Best leave the milk out from your Liptons as the milk sugars are probably a good
nutrient for all sorts of fungal growths.
Mike Fenner
-----Original Message-----
From: Ingemar Hernefjord (EMW) <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: 30 August 1999 15:37
Subject: Re: [TN] BGA solder residues
Sqeeeak, sqeeak, yiell, yiell, whimp, whimp, I give up, you are right, Hans. MIL
people won't like acidous residues under the BGA. I have seen what can happen: the
solder bump's lead be lead away as ions into the soup and then Merlin makes the soup
to nice cabbage crystals, as I mentioned earlier. You know Apple's symbol, will look
something like that on one side of the bumps. The only solution I will recommend
hereafter is Lipton's tea with a little milk added for cleaning under BGAs. The guy
with the 20 different white residues will be disappointed: we will never have the
time to dig so deep into the white residues, just find fastest way to avoid them.
Visited a Motorola course once, was about BGA soldering. They underlined one issue
time after time: paste application (many methods) is the key to it all, if properly
done, residues will be a minor problem. Queer enough the most lead-drained BGAs were
from Mota, but I don't thing there is a connection, they just happened be in front of
the Pb-badger. If you
We will probably get further assistance from a MIL qualified lab next door. If there
is a final BGA residue story to tell, we will let you readers know.
-----Original Message-----
From: Hans.Hinners
Sent: den 25 augusti 1999 17:08
To: Ingemar.Hernefjord
Cc: Hans.Hinners
Subject: RE: [TN] BGA solder residues
> Ingemar,
>
> Will the MIL people scream?
>
Arrrrgggggghhhhh.
An unofficial scream from a MIL person.
Hans
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