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The Knowledge and Know-how Connection
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June 19, 2013
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Contamination Prior to Conformal Coating
Can pink anti-static foam leave a residue on PCB's that may inhibit good adhesion of conformal coating?
Expert Panel contributors for this topic:
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Harold Hyman, Consultant, VJ Electronix |  |
Jim Williams, Chairman, Polyonics, Inc. |  |
Ken Bliss, President & CEO, Bliss Industries, Inc. |  |
Phil Kinner, European Sales Manager, PVA Inc |  |
Edward Zamborsky, Regional Sales Manager, OK International Inc. |  |
Steven Adamson, Market Specialist, Nordson ASYMTEK |  |
Hartmut Berndt, President, B.E.STAT group |  |
Chris Palin, European Manager, HumiSeal |
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Views: 1474
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Some kinds of pink antistatic foam have been shown to transfer reactive fluorine compounds to silicon wafer surfaces during storage in humid conditions. This has resulted in corrosion of exposed aluminum bond pad surfaces, causing later assembly problems. I had direct experience with this at a former employer, and you can find similar reports in the literature if you search for them.
Randall Brynsvold, AVS, USA