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What are the tips for cleaning PCBA circuit boards?

date:2021-03-17 17:19:37

PCBA circuit boards are widely used in China. Pollutants will occur in the production process of printed circuit boards, including residues of flux and adhesives and other contaminants in the production process such as dust and debris. If the pcb board cannot effectively ensure a clean appearance, the resistance and leakage will cause the pcbA circuit board to fail, thereby affecting the service life of the product. Therefore, cleaning the pcbA circuit board is an important step in the manufacturing process.

PCBA cleaning

Semi-aqueous cleaning mainly chooses organic solvents and deionized water, plus a certain amount of active agent and a cleaning agent composed of additives. This 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.


Water purification skills are the development direction of future cleaning skills, and it is necessary to establish pure water sources and discharge water treatment workshops. Water is used as the cleaning medium, and surface active agents, auxiliary agents, corrosion inhibitors and chelating agents are added to the water to form a series of water-based cleaning agents. Able to remove water solvents and non-polar contaminants.


Used in the soldering process without clean flux or clean solder paste, after soldering directly into the next process for cleaning, no longer free cleaning skills are currently the most commonly used alternative skills, especially mobile communication products are basically one-time use Method to replace ODS. Solvent cleaning is mainly used for solvents to dissolve and remove contaminants. Solvent cleaning requires simple equipment due to its fast volatilization and strong solubility.


The above four cleaning skills can achieve a certain cleaning effect, but how to clean the pcb board quickly and effectively? The application of the ultrasonic cleaning machine can be solved. It uses ultra-high frequency to transform into kinetic energy in the liquid medium, causing a cavitation effect, forming countless small bubbles, and then hitting the surface of the object, causing the dirt on the surface to fall, thereby achieving the effect of cleaning. Because it passes through liquid, it can be cleaned in place as long as the liquid can touch the outer surface, leaving no dead corners.


It can work on every appearance of multiple objects at the same time. It is very useful and fast, able to clean in about 15 minutes. One of the advantages of using ultrasonic cleaning is that it can be usefully restored, improve the capabilities of pads and components, and reduce electromagnetic interference.

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