PWB manufacturers:
Has anyone seen the phenomonen of exposed copper SMT pads after
immersion NiAu. To further complicate this issue, any pad (via or SMT)
that is tied to this pad in a net also does not get plated. This condition
does not occur on every panel within the rack. One panel will have it,
while the adjacent panel does not.
Are we looking at a static charge on the panel that keeps certain nets
from plating?
Any ideas on what's causing this would be appreciated.

Thank you
Ron Hayashi

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