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agitation or high-pressure sprays. However, aqueous cleaning requires thorough drying, which can be time-consuming and energy intensive. The equipment needed can also be larger and more complex, leading to higher upfront costs and space requirements. Solvent Vapor Degreasing: This method involves heating a solvent until it vaporises, then condensing the vapor on the cooler PCBA surface to dissolve and remove contaminants. Solvent vapor degreasing offers


THE RIGHT TOOLS VERY PROJECT


Vapour Degreasing: Solvent vapor degreasing offers energy-efficient cleaning and drying in one step, but requires careful solvent handling


PCBA Production: PCBA cleaning cuts flux residues, solder splashes, dust and oils that can cause short circuits, corrosion and other failures, ensuring long-term reliability


the advantage of cleaning and drying in a single step, making it more energy efficient. It is particularly effective for removing non-polar residues like oils and grease, which aqueous solutions might struggle with. Additionally, solvent vapor degreasing excels at cleaning intricate or densely packed PCBAs. However, solvent use requires careful handling and disposal, which can pose environmental and safety challenges. By following stringent safety protocols and using advanced solvent recovery and recycling systems, manufacturers can mitigate environmental impacts and ensure safe operations. While solvent vapor degreasing systems may have higher initial costs, these investments often result in superior cleaning performance and long-term PCBA reliability.


OCTOBER 2024 | ELECTRONICS FOR ENGINEERS 11


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