Electronics Forum | Mon Jun 14 10:23:53 EDT 2010 | pcrane
I have CCA that has a SN100C HASL coating that I am wave soldering with SbPb. I have mounting pad areas on the CCA that are masked with a pallet during reflow so they are not exposed to the solder. The mounting pads are turning gray in some areas of
Electronics Forum | Thu Oct 07 07:58:29 EDT 2010 | scottp
The problem is there are also studies showing reduced reliability. Early thoughts were that if you got complete reflow of both solder materials then you'd be fine, but several studies have shown that there's something going on that's not well unders
Electronics Forum | Mon Sep 12 10:41:50 EDT 2011 | processmxli
Hi All We have run SMT process with SnPb but we’re installing some lead free components like capacitors and resistor lead free. After the reflow oven all components have good appearance with solder join sheen. But the lead free components the solde
Electronics Forum | Thu Jun 28 09:38:14 EDT 2012 | 14367
PSMN130-200D MOSFET TRANSISTOR D2PAK - failure of some parts led to investigation, oxidization or surface contamination was noticed on remaining parts. The surface contamination could be removed when fingernail was drawn over the bottom terminating s
Electronics Forum | Thu Jun 28 09:38:20 EDT 2012 | 14367
PSMN130-200D MOSFET TRANSISTOR D2PAK - failure of some parts led to investigation, oxidization or surface contamination was noticed on remaining parts. The surface contamination could be removed when fingernail was drawn over the bottom terminating s
Electronics Forum | Thu Oct 18 11:08:22 EDT 2012 | scottp
Since we follow IPC Class III, I've done experiments turning N2 on and off and measuring void level with both SnPb and SAC305 solder. In both cases there was a statistically significant, measurable increase in voids with N2, but it wasn't significan
Electronics Forum | Tue Oct 14 19:11:44 EDT 2014 | caurbach
We have a 6622CC machine for SnPb boards. A few things you may want to try: - Solderability testing on the components/PCB. - If the fuse holders or copper in the board are sucking up all the heat, try increasing preheat. Some fluxes (like the WS f
Electronics Forum | Mon Dec 21 09:58:34 EST 2015 | dyoungquist
We are using Metcal STTC-8xx series tips. One thing that makes a huge difference on tip life is what type of solder you are using. If you are soldering with lead (SnPb) solder the tips will last 3 times longer on average than if you are soldering w
Electronics Forum | Fri Sep 09 06:03:37 EDT 2016 | jswatt
Simple answer is no you cannot do it and why would you?.. is it a cost saving thing? As Dave F correctly points out you have a fair amount of noxious fumes to handle that aren't getting exhausted if you switch of the extraction so they will go to you
Electronics Forum | Wed Dec 04 10:59:04 EST 2019 | dwl
The solder looks a little grainy for Sn/Pb solder but that might just be the picture quality. There appears to be plenty of solder on the pads, so I'd rule out anything to do with the stencil. One possibility that springs to mind; how long is your
