印刷电路板组装在使用清洗机清洗后,部分PCBA留有许多白色残渣,这些残渣由许多的化学物质反应而成。免清洗助焊剂、免清洗锡膏、电路板上的残留环氧树脂和其他树脂、元器件的材料和其他一些污染物都对这些复杂的化学反应有所贡献。讨论了印制板上残留物的形成原因和解决的方法。 Printed Circuit Board Assembly After cleaning with a washing machine, some of the PCBA leaves a lot of white residue, which is a reaction of many chemicals. No-clean flux, no-clean solder paste, residual epoxy and other resins on circuit boards, component materials, and other contaminants all contribute to these complex chemical reactions. Discusses the reasons for PCB residue formation and the solution.