Electronics Forum | Mon Nov 13 18:36:32 EST 2023 | emeto
Your reflow profile should be designed towards the flux in your solder paste. To form a proper inter-metallic layer, you need to reach 20-30C above your melting point and stay in liquidus state for certain amount of time. SAC 105 has 3C difference fr
Electronics Forum | Tue Nov 14 18:55:16 EST 2023 | kghadiya
I relate to your problem. We face this issue sometimes. It's mostly flux from SMT, TH process or rework boards. To avoid foam in our Washer, we soak the boards in hot water for 10-15 min before running it through the washer. Or you can spray the boar
Electronics Forum | Mon Dec 11 14:30:46 EST 2023 | proy
We all know that purity of nitrogen is critical for selective soldering. When it comes to wave solder- how much or what percentage reduction in oxygen is enough to make a difference in 1) at least reducing dross buildup and 2) being anble to cut ba
Electronics Forum | Mon Feb 26 20:05:09 EST 2024 | alexv
Leaded solder is liquidus at 183C, 220C is max. Sounds to me your boards might be contaminated or the plating is poor and allows oxidation. Without seeing the boards or profile, I recommend you slow down your oven for a longer soak, to allow the acti
Electronics Forum | Thu Feb 10 13:54:22 EST 2000 | Kris W
Hi All, We are in the process of converting from RMA solder paste to no-clean process across the shop. This will allow me to carry my semi-aqueous cleaner out of the building and set it ablaze using the terpenes as the fire water. Then I can go ab
Electronics Forum | Mon Apr 17 18:42:32 EDT 2000 | Russ
Murad, I have just completed a switch over in our facility to no-clean. We used Alpha 609 and 857 paste and wave flux respectively. We currently use Alpha UP78 paste, NR330 wave flux, NR205 liquid flux for touchup and cleanline 7000 wire solder as
Electronics Forum | Sat Mar 18 07:22:37 EST 2000 | davef
Cartman: Ah, another "hidden cost" of no-clean. I love no-clean people they're putting themselves out-of-business and they don't even realize it, but at least they're saving money. Enough pontificating, "yes" to all of the above. 1 Yes, no-cleans
Electronics Forum | Mon Mar 05 13:08:16 EST 2001 | billschreiber
Hi Roger, Our customers use their Smart Sonic Stencil Cleaners for cleaning SMT and wave pallets. There are two primary protocols used. 1) If you have a large quantity of pallets and they are becoming contaminated rapidly, a dedicated stencil clean
Electronics Forum | Thu Mar 22 17:38:44 EST 2001 | davef
OK, lemme take a different angle on this, �cuz I forgot to touch on this when I first responded. I mentioned a study ["Evaluation of Low Residue Soldering for Military and Commercial Applications: A Report from the Low-Residue Soldering Task Force"
Electronics Forum | Thu Aug 24 09:23:29 EDT 2000 | Dr. Ning-Cheng Lee
You are asking a very good question which has been an issue in the industry for a long long time. For operating at 225C, you will need a solder with melting point no lower than 270 or even 280C. HMP solder is very difficult to come by. At this stage,
