Electronics Forum | Mon Nov 21 10:12:11 EST 2011 | callckq
All, I try to find explanation(Article)on how Nitrogen gas can make tombstone defect even worst. However, I can't find one in the net. Anyone that has this information or article, appreciate if you can share with me...Thanks in advance.
Electronics Forum | Mon Nov 21 10:51:12 EST 2011 | scottp
I've never seen a good article with a definitive explanation - just speculation that the increased wetting forces due to nitrogen result in increased tombstones. My own experience is that nitrogen is a very minor contributor to tombstones and can pr
Electronics Forum | Wed Dec 22 09:56:12 EST 2004 | davef
For BGA: http://www.smta.org/knowledge/proceedings_abstract.cfm?PROCEEDING_ID=731 For 0402: http://www.xs4all.nl/~tersted/PDF_files/Plexus/tombstoning.pdf
Electronics Forum | Thu Nov 24 07:41:33 EST 2011 | davef
Here's a paper from the SMTnet Newsletter http://www.smtnet.com/library/files/upload/dispelling_10_myths_about_nitrogen_reflow__andy_mackie.pdf
Electronics Forum | Tue Nov 29 14:55:17 EST 2011 | jlawson
N2 is a reflow process widener so to speak, for leaded reflow less of a impact, for LF more impact, and if using finer LF solder pastes T4,T5 and smaller paste deposits generally, it helps widen window for flux in paste in oxide protection during soa
Electronics Forum | Thu Jul 20 14:05:59 EDT 2000 | Mike McMonagle
With 0402 components becoming more common today outside of the telecommunications industry, our company is qualifying equipment and processes for an upcoming product incorporating 0402s. Having used 0402s in a previous position, I am planning a DOE o
Electronics Forum | Mon Apr 09 20:55:46 EDT 2012 | action_101
I forgot to add that we are using a 3 mil stencil. It seems like to me that may be there isn't enough flux left when we reach liquidous?? About half of the solder spheres do melt and wet on each pad, but the top half of each solder joint is just the
Electronics Forum | Fri Jul 23 12:49:47 EDT 1999 | Tony
| There is a practise within the industry of an Inspector inspecting a board, and that same Inspector performing touch-up. My opinion is that the Inspection and Touch-up operations should be separate functions whereby the Inspector is not performing
Electronics Forum | Fri Jul 23 13:09:48 EDT 1999 | Steve
| There is a practise within the industry of an Inspector inspecting a board, and that same Inspector performing touch-up. My opinion is that the Inspection and Touch-up operations should be separate functions whereby the Inspector is not performing
Electronics Forum | Thu Jul 13 00:45:15 EDT 2006 | donb
Haha, I have so many of these stories... where to start? My favourite was a few years back, we had a new mechanical engineer fresh out of university. As a part of his new role, he was purchasing tools & equipment for the maintenance workshop. After
