It's a bit off-topic to this subject but is anybody knows what type of flux
I could use for SMT paste? I'm experiencing problems in wetting the
soldering pads using the paste and hot air technique to solder components to
a new PCB - rework is no problem when the pads were previously soldered.

Thanks,
Tamas


On 6/12/07, Alan B. Pearce <A.B.Pearce@rl.ac.uk> wrote:
>
> >As long as the flux says 'no-clean' flux you can trust it to be so.
>
> I guess that depends on the reliability you want from the circuit.
>
> Unfortunately all fluxes act as a sponge, so any water around will get
> absorbed and act as a conductive path - which I suspect is exactly what
> Neil
> was having problems with, seeing it was an ADC input.
>
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