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Date: | Thu, 10 Aug 1995 09:08:22 MST |
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We have been asked by a couple of our PWB Suppliers to approve a replacement
for electroless copper. One Supplier is using a palladium process from Shipley
and the other is using the SHADOW process from Electrochemicals, Inc.
Our concerns with these process are:
1) Lack of reliability data. It seems that most data is based on standard
military qualification of 100 cycles. We have a tempature range of -65 to +125
and we need boards to survive a lot more than 100 cycles.
2) With the carbon or graphite systems, what happens to the residual carbon at
the interface over time? Will a circuit see a change in resistance over time
at the interconnection?
These are just a couple of concerns that came up in our first discussions of
changing the process. I am sure there are other items to consider. I would
appreciate hearing about your experiences with any of these new processes.
Also, any leads on tracking down reliability data would be very helpful.
Thanks.
Lew Burnett
Honeywell
602-436-4744
e-mail: [log in to unmask]
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