AVR-Chat

Kat
   I've done surface mount with a convection toaster oven several times 
in the past.  There are a number of articles out there describing the 
process.  I also know of a couple of folks who routinely use the process 
you are considering.  One thing I would caution you about is not using 
too much solder paste under the IC.  It could lift it to the point where 
the leads would fail to make contact with their pads.

Regards
-Bill Knight

PS - a special temperature controller is not necessary to use the 
convection toaster oven.



Kathy Quinlan wrote:
> Hi All,
> 
> OK a customer has asked me to solder up some PCB's, no problem, apart
> from the main part a DSP in a 40 lead QFN with centre ground pad this
> sucker is 6mm Sq with 0.5mm pad centres, has anyone ever soldered one of
> these ? I am planning on using solder paste and hot air, the PCB's were
> designed by me for mass production ie reflow soldering not HAND
> soldering, I am wondering if an electric skillet would get hot enough
> and reflow it ? I could quite easily go buy one and hack the sides off
> to make a flat plate, if it could also go down to 90C I could use it as
> a heat pad for warming PCB's ready for hot air re work (a re work
> station I was looking at had pads to heat the PCB up so the hot air or
> IR worked quicker)
> 
> Regards,
> 
> Kat.