Recently had occaision to have some problems associated with recovering
scrapped PCB's that have as final finish UNFUSED plated Tin or Solder (wasn't
sure which).  Is there anyone who can enlighten me as to why an
assembler/user would want such a finish.  The finish oxidizes heavily, and
quickly, and I suspect likely needs to be cleaned immediately before
soldering, or alternately requires a flux so active that it will etch the
substrate if not washed off in a few minutes....

Other than that, it is likely wonderful??

Can anyone help me understand this strange (to me) finish?

Rudy Sedlak

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