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gEDA-user: Baking chips to dehumidify before reflow



I've got some LQFP chips that I've been storing, with the bag opened,
for a bit longer than I really should have.  The indicators on the
humidity cards have started to turn pink, so I'm worried that they
will have absorbed too much humidity and if I try to reflow them now,
they'll "popcorn" (i.e., trapped moisture turns to steam and
evaporates, cracking the package and/or die).  Anybody have any
suggestions on the best way to do this using common household
equipment?  I guess I just stick them in an oven at lowish temperature
for a while, but what temperature and for how long?  I checked the
datasheets for the chips (Atmel AT91SAM7X256 and Micrel KS8721CL) and
didn't see any useful information.