Gents,
there has been a bunch of mails with respect to solder compatibility but to
be
honest I`m more confused than before. The initial question about mixing 63/37
tin-lead solder plating with 96.5/3.5 silver-tin wave solder process with
respect to intermetallics produced some replies - but:
1. How do I manage to get rid of nearly all of the lead by a wave soldering
pro-
cess ? Anybody who can tell how much of the 63/37 solder is washed away ?
While handsoldering I experienced that pretinning a 63/37 tin-lead solder
plating
with Sn96 - even if done more than once - will not result in a plain Sn96
finish.
You will still find amounts of lead in the range of 0.6 - 5%.
2. What is the final solder composition if lead is still a part of it and
what about the
physical/mechanical properties ? Doesn`t 1% (or less) will decrease the
melting
point? Couldn`t be silver washed away ? And what about the mechanical
proper-ties of
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
* with <subject: subscribe/unsubscribe> and no text in the body. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
***************************************************************************