In the early years, the domestic electronic industry developed rapidly. We used organic solvents to clean PCBA, such as alcohol, chlorofluorocarbons, triglycerides, mixed washing water and a small amount of ethanol (or isopropanol) to clean the residues of rosin flux, This kind of organic solvent has good dissolving ability to polar dirt, rosin flux and non-polar dirt, but it has been banned because of its destructive effect on ozone layer. Considering the requirements of environmental protection, non ODS (ozone depleting substances) cleaning process is being implemented all over the world, which can also be called environmental protection cleaning process, including:
Water based cleaning
