What are the tips for cleaning PCBA circuit boards?
PCBA circuit boards are used more in China, in the printed circuit board production process will occur contaminants, including flux and adhesive residues and other production process dust and debris and other contaminants. If the pcb board is not useful to ensure a clean appearance, the resistance and leakage will lead to PCBA circuit board failure, thus affecting the life of the product. Therefore, cleaning the PCBA circuit board is an important step in the production process.
Semi-aqueous cleaning mainly using organic solvents and deionized water, plus a certain amount of active agents, additives composed of cleaning agents. This cleaning between solvent cleaning and water cleaning. These cleaners are organic solvents, flammable solvents, high flash point, low toxicity, safe to use, but must be flushed with water, and then dried.
Water purification skills is the future direction of the development of cleaning skills, the establishment of pure water sources and discharge water treatment plant is necessary. Water as a cleaning medium, adding appearance active agent, additives, corrosion inhibitors and chelating agents in water, constituting a series of water-based cleaning agents. Capable of removing aqueous solvents and non-polar contaminants.
Used in the welding process without cleaning flux or without cleaning solder paste, welding directly into the next process of cleaning, no longer free cleaning skills are currently most commonly used as a substitute for skills, especially mobile communication products are basically a one-time use of the method to replace the ODS. solvent cleaning is mainly used for solvent solubilization to remove pollutants. Solvent cleaning due to its fast evaporation, solubility and other characteristics, the requirements of the equipment is simple.
The above four cleaning skills can achieve a certain cleaning effect, but how to quickly and usefully clean the pcb board? The application of ultrasonic cleaning machine can be solved. It uses ultra-high frequency in the liquid medium into the role of kinetic energy, cavitation effect occurs, constituting a myriad of tiny bubbles, and then hit the object appearance, so that the appearance of dirt off, so as to achieve the role of cleaning. Because it is through the liquid, as long as the liquid can contact the appearance of the appearance can be cleaned in place, leaving no dead ends.
It is able to work on every appearance of multiple objects at the same time. It is very useful and fast, being able to clean in about 15 minutes. One advantage of using ultrasonic cleaning is that it can be useful for restoration, advancing pads and components, and cutting down on electromagnetic interference.
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