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 | 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 | 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 Feb 18 12:42:43 EST 2004 | babe
OK, if the sphere of the ball and the paste on the pad are both eutectic, 63/37 then the paste will reflow first causing a drop of the component, after which the spheres will reflow causing a double drop and a good intermettalic. You can see this by
Electronics Forum | Thu Jan 27 11:33:59 EST 2005 | russ
For what you have right now I would recommend that you use soldering iron tips that are made for component removal. until you get BGAs I wouldn't worry a whole lot about the expensive rework equipment. I would use specialty tips and a heat gun wit
Electronics Forum | Thu Jun 22 09:50:48 EDT 2017 | capse
Are you using nitrogen in your soldering process?
Electronics Forum | Thu Jul 20 16:08:18 EDT 2000 | Grant Baynham
Do you have any experience with flip chip applications using lead-free solder, and specifically do you have any information revealing how the process parameters for standard air reflow atmosphere can be modified to match the results for solder reflow
Electronics Forum | Wed Mar 08 10:59:04 EST 2006 | samir
Cal, thanks for the feedback. I've tried different adjustments to wave parameters with varying success. You know how wave is - what works today won't necessarily work tomorrow. ..and yes, we run Nitrogen on our waves.
Electronics Forum | Tue Nov 29 14:57:45 EST 2011 | jlawson
Sorry on N2 and tombstone, many other aspects cause tombstones and n2 in itself does not cause tombstones. It can help make other bad variables tip over edge to cause tombstones more than with no N2. Get these right then N2 is not issue.
Electronics Forum | Thu Oct 30 14:07:29 EDT 2008 | jdumont
We use a normal off the shelf (Best Buy) mini fridge. As far as the temp readings, I got some USB dataloggers from Omega and stick them in there. Download the data to your PC every couple of weeks (Outlook reminder). I also use these for our Nitrogen
