Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.

Immersion Silver Contaminants

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Immersion Silver Contaminants | 12 February, 2014

Has anyone ever encountered contaminants from the immersion silver process, whether it be from the board house or it relates to conformal coating. The failure mode is severe de-wetting of acrylic conformal coating. All over solver resist, tops of components, pretty much everywhere on the assembly. Possibly some kind of sulphur contamination?

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