Electronics Forum | Mon May 24 06:00:23 EDT 2004 | johnwnz
call me picky but doesn't hydrogen combust? maybe soemthing you could do is look at your process and your products and decide if you actually need to run in N2. Yes ok I can hear the crys now but seriously, for the vast majority of things if you have
Electronics Forum | Thu Oct 04 10:54:11 EDT 2012 | eniac
I have only one incredible idea: this is example of different speed of heat transfer of neighboring pads. I saw it two times during last years, but on lead solder pastes (Sn63Pb37). The reason of this mistakes each times we found two: 1. errors duri
Electronics Forum | Sat Dec 02 11:35:30 EST 2006 | davef
Best dross remover is to not produce dross. Search the fine SMYnet Archives for previous discussions Dross will not increase signicantly * Another story, that lead-free solders will generate a greater volume of dross than conventional materials, is
Electronics Forum | Thu Apr 29 17:19:59 EDT 1999 | Kevin Hussey
Hi Boys and Girls, I've been given the "task" to turn off the nitrogen in our reflow ovens. I am using the BTU, TRS series ovens, each with eight zones. Also, I have a couple of new BT Paragon ovens with 10 zones. We currently are running Qualite
Electronics Forum | Wed Dec 09 10:02:10 EST 1998 | Earl Moon
| Does anybody out there have any special insights into utilizing no clean paste in high frequency RF applications? I would imagine there may be some issues with solder balls that would affect functional test (Earl, do you have something for me here?
Electronics Forum | Tue Mar 09 07:06:42 EST 1999 | Charles Stringer
| | | | I need to setup an oven to run with a nitrogen atmosphere for | | boards with BGA's, but our ovens do not have the optional atmosphere monitor and controller. Is there a good way to sample and control the atmosphere without the optional bui
Electronics Forum | Fri Dec 15 11:45:38 EST 2000 | DaveJ
All, Thanks for your quick response. However, my primary concern is not the question of solderability advantages of nitrogen versus air. With all things (zone temps, track speeds, flow rates, etc.) being equal, what would be the profile differences o
Electronics Forum | Fri Dec 15 11:21:45 EST 2000 | ralph
In my experiance, I have seen no difference in profiles between nitrogen and air reflows. What I understand is that the Nitrogen blanket allows for a greater solderability to gold plated pads. I also found that when dealing with fine pitch componen
Electronics Forum | Fri Dec 15 08:44:17 EST 2000 | DaveJ
I need some advise from the reflow experts. In your experience in nitrogen versus air reflow, what would be the differences in profile parameters? For example, if I profiled a board in nitrogen and achieved (for a particular component) ramps rates un
Electronics Forum | Wed Dec 20 22:24:03 EST 2000 | Greenman
Dave: In terms of heat transfer, air is 78% nitrogen, and the remainder is mostly (20.9%) oxygen (roughly the same molecular weight as nitrogen), with a bit of argon (0.9%), CO2, hydrogen, monosodium glutamate etc. So you would expect virtually no d
