Determining the Effect of Fine Mesh Solder Powder on Flux Residue Removal

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[Ravi Parthasarathy, Kalyan Nukala, Timothy O´Neill, Terry Munson]

Investigation of the influence of the finer solder powder deposits on the cleaning process and the materials, by measuring the Surface Insulation Resistance (SIR) and ion chromatography analyses.

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As a follow-up to the article “Jet Printed Solder Paste an Cleaning Challenges”, this study tests a conventional no-clean flux chemistry with increasingly finer SAC305 solder powders using a variety of cleaning chemicals and methods to try to quantify the impact of finer mesh powder on flux removal.

In this white paper, you will learn what impact the finer solder powder paste deposits have on the cleaning process and materials using surface insulation resistance measure (SIR) and ion chromatography analyses.


ravi-ParthasarathyRavi Parthasarathy, M.S.Ch.E. Senior Application Engineer, ZESTRON Americas Ravi Parthasarathy, M.S.Ch.E., is a Senior Application Engineer at ZESTRON Americas. As a long-standing member of IPC, SMTA, iNEMI and iMAPS, Ravi has presented numerous technical studies addressing critical cleaning challenges within the electronics manufacturing industry and is also actively involved in several IPC Task Groups. Ravi has contributed to several case studies performed in collaboration with manufacturers of electronic assemblies, cleaning equipment providers, and solder paste suppliers. He has written and co-authored several technical articles in industry journals such as Circuits Assembly, SMT Magazine and Global SMT and Packaging.
Kalyan NukalaKalyan Nukala, M.S.Ch.E., PMP® Application Engineer, ZESTRON Americas Kalyan Nukala, M.S.Ch.E., PMP® is an Application Engineer at ZESTRON Americas. Mr. Nukala is an active member of the SMTA as well as the IPC. He has contributed to multiple case studies performed in collaboration with major cleaning equipment manufacturers. He was instrumental in the extensive technical paper series “DI-Water vs. Chemistry” as well as the lead-free and eutectic screening series completed at ZESTRON’s Technical and Analytical Center in Manassas, VA.
Co-Writers: Timothy O´Neill, Terry Munson

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