Bill,

Was this the first time you used ENIG boards?  Did you get the ENIG boards from a PCB fabrication that you've used often for production boards?  I wish I had some useful information that will help your current situation but the only thing I can offer is that when you are in the position that you look like the north end of a southbound mule tell your customer the truth.  What you've been told that this is NOT a unique problem is correct.  Fortunately it doesn't happen often but when it does it hurts.

Regards,

George

George M. Wenger

Andrew Wireless Solutions

Senior Principal FMA / Reliability Engineer

40 Technology Drive, Warren, NJ 07059

(908) 546-4531 [Office]  (732) 309-8964 [Mobile]

[log in to unmask]


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
Sent: Tuesday, October 20, 2009 7:21 PM
To: [log in to unmask]
Subject: [TN] ENIG Issue

Fellow TechNetters:  I ran into a problem and I am looking for more information.  We had some PCB made with ENIG for SMT applications.  We populated the backside, ran them through the convection oven, the solder fillets were fine.  Populated the first five (5) PCBs on the topside, ran them through the convection oven, and the solder fillets were quite bad, actually dewetted.  Could not even be touched up.  Tried two (2) more random PCBs and got the same results.  Never have run into this before but have been told it is NOT a unique problem.  Has anybody had this happen?  Have to tell our customer that they are not going to be getting their PCBs on time and would rather not look like the north end of a southbound mule.



Thanks in advance for your assistance.



Bill Black

1 631 667 9699   X13

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