Electronics Forum | Sat May 16 19:31:27 EDT 1998 | Graham Naisbitt
Gentlemen, Please consider that ionic testing is designed only for detecting ionic contaminants. Yes there are instances of non-ionic contaminants that cause premature circuit failure. However, more importantly the prevailing specs are less than adeq
Electronics Forum | Sun Oct 20 12:49:11 EDT 2002 | johnw
Dave, I've had a few intersting conversations with Dr Lee, now there's a guy who know's stuff, but as it turn's out even he doesn't have all the answers on why things void. Many of his papers point towards oxides or contamination on the ball, so age
Electronics Forum | Tue Feb 03 06:52:45 EST 2004 | paul_bmc
About 2 years ago our company tried to go with a post reflow AOI inspection. This AOI was suppose to be able to inspect to a level class 3 product. **It is impossible** You cannot inspect for a heel fillet and inspecting for poor wetting is a very
Electronics Forum | Mon Jun 19 22:19:40 EDT 2006 | Nathan
Dear All, We plan to setup an assembly line for our small volume production of PCBs (about couple hundred PCBs per week). The board has about 150 components (less than 30 types) and a few BGA and IC (majority is SMT, only few THT connectors). We hav
Electronics Forum | Tue Mar 24 20:25:18 EDT 2009 | davef
It is very common to use low residue flux with low-standoff parts. On the other hand, sure you can clean under low-standoff parts. We've talked about this previously. Search the fine SMTnet Archives to find threads like: http://www.smtnet.com/Forums
Electronics Forum | Thu Jul 26 09:14:17 EDT 2018 | teresat2
When the PCB is finished, it must be mainly tested. Mark the broken plate of the short-circuit broken wire, or SMT may fix you later. In the case of Mosaic, the same location of the bad packaging together. Next is SMT welding commonly, want to look f
Electronics Forum | Mon Jun 29 15:10:10 EDT 2020 | spoiltforchoice
I would specifically look at the FLX2011 models with a V for vision (they otherwise come with Cyberoptics laser alignment as standard, although that would also work if you are not inspecting BGA balls). They come with software that I think is called
Electronics Forum | Thu Apr 15 10:05:50 EDT 2010 | dwonch
Hi all, Long story ahead.... We are having issues with board vendors on some of our higher layer count (thick) boards. Specifically under BGAs with high aspect ratio vias (14:1). We are using ENIG finish and a lead free process. Basically we get t
Electronics Forum | Thu Oct 15 14:33:37 EDT 1998 | Earl Moon
| | | It seems like most people want to X-Ray their BGAs. We're going to start doing a lot more of them and need to consider X-ray, too. | | | Q: Do most people/companies X-ray everyBGA or do they just do SPC? | | | Q: Can you get away with spending
Electronics Forum | Thu Oct 15 17:20:25 EDT 1998 | Justin Medernach
| | | | It seems like most people want to X-Ray their BGAs. We're going to start doing a lot more of them and need to consider X-ray, too. | | | | Q: Do most people/companies X-ray everyBGA or do they just do SPC? | | | | Q: Can you get away with sp
