Homebrew PCBs

Adam Seychell <a_seychell@...> writes:
> Use glass cloth under the PCB to avoid local hot spots.

Some other ideas, depending on what you're trying to accomplish:

1. Aluminum plate distributes the heat pretty evenly.

2. Coins.  Put a coin on the hotplate that's about the same size as
   the chip (a dime for 0.5mm QFN-32), and only that part of the board
   heats up.

I've used the coin trick to remove and re-install QFNs.  I think part
of the trick is to put a few dots of solder paste near the chip so you
know when it gets to melting temperature.