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| From [log in to unmask] Sat Apr 27 14: |
27:44 1996 |
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I would be grateful if someone could give me information, or a document(s)
to
reference on the post mechanical drill cleaning of multi-layer PC boards. I
am looking for references to:
a) De-smearing, the chemicals commonly used, the cost and why this would
be necessary.
b) Etch-back with the above information.
c) Pumice wash with the above information.
d) Any other cleaning techniques in common use.
Many thanks in advance.
Alan Cable
Electro Scientific Industries
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