next cleaning process, no longer free cleaning technology is the most commonly used alternative technology, especially mobile communication products are basically a disposable method to replace ODS.Solvent cleaning is mainly used for solvent dissolution to remove contaminants.Solvent cleaning due to its characteristics of fast volatilization and strong solubility requires simple equipment.


The above four cleaning techniques can achieve a certain cleaning effect, but how to quickly and effectively clean PCB board?The application of ultrasonic cleaning machine can be solved.It uses uHF to convert into kinetic energy in liquid medium to produce cavitation effect, forming countless tiny bubbles, and then hit the object surface, surface dirt off, so as to achieve the cleaning effect.Because it passes through the liquid, as long as the liquid can touch the surface of the surface can be cleaned in place, leaving no dead Angle.


It can work on every surface of multiple objects simultaneously.It is very effective and fast and can be cleaned for about 15 minutes.An advantage of ultrasonic cleaning is that it can effectively restore, improve the ability of pads and components, and reduce electromagnetic interference.