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Date: | Tue, 1 Apr 1997 21:15:14 +0800 |
Content-Type: | text/plain |
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Hello technetters ,
Normally those people working in the wet processes facing a lot of
argument with the drilling department as far as hole quality is concerned .
Sometimes it was quite difficult to pinpoint the source of the quality problem .
We even seen company running DS boards with FR4 & CEM3 materials through the
same drilling parameters and process through desmear line . The questions that
I would like to ask is
i.It is practical for different types of laminate i.e FR4 and CEM3
using the
same drilling parameters .
What problems will arise with CEM3 materials in terms of quality .
ii.Do DS panels go through desmear in most cases .What sort of quality
expected from the drilling section if DS panels go without desmear .
Hope somebody could give a clue to the wet processes guys .Thanks .
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