Electronics Forum | Fri Aug 05 11:32:29 EDT 2005 | saragorcos
Hi Sandy, Here are some suggestions for an optimum cleaning process for cleaning under BGAs if they are assembled to the board to add to the great tips Shean already listed: - Use a good saponifier w/ DI water - an effective saponifier will be able
Electronics Forum | Tue Jan 03 17:36:49 EST 2006 | MikeF
If you know you have cleaned any flux residues that were under there you could consider a bead of an electronic grade RTV, such as RTV3145. If you trap any uncleaned residues under there you could have long term reliability problems. But, like Dave
Electronics Forum | Fri Jan 06 09:15:34 EST 2006 | sarar
I would suggest that it would be helpful to perform ion chromatography analysis on some of the boards that have failed your ionograph tests as well as some boards that have passed. This will tell you exactly what ionic species are present on the boa
Electronics Forum | Tue Feb 28 14:32:26 EST 2006 | masrimhd
As I know, the encapsulation effect occurs only with rosin based fluxes. So if you have a PBA soldered using RA Flux, you should either wash it well, or leave it alone and it will be safe. For NC process the story is different because there�s no re
Electronics Forum | Thu Oct 05 12:14:15 EDT 2006 | Mario Scalzo, SMT CPE
Good afternoon! We have had great luck with semi-aqueous cleaners from Kyzen and Zestron, and normally recommend both of them. They both have great labs and would gladly offer their input on he cleaning of the flux residue. We make sure that these
Electronics Forum | Thu Dec 07 10:05:18 EST 2006 | Learn from U
Hi all, Sorry for the late reply..I am sure it is flux residue..Found no such symptom as Grey mention above. This is non clean process and no way we can clean this whole big board(Server) with any kind of flux removal...Currently, the ICT probe pre
Electronics Forum | Mon Apr 23 16:34:41 EDT 2007 | davef
Well then, maybe it's an incompatibilty between the soldermask and the coating, possibly due to undercuring of the soldermask. Thoughts are: * Some suppliers provide their thoughts on the compatibility of their product with other suppliers. For ins
Electronics Forum | Thu May 31 10:52:31 EDT 2007 | patrickbruneel
A solder wire classified as L0 under IPC J-STD-004 means that the flux residues can be left on the board safely, and when you select this type of cored wire the intention is not to clean. You just select a solder wire that gives you an acceptable lev
Electronics Forum | Thu May 31 11:26:33 EDT 2007 | gsala
Tnks Patrick, additional infos..... we are just playng with different NC solder wires L-F, the best results in terms of solderability (faster solder flowing, holes filling up) it seams are coming from an ROM1, as we know, according to J-STD-004, or
Electronics Forum | Wed May 30 22:09:31 EDT 2007 | jeffreys
I'm trying to find a solution that will clean our PCBAs that will meet the following criteria: 1. Low cost 2. Enable us to clean 25 - 100 PCBAs per day 3. Leave boards clean, including residue removal 4. Preferably environmental friendly 5. should b
