By silver glue I guess you might be referring to a silver loaded adhesive or
ink whereby the silver is encapsulated in an epoxy or PVC or polyester or a
even phenolic system. For there to be migration there would have to be
dissolution in one form or another of the silver, generally it would have to
be exposed to moisture for this to happen, hence the encapsulation by a
silicone would prevent moisture ingression and reduce the risk of migration.
I can't say for certain because I don't know the material you're working
with, but if your 'glue' is properly set then I suspect the silver will be
protected sufficiently unless your product is subjected to some form of
extreme condition or use.

Andrew Hoggan
BBA Associates Ltd
www.bba-associates.com

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Elias Allan Bareno
Sent: Tuesday, July 10, 2001 02:14
To: [log in to unmask]
Subject: [TN] Silver Migration


Hello Folks,

     Could anyone help me explain how does silver migration occurs?  We have
had some problems like exposed silver glue meaning not covered totally by
silicon encapsulant. Will this scenario lead to silver migration?




Allan J. Bareno
Process Engineer

Process Engineering Group
Tel Nos. (632)8445139 ext.288
RF Personal Communications &Consumers
(6349)5430001 to 25 ext 288
Philips Semiconductors Philippines Inc.
Fax Nos. ( 6349) 5439368
Philips Avenue, Light Industry and  Science Park 1
email: [log in to unmask]
Bo.Diezmo Cabuyao Laguna   Philippines 4025



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