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Reply To: | TechNet Mail Forum. |
Date: | Thu, 8 Jan 1998 16:22:51 +0100 |
Content-Type: | multipart/alternative |
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> I'm not sure if I reach TechNet readers orderly, so this mail is a repetition
of an earlier mail.
> I dare to ask about "glue" in this sober club. Heard the following from a
> known US manufacturer of Silver Filled Epoxy:
>
> If certain silver epoxies are used on an aluminium surface, oxidizing of
silver flakes and attach of acidous hardener on aluminium can cause electrical
instability.
> So, if you attach chips by means of a silver epoxy, the interface
> between the aluminium and the glue may be: a)non-cured and
> b)silver-oxidized. Best countermeasure is to use a gold-filled epoxy
> or an epoxy which cures with something else than acid.
>
> It's said that severe grounding problems occured with "wrong" silver
> epoxy. Anyone with experience of this peculiar behavior?
Maybe the glue maker don't want to be advertized
> this way, so no names or materials are typed.
>
> / Ingemar
>
> Ericsson Microwave Systems / Sweden
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