In actual production, the cleaning effect of Solder Paste is directly related to the reliability of circuit boards, and selecting a suitable cleaning agent is one of the key factors. Isopropanol or chemical cleaning agents specially designed for solder paste formulations are usually used, as these solvents can effectively dissolve the rosin and Flux components in the solder paste.

During the cleaning process, physical methods need to be combined, such as ultrasonic cleaning equipment, which accelerates solvent penetration through high-frequency vibration, making residues easier to remove while avoiding damage to solder joints caused by mechanical friction. An ultrasonic frequency of around 40kHz is generally considered appropriate.

During operation, attention must also be paid to the concentration and temperature of the cleaning solution, as both excessively high and low values will affect cleaning efficiency. For example, high temperatures accelerate solvent evaporation, leading to insufficient cleaning, while low temperatures may reduce solvent activity, making it impossible to completely remove residues. Therefore, adjustments need to be made according to specific process conditions.

After cleaning, sufficient drying treatment must be carried out to prevent moisture residue from causing subsequent soldering defects. Methods such as hot air circulation or vacuum drying ovens can be used to ensure that the workpiece surface is completely dry.

For different types of solder paste, their compositions vary greatly, and the cleaning plan also needs to be adjusted accordingly. For example, solder paste containing water-based flux may require stronger polar solvents, while halogen-free solder paste needs to avoid chlorine-containing solvents to prevent corrosion of metal surfaces.

In practical applications, it is recommended to first conduct small-batch tests to confirm the compatibility of the cleaning agent and process parameters, and then gradually expand to mass production to reduce the risk of rework caused by improper cleaning.

Finally, the treatment of waste liquid during the cleaning process must also comply with environmental protection requirements to avoid environmental pollution. At the same time, the cleaning solution should be replaced regularly to maintain its effectiveness and ensure that the cleaning quality is always within a controllable range.