Hello:

Our customer made a mistake on their print.  Instead of specifying
immersion gold, they specified Hot Air Solder Levelled.  Now they have
LOADED boards that they want to get immersion gold on.

Has anyone done this?  The questions I have off the top of my head are:
1. How do you protect the components from the immersion gold?  Would
conformal coat work?
2. Do you have to strip the solder first, or can you go gold over
solder?
3. What, if anything, would all this do to reliability?

Thanks for your help....

ralph richart

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