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Sn100C HASL Finish on PCB

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#63639

Sn100C HASL Finish on PCB | 26 January, 2011

had a quick question regarding compatibility of Sn100C HASL finish and regular Sn63 solder paste. Does the thermal profile have to reach Sn100C eutectic temps. in order for the Sn 100C HASL to coaelesce with the Sn63 Solder paste?

How reliable is the solder joint in this scenario?

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#63696

Sn100C HASL Finish on PCB | 4 February, 2011

If your peak temps in profiling the Sn/Pb solderpaste are 210C-215C, then no, you will not "weld" to the SN100C finish. SN100C is liquidus at 227C, too hot for most Sn/Pb solderpastes.

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