Rosin Vs. Non-Rosin Wave Flux - Which Creates More Reliable Electronic Assemblies?Authors: Adam Murling and Ron Lasky, Ph.D.
Company: Indium Corporation
Date Published: 9/27/2015 Conference: SMTA International
A manufacturer can choose either a rosin-containing or a non-rosin-containing flux based on the solvent used, the ratio of flux to solvent, and the current cleaning process, to name a few. The choice is made as a result of multiple factors that come into play when wave soldering, such as thermal profile, type of flux, flux application, solder alloy type, preheat time, temperature, and wave contact time.
In this series of experiments, the independent variable was the flux type. The previously mentioned variables were varied in a designed experiment format. To evaluate the quality of the resulting assemblies, the current IPC surface insulation resistance (SIR) test was employed. Data were collected to determine the reliability of three rosin-containing and three non-rosin-containing wave fluxes. In addition, microphotographs of typical resulting solder joints were taken to observe workmanship and esthetic properties of the solder joints.
wave soldering fluxes, wave soldering, SIR testing
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