Electronics Forum | Sat Aug 18 12:28:46 EDT 2007 | shing
I have checked all the method before, the problem still exists. Is there are more easy way for operator to visually check solder paste on golden finger? for example: using a special light as a tools for operator to identify the problems easily.
Electronics Forum | Thu Aug 23 09:52:38 EDT 2007 | d0min0
Hi, in past we had an issue with ENIG surface, black was Ni that get pass the Au - but it was discovered after reflow (SnPb) and the IC was losing contact with Cu tracks...at customers application :| Reason was as I remember too thin Au sufrace... w
Electronics Forum | Wed Jan 12 13:42:19 EST 2011 | dwonch
Hi All, I'm hoping there is a PCB expert or two hanging around. We're having some solderability issue on our boards. The finish is ENIG but it doesn't seem to be related to the finish process itself. We did SEM and EDX analysis and found aluminum an
Electronics Forum | Fri Nov 08 17:49:05 EST 2013 | davef
First, it's a surprise that your failure analysis lab thought everything was OK with these boards. They look like shit. Second, a few years ago, there was a bunch of complaints about ENIG boards with issues similar to what you're observing. There wa
Electronics Forum | Wed Jun 17 16:08:37 EDT 1998 | upinder singh
We are facing a problem of high contamination on boards after wave soldering. We want the contamination to be under 24 ugm/inch square. We are using a no clean flux with the spray fluxer unit of wave soldering. The contamination is higher on the end
Electronics Forum | Wed Jun 17 16:19:10 EDT 1998 | Ryan Jennens
| We are facing a problem of high contamination on boards after wave soldering. We want the contamination to be under 24 ugm/inch square. We are using a no clean flux with the spray fluxer unit of wave soldering. The contamination is higher on the e
Electronics Forum | Fri Mar 06 10:32:34 EST 2009 | fountain42
Yes, We've already experienced this same problem. 1) What kind of flux are you using? No Clean? Rosin? OA? 2) If it's OA, What kind of water wash do you do? Do you use DI water? How Hot? Who's machine? What are the pressures? 3) Have you performed a
Electronics Forum | Tue Apr 03 22:03:18 EDT 2001 | davef
With friends like you, who needs enemies? I�d guess that the perceived benefits of flat pads for your 20 mil pitch and below components counter-balance the higher cost, gold being a solder pot contaminant, limited solder mask compatibility, potentia
Electronics Forum | Thu Jun 14 21:20:23 EDT 2001 | davef
Aw, don't be such a baby!!! ;-) It's a blank of a lot cheaper than ENIG. Costs about the same as HASL, maybe even cheaper. Why not have your fab build-up a split a lot [er, maybe build a few extra, whatever.] next time you order your "favorite" b
Electronics Forum | Tue Oct 21 22:25:35 EDT 2014 | richardciccarone
Thanks for the input. I read that paper. I'm not convinced the Pb stabilizer and bath MTO's are a cause of the Black Tar defect. If that were the case, given the history of Pb stabilizers and ENIG, I would have thought that there would have been many
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