Electronics Forum | Mon Jul 29 19:39:57 EDT 2013 | hegemon
No problem running lead free without nitrogen. Careful profiling will take care of the soldering. Cosmetically, the Nitrogen reflow is superior for lead free, and we see much better wetting, better coverage of the PWB pads, and of course the smooth
Electronics Forum | Sun Jul 28 05:35:25 EDT 2013 | mbb
Is it possible to run Pb-Free reflow without nitrogen?
Electronics Forum | Mon Jul 29 18:26:57 EDT 2013 | sfeinsp
We using nitrogen only for Selective Solder machine, you don't need it for reflow oven, to improve solderability we use Vapor Fase oven.
Electronics Forum | Mon Jul 29 09:27:15 EDT 2013 | charliedci
All of our reflow is with room air, 63/37 and SAC305. I believe nitrogen will get you better looking solder joints (shiny, less grainy under magnification), but per IPC, functionality and strength I don't think there is much difference.
Electronics Forum | Mon Jul 29 15:30:45 EDT 2013 | markhoch
Nitrogen in Reflow is grossly over-rated...., in my opinion, and in the opinion of several very well known SMT Industry "God Fathers". Way too much $$$, for a slight increase in the process window. If you profile your oven specifically for your pr
Electronics Forum | Mon Sep 27 10:56:01 EDT 2004 | grayman
First, for new stencil-you must ask you stencil dealer to put the markings before shipping it to you. Second, for old stencil-you buy some old angle bar or any metal plate about 1 inch by 1 inche. you engrave the markings on that plate and screw it
Electronics Forum | Fri Jun 19 08:08:17 EDT 2009 | patrickbruneel
Stephen, What does the nurse say about lead-free? You can eat as much as you want? You don’t have to wash your hands anymore? Sorry couldn’t resist.
Electronics Forum | Sun Feb 05 08:41:15 EST 2006 | Cmiller
Are you refering to reflow soldering or wave soldering? Brian, do you have any data to support that SAC305 is more reliable than Tin-Copper-Nickel? NEMI reccomended SAC type alloys for reflow and Tin-Copper for wave. See: http://circuitsassembly.
Electronics Forum | Tue Feb 07 13:39:42 EST 2006 | gregoryyork
You can use straight forward Tin/Copper but it flows very poorly so solderability is an issue. Dosing with Phos improves this but need to stay on top of it. We have supplied some 3.8%Ag alloys for flow they work well but you get a small 'chill point'
Electronics Forum | Wed Aug 01 09:10:28 EDT 2007 | patrickbruneel
Fastek, I just take every opportunity to point out the nonsense of lead-free. In today�s assembly environment the exempt military and hi-rel products are manufactured cheaper than lead-free consumer products. Now does this make any sense to you?
