--- On Thu, 3/10/11, Dave McGuire <mcguire at neurotica.com> wrote:
I've
noticed disintegration, but not corrosion.
? Pin corrosion sets in a few years after the
disintegration if the foam is left alone enough to stay
intact.
Yes, and it's especially bad on the ceramic packages with the fragile side-attached
legs - not the ones that exit the package and then bend 90 degrees down, but the ones that
are simply attached to the side of the chip body. Don't know what they're called
or how better to describe it...
But they seem to fare the worst, I've got a few early EPROMs where many of them simply
fell off.
But something much more annoying, that just happened to me (and prompted the post), was
receiving a new, old stock Zilog prototyping part (microcontroller w/ piggyback EPROM
socket) that I paid too much for, only to open the package and find it still neatly in
it's original little promotional clamshell box. Stuck in that stupid foam. The legs
are all still attached, but they're all black with corrosion. I sincerely hope that it
will still make suitable contact with a socket. If not, I suppose I can solder it into a
machine tooled socket, but... Grumble...
-Ian