Homebrew PCBs

I have done that too, and that avoids the temperature shock.  If the
specifications on allowable soldering temperatures and time are going to be
met, it is a little more critical.  Look at the specified soldering profile
for most SMT parts and you will see what I am referring to.

 

As parts get more complex, a proper soldering profile gets more critical and
it also relates to long-term reliability and how much stress was put on the
parts.

 

There normally is a rather long temperature plateau to give the flux an
opportunity to work and then there is quick soldering phase.

Bertho

+++++++++++++++++++++++++++++++

 

From:  DJ Delorie    Sent: Friday, April 04, 2008 22:26

"Bertho Boman" <boman01@... <mailto:boman01%40vinland.com> > writes:
> Placing an SMT board directly on a flat hotplate will likely create
> a severe thermal shock to the board and the components.

What I do is put the board on a cold hotplate, then turn it on. Mine
takes about three minutes to heat enough to melt solder, which seems
to work well for me.



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