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August 2011

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Subject:
Re: Steps to take to prevent ENIG issues
From:
Grant Emandien <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Grant Emandien <[log in to unmask]>
Date:
Fri, 5 Aug 2011 15:37:45 +0200
Content-Type:
text/plain
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text/plain (1 lines) 
Concur, though I really am amazed that black-pad is still an issue after these years! We have a variety of suppliers worth their salt from whom we buy 1,000' s PCBs a month without issues relating to black-pad. About 10 years ago was the last we experienced black-pad defects - our solution? We removed the supplier from our vendor list and voila, no problems to this day!

Black-pad avoidance is only about plating process control as Pete correctly states, nothing more.

Regards
Grant

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Pete
Sent: 05 August 2011 15:30
To: [log in to unmask]
Subject: Re: [TN] Steps to take to prevent ENIG issues

George,

You bring up many valid points.

But if it's such black magic, and so difficult, why can come vendors produce millions of boards without black pad, while others have regular issues?

Any vendor that can't be trusted to keep their plating processes under control probably can't be trusted for worth trusting for laminates, drilling, etc, .  It's come a long way since the 90's, it's not so hard any more.

Being in design, rather than manufacturing, I suppose I do view it differently.  I've always gone by if it's not too difiicult to do, we should strive to be good enough to do it.  The problem I'm dealing with now would have happened with ImAg, HASL, etc., it's just being blamed on ENiG.

All JMHO.

Pete

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