Amino Acids as Activators for Wave Solder Flux Systems: Investigation of Solderability and Humidity Effects
نویسندگان
چکیده
The role of flux activators in formulation is to remove oxides from metal surface and, hence, allow the formation metallurgical bond between substrate and solder alloy. However, activator no-clean residue on printed circuit board assemblies (PCBAs) affects climatic reliability due its hygroscopic ionic behavior under humidity exposure. Four amino acids-based wave was investigated using wetting balance test microscopy inspection, effects four acids were analyzed electrochemical impedance spectroscopy (EIS) chronoamperometry various testing conditions. Water absorption thermal degradation gravimetric method Fourier-transform infrared (FT-IR). Combined results indicate that glutamine-based model obtained superior solderability for 96.5Sn-3Ag-0.5Cu (SAC 305) alloy suitable melting activation temperature group removal. robust dependent upon relative high deliquescence point low moisture harsh
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ژورنال
عنوان ژورنال: IEEE Transactions on Components, Packaging and Manufacturing Technology
سال: 2022
ISSN: ['2156-3950', '2156-3985']
DOI: https://doi.org/10.1109/tcpmt.2022.3167389