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Date: | Tue, 5 Aug 1997 14:41:21 EDT |
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From: Marianne Romansky
Process Development, Celestica
Subject: ASSY:Solder mask staining
Are IPC-TM-650-2.3.38 and 2.3.39, "Surface Organic Contaminant Detection Test"
reliable methods for determining whether organic or inorganic contaminants are
present on the surface of a PWB? Is the "No residue should be seen.",
paragraph 5.3.2, criterion attainable in testing boards produced under ideal
conditions?
These questions arise from a search for the source of staining on gold
wirebond pads.
Thanks in advance.
Marianne Romansky Phone 1(416)448-6284
Celestica Inc. [log in to unmask] fax -4736
844 Don Mills Rd., MS34/178, North York, Ontario M3C 1V7 Canada
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