Subject: | |
From: | |
Reply To: | Leslie O. Connally |
Date: | Thu, 4 Jun 1998 16:19:39 -0700 |
Content-Type: | text/plain |
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Alex,
The manufacturers of these type poly bags use an amino-acid, which some have
eluded to as "Fatty substance" correctly. The amino acid was used as a release
agent to prevent the bags from sticking together from electrostatic attraction.
We researched the field and found other anti-static bags that did not contain
the amino-acids. I do not recall whose bags we ended up with and the one who
purchased these bags is no longer here. The pink bags did definitely affect the
solderability.
Les Connally
[log in to unmask]
> From: Alex Neussendorfer <[log in to unmask]>, on 6/4/98 12:44 PM:
> The pink bags are death on wire-bondable gold. It's my understanding that
> they contain a fat type substance. Perhaps this is what you see.
>
> ----------
> > From: Mike Bailey <[log in to unmask]>
> > To: [log in to unmask]
> > Subject: [TN] Anti-Static Bags
> > Date: Thursday, June 04, 1998 9:33 AM
> >
> > Has anyone experienced problems with packaging bare PCB's in the pink
> > anti-static bags? We are seeing a "waxy"image transfer from the bag to
> > the panel after what appears to be several months of storage in a
> > controlled atmosphere. It is aggravated by stacking individually
> > packaged boards on top of each other and has occurred on several
> > different surface finishes. The substance can also be found on the
> > non-board side of the bag. Does anyone know of what the coating might
> > be comprised? Would you predict solderability issues etc?
> >
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