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June 1999

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Subject:
From:
Bryan Kerr <[log in to unmask]>
Reply To:
"TechNet E-Mail Forum." <[log in to unmask]>, Bryan Kerr" <[log in to unmask]>
Date:
Tue, 1 Jun 1999 22:30:00 +0100
Content-Type:
text/plain
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text/plain (70 lines)
I think the fingerprints you see are the result of the initially invisible
activator residues drying out and developing the fingerprint outline within
it. Try applying the activator with a toothpick or similar rather than using
the spray applicator which throws it everywhere. Hope this helps
Bryan
Alenia Marconi
----- Original Message -----
From: Tempea, Ioan <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, June 01, 1999 7:22 PM
Subject: [TN] Fingerprints


> Hello,
>
> Here's a good one!
>
> The boards one of our touch-up ladies is doing ECOs on started making
> fingerprints appear after applying the wire bonding glue.
> That is, once the small glue dots are cured, all around them and in the
> adjoining areas, a white stuff, like baby powder, is appearing, making
wide
> bands where the fingerprints show.
>
> Did anyone else experienced this? I assume it's a reaction between the
> perspiration and the glue. Is there any way to fix it, except gloves?
>
> The glue is Loctite 382. Is it the only troublemaking glue?
>
> Thanks,  Ioan
>
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