Hi Amol,
Unfortunately, TAL is not a very useful concept, because it does not tell you
how long you were above the needed minimum reflow soldering temperature,
which definetely is NOT the Liquidus temperature, and certainly not 183C. You need
to be Liquidus (for the solder you are using)+20C for 5 seconds or longer
when soldewring to Cu, higher than that if soldering to Ni.



Werner



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