Electronics Forum | Thu May 18 15:13:46 EDT 2006 | slthomas
Should have mentioned that since we don't really know for sure what's causing the failure (we just know that it fails, and that there is unrepairable (by us) damage to the board that was provided by the customer), and can't troubleshoot further, we c
Electronics Forum | Thu May 18 15:47:18 EDT 2006 | slthomas
Don't really know if fixing the damage would even fix the board. The cut is deep, short, and narrow, like it was stabbed with an Exacto point. There is visible disruption to copper in the second layer but we can't tell if there is an open, a short, o
Electronics Forum | Tue May 23 09:53:05 EDT 2006 | stepheniii
Make sure your reflow profiles are the best you can make them. You will probably want to, at the very least, get some sample BGA's and boards to sacrifice to profiling. Drill a small hole through the board into a middle ball of the BGA. Also put a t
Electronics Forum | Tue May 23 09:55:47 EDT 2006 | TMC
Do you have an automated line with pick and place equipment that can handle your BGA's? Inspecting the board is a must after profile development. You may send the 1st board to a CEM for X-ray inspection. If you have a consistent process (printin
Electronics Forum | Wed May 24 16:29:34 EDT 2006 | smt_guru
Yet another example of narrow focus. "What's the best and latest machine out there, and should I use a technology that's been around for decades." Wrong approach there, Chunks! Think outside the box. My firm, Worldtronics Consultancy Services, In
Electronics Forum | Thu May 25 17:37:37 EDT 2006 | jbrower
OMG! I have to admit that you are awesome in your replies! I've shared your wisdom with my peers and we've decided to turn your coments into a game where we bet on the next very interesting thing that you post. Some of your posts have put my buddi
Electronics Forum | Thu Oct 26 08:17:33 EDT 2006 | WAH
As R&D project leader I have worked at FICO on this issue the last years. Maybe you have found the info you are looking for but for laser cutting are more companies involved than the three you found, the experience I have with laser cutting for PCB p
Electronics Forum | Wed May 24 16:19:58 EDT 2006 | inds
John, there have been quite a few discussion on Mixed Assemblies in this forum.. do a search.. you will get whole lot of information.. in addition - IF you are using Lead-free reflow profile...make sure the rated temp for Sn-Pb components is not vi
Electronics Forum | Wed May 24 16:40:40 EDT 2006 | samir
Yikes! Sounds like a hairy situation there. I've successfully collapsed a Pb-Free BGA (using a Sn/Pb solder paste), with a peak temperature of 220 Deg. C and Time Above SAC's Eutetic point (217) of 17 seconds. Beware of overcooking your smaller ma
Electronics Forum | Wed May 24 16:12:40 EDT 2006 | PWH
Hey you FlexJet users out there... We just bought a new Universal machine with a FlexJet head on it. Excellent machine. However, I'm still in the learning stage and having a little trouble with 0402's and 0603's (caps mostly but resisters as well)
