Re: gEDA-user: Baking chips to dehumidify before reflow

["Peter TB Brett" <peter@xxxxxxxxxxxxx>]

Randall Nortman wrote:
> 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.
>

You could try putting them in a sealed container with some bags of silica
gel for a few days.

Peter

--
Quake II build tools: https://adidas.servegame.org/projects/buildutils/