PCBA circuit boards undergo soldering processes such as reflow soldering, DIP wave soldering, and selective wave soldering in SMT electronic manufacturing processes. After soldering, PCB circuit boards and components inevitably have residues such as flux and solder paste. Excessive residues of solder paste, flux, and other substances on PCBA circuit boards can pose significant hazards. The term “no-clean” does not necessarily mean that there are few residues on the PCBA component board. Instead, it refers to the definition of residues according to standards, which can maintain the electrical performance reliability of PCBA component boards within a certain temperature, humidity, and time span in regular environments. The reliability of the electrical performance of PCBA component boards under normal working conditions is ensured according to the residues defined by standards in corresponding environmental temperature, humidity, and time intervals.
To further improve the cleanliness and appearance of PCBA component boards or enhance their reliability under higher technical requirements, many manufacturers use various cleaning methods to achieve PCB board cleanliness. The purpose of cleaning is ultimately to achieve surface cleanliness. Devices such as the Silman Tech PCBA cleaning machine DEZ-C758 or water-based PCBA cleaning equipment are commonly used for this purpose.
It is well understood in the industry that residues on PCBA circuit boards after soldering pose significant hazards. Depending on the type of product, PCBA circuit board cleaning must be performed. Most of the components in flux or solder paste residues contain resin, which can be easily dissolved or decomposed by cleaning agents, whether solvent-based or water-based. However, when these resin components are decomposed or dissolved, they reveal salts or other chemical substances present in the residues, leading to more serious contamination. Therefore, it is essential to choose high-quality PCBA cleaning equipment for cleaning purposes.