As part of the 4553 I Ag document, we ran I Ag as a surface finish for
Membrane switch applications to 1 million cycles over approximately six
months with NO failures. The 4553 recommends the use of I Ag for membrane
switches for class 1 and class 2 but NOT class 3 applications.


Gerard O'Brien

Photocircuits Corporation
Co chairman 4-14 plating committee.




-----Original Message-----
From: Cal Driscoll [mailto:[log in to unmask]]
Sent: Monday, August 16, 2004 7:20 AM
To: [log in to unmask]
Subject: [TN] silver migration in membrane switches

Hello all-
I am looking for supportive documentation on Silver migration as it pertains
to membrane switches.

Any support on this would be greatly appreciated.

Unfortunately, I do not have any additional information. This was just a
request from my engineering group with no details.

Thanks,
Cal

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