NC-559-ASM-TF is a no-clean tacky flux that can
be left on the board for many SMT assemblies. For
applications requiring cleaning, NC-559-ASM-TF
can be cleaned using commercially available flux
residue removers such INVENTEC Promoclean™ and
Promosolv™ cleaning chemistries Storage and Handling
Tacky flux should be stored at room temperature
(20-25 °C). Syringes and cartridges should be stored
vertically with the dispensing tip down. Properly
stored tacky flux has a 12 month shelf life.
This profile is designed to serve as a starting point for process optimization using
NC-559-ASM-TF. To achieve better results with voiding or to reduce tombstoning,
consider using a longer soaking zone, (140-180 °C) for 60-90 seconds, with a rapid
preheat stage. If there is evidence of solder dewetting, consider lowering the peak
reflow temperature, or reduce the time above liquidus to <60 seconds.