Root cause: absent inge. Fix: send him to your vendor. Mechanism: insufficient dose of supervision.
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----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Fri Nov 21 02:48:39 2008
Subject: Re: [TN] black pad
If you have a contiguos cooperation with your board supplier, i.e. frequent visits to an inspections at their plant, I think you will not see much ENIG problems. It's very much about good process continuity. I've said it before: we have assembled millions of ENIG board without problems. We had some issues many years ago, learned about the process and set up a cooperation model. If ENIG was that bad, we had changed to something else, but it wasn't necessary.
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of henry rekers
Sent: den 20 november 2008 18:46
To: [log in to unmask]
Subject: [TN] black pad
Anybody out there experiencing mass dewetting issues from North American board shops?
From what I understand primary causes for dewetting (assuming the reflow/wave profile is bang on) is all on the board, ie nickel corrosion, degeneration of the nickel, or outgassing of the nickel/copper. (I'm talking enig here.)
Anybody?
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