PCB circuit boards are widely used in China, and pollutants will be generated during the manufacturing process of printed circuit boards, including dust and debris in the manufacturing process such as residues of flux and adhesives. If the pcb board cannot effectively guarantee the clean surface, the resistance and leakage will cause the pcb board to fail, thus affecting the service life of the product. Therefore, cleaning the pcb circuit board during the manufacturing process is an important step.
Semi-aqueous cleaning mainly uses organic solvents and deionized water, plus a certain amount of active agents and additives. This cleaning is between solvent cleaning and water cleaning. These cleaners are organic solvents, flammable solvents, high flash point, low toxicity, and safe to use, but must be rinsed with water and then air-dried.
Water purification technology is the development direction of future clean technology, and it is necessary to establish pure water source and discharge water treatment workshop. Using water as the cleaning medium, adding surfactants, additives, corrosion inhibitors and chelating agents to water to form a series of water-based cleaning agents. Aqueous solvents and non-polar contaminants can be removed.
It is used in the soldering process without cleaning flux or solder paste. After soldering, it goes directly to the next process for cleaning, no longer free cleaning technology is currently the most commonly used alternative technology, especially mobile communication products are basically one-time use method to replace ODS. Solvent cleaning is mainly used for solvent dissolution to remove contaminants. Solvent cleaning requires simple equipment due to its fast volatilization and strong solubility.
Post time: May-18-2022