Electronics Forum | Mon Aug 22 22:40:52 EDT 2016 | twhoo
analysis report is as attached. Pls let me know what you think of the root cause of this issue? Can i conclude this is a black pad at thru hole ring with a root cause of contaminated gold
Electronics Forum | Wed Jun 15 02:09:50 EDT 2016 | twhoo
Anybody see this kind of reject. The thru hole ring turns black (certain area) after wave soldering. The affected area cannot be soldered. Manual touh up is also not possible. Anybody what is the cause of this? Any lab test to prove what is the ite
Electronics Forum | Mon Jun 27 11:01:58 EDT 2016 | mufflerbearings
From the pic, it looks like you have a bad board; ENIG process issue. It used to be called black pad for SMT but I'm sure it's the same condition for T/H. Any good electronic lab should be able to id the black stuff. I would also send raw boards bac
Electronics Forum | Tue Aug 02 15:02:50 EDT 2016 | davef
ASPIS (Advanced Surface Protection for Improved Reliability PCB Systems) The three year Aspis ‘Research for SMEs’ project has been conducted to address problems found with the nickel gold (ENIG) solderable finishes that are used by the electronics in
Electronics Forum | Thu Nov 07 21:50:58 EST 2002 | Juan C. Ruiz
I work in a plant located in Monterrey Mexico, I would like to know where I can sent some boards to be analized since we have the suspect to have a black pad problem with the boards. Any Idea?
Electronics Forum | Tue Mar 11 08:33:31 EST 2003 | davef
SMTA [www.smta.org] New On-line Presentation - March 14 Dealing with the Black Pad Defect in Manufacturing Solectron Vice President of Technology Srinivas Rao And Director of Process Integration Kim Hyland Date: Friday, March 14 Time: 10:30AM - Noon
Electronics Forum | Wed Mar 19 09:59:45 EST 2003 | davef
Jodi What's your thinking on the black pad rework technique proposed in: �A Failure Analysis And Rework Method �� Z. Mei, et al, SMTA International 1999, p407
Electronics Forum | Thu Mar 20 09:50:42 EST 2003 | Jodi Roepsch
We have not found a way to rework boards successfully at this time. Boards with severe black pad get scrapped.
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 | Fri Nov 08 14:32:23 EST 2002 | juan_ruiz
Thanks Doug! I will follow your recomendations.
