Electronics Forum | Thu May 01 15:42:53 EDT 2008 | ck_the_flip
Yes, the authors do give the caveat that small amount of lead contamination in a SAC/Lead-Free system is tolerated provided the Pb-BGA has sufficiently reflowed. This verbiage is on the bottom of Figure 10. For my own peace-of-mind, I would send yo
Electronics Forum | Thu May 29 17:19:51 EDT 2008 | dyoungquist
On 0402s we use 20x25 mil pads with a 15 mil gap between the pads on the pcb with ENIG finish, 5 mil stencil with a 1:1 aperture (20x25 mil) and SAC305 lead free solder paste. We very rarely see any tombstoning on 0402s using this setup.
Electronics Forum | Wed Aug 13 22:23:24 EDT 2008 | davef
8.4 * SAC305 => 7.36 * Sn-3.5Ag => 7.5 * '....in' [96.2Sn-2.5Ag-0.8Cu-0.5Sb] => 7.39 * Sn-4Ag-0.5Cu => 7.39, 7.44 * Sn-3.8Ag-0.7Cu (Multicore solder) => 7.5
Electronics Forum | Tue Sep 16 16:24:54 EDT 2008 | vladig
Well, as we are talking about lead finish, I don't think the question was about BGA. :-) AS far as the intermnetallics is concerned, then you are right, it might require a bit more heat delivered to the joints, but it also could be perfectly fine. Th
Electronics Forum | Tue Sep 16 16:30:49 EDT 2008 | ck_the_flip
Vlad, yes, he made no mention of a BGA, but I thought I'd just throw it in there. Many people are concerned with the "backward compatible" scenario - running RoHS parts with a Sn/Pb solder paste. The scenario's a no-brainer with most components, bu
Electronics Forum | Tue Sep 30 14:01:04 EDT 2008 | wavemasterlarry
Some fella from Honda once used a potatoe to clean his pot. Siad it was a pretty good idea that he learned from the japs he works for. There was a thread here on The Forum once if you could look it up.
Electronics Forum | Thu Oct 02 03:11:42 EDT 2008 | gsala
Ask FELDER (gmbh), they can replace the alloy (SN100 +Ge+Ni ...) or even with a special kit (FUJI Patent) or if preferred you can transform the solder in the pot w/out replace it in a reliable way. http://www.felder.de/en_produkte.phtml Regards...
Electronics Forum | Wed Dec 03 01:36:35 EST 2008 | lococost
Is anyone wave soldering 0603 leadfree succesfully? We have no problems soldering them leaded, but lead free we see a lot of random skips and some shorts. We use SAC. We have tried different fluxes, flux settings, playing around with preheat, sol
Electronics Forum | Thu Dec 18 14:38:41 EST 2008 | easton
I think the BLT solder joints look very shiny for no-lead. We are getting very good top side solder with ours though. They look like this. - Gold Enig plating - Alpha EF-6100 Flux - SAC305 - Preheat topside temperatures at 110 to 120C
Electronics Forum | Wed Feb 04 08:39:46 EST 2009 | smartasp
Hi The issue is not the equipment or any other technical matter. The point is that the argument is about the 10 deg C higher melting point. The process window of SN/CU is somewhat smaller but manageable. I know Nihons web site but found not enough i
