> > andrewm worte:
> > However the QFNs that you can hardly
> > see the pads on the side of there is
> > not much choice but to reflow them.
> > Also anything with an exposed pad
> > you must reflow.
> Leon wrote:
> I do thermal pads by putting a hole in
> the centre of the pad hole and feeding
> solder in whilst melting it with the
> iron tip. The RF heating used by
> Metcal helps a lot with this sort of
> thing.
Good idea feeding the solder through a
large hole. Does the hole have to be
plated through or will it work on
home made boards ?
Would not have worked for that last
board I posted though :(. This is
the back side of it
http://www.thehacktory.com/Simple-IR-RX-Prototype-V1p4-Bottom.jpgYes - the little surface mount IR
receiver module is directly behind
the QFN28-4.