Material compatibility and field cleaning performance - KingSheng PCBA

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Kingsheng PCBA Tech Co.Ltd is an electronics manufacturing service provider to some of the world’s leading OEMs. we specializes in PCBA and full product PCB assembly, PCB Layout and design, PCB fabrication and finishing, and engineering services, with products ranging from simple consumer devices to complex, high-end commercial and industrial electro-mechanical products.

Kingsheng PCBA Tech Co.Ltd once had an opportunity to qualify a new manufacturing process for a high-reliability electronic assembly for a medical application. The SMT process used no-clean solder paste and flux that required cleaning, for which the customer planned to use an aqueous-based inline cleaning process. In addition to sensitive materials on the substrate surface, the new process included use of anodized aluminum carriers to hold the substrates as they are conveyed through the cleaner. Thus, a cleaning agent with excellent material compatibility was required.

After several testing result ,each with a different paste/flux vehicle and material compatibility constraints. Based on the results, pH neutral cleaning agents can meet the stringent cleaning requirements expected, even with burned-in flux residues from multiple heat cycles, while exhibiting excellent material compatibility, with lower wash concentrations compared to alkaline alternatives.