Cleaning the PCB board
date：2019-01-16 10:48:00
Cleaning the PCB board
PCB boards are used in China, and contaminants such as dust and debris in the manufacturing process, such as flux and adhesive residues, are generated during the pcb manufacturing process of printed circuit boards. If the pcb board does not effectively clean the surface, resistance and leakage can cause the pcb board to fail, which can affect the life of the product. Therefore, cleaning the pcb board during the manufacturing process is an important step.
The semi-aqueous cleaning mainly uses an organic solvent and deionized water, and a certain amount of a cleaning agent composed of an active agent and an additive. 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 rinsed with water and then allowed to dry.
Water purification technology is the development direction of clean pcb board technology in the future. It is necessary to establish a pure water source and a discharge water treatment workshop. Using water as a cleaning medium, surfactants, auxiliaries, corrosion inhibitors and chelating agents are added to the water to form a series of water-based cleaning agents. Water solvents and non-polar contaminants can be removed.
Used in the pcb board welding process, there is no cleaning flux or no cleaning solder paste. After welding, it goes directly to the next process cleaning. No longer free cleaning pcb board technology is the most commonly used alternative technology, especially mobile communication products are basically one-time use. The way to replace ODS. Solvent cleaning is mainly used for solvent dissolution to remove contaminants. Solvent cleaning requires simple equipment due to its fast evaporation and high solubility.
The above four pcb board cleaning techniques can achieve a certain cleaning effect, but how to clean the pcb board quickly and effectively? The application of ultrasonic cleaners can be solved. It utilizes the action of UHF in the liquid medium to convert into kinetic energy, which produces cavitation effect, forms numerous innumerable tiny bubbles, and then strikes the surface of the object, causing the surface dirt to fall off, thereby achieving the cleaning effect. Because it passes through the liquid, as long as the liquid can touch the surface of the surface, it can be cleaned in place without leaving a dead angle.
It can work on every surface of multiple pcb board objects at the same time. It is very effective and fast and can be cleaned for about 15 minutes. One advantage of using ultrasonic cleaning is that it can be effectively reduced, improve the ability of pads and components, and reduce electromagnetic interference.
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