Dan,
The part is an RF shield, but I don't know whether it has been chemically etched or not.  Ability to rework the shield is related to color.  I tried SERA, but the system gives squirrelly results.  We are doing SEM/EDX right now.  I think I am more inclined to believe it is due to oxide than manufacturing residues, but we should know shortly.
Bev

-----Original Message-----
From: Dan R. Johnson [mailto:[log in to unmask]]
Sent: March 12, 2003 10:59 AM
To: TechNet E-Mail Forum.; Bev Christian
Subject: Re: [TN] German Silver


Good Morning Bev,
I think I have seen the exact condition you describe. Question; Is the
component a chemical etched Rf shield?
If so what you are seeing is probably residue from the fabrication process.
As far as I know the condition is cosmetic, i.e. doesn't affect
solderability. I consider it a process indicator and contact the vendor when
we see it.
Good Luck,
Dan

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