Electronics Forum | Tue Aug 13 16:47:22 EDT 2002 | mick
The residues are from the flux, not adhesive. Do you have flux management system in oven? You also need to check the flux type = can you use low solids. The effect is the same as steam in bathroom - it is cooling affects in exhaust and flux reforming
Electronics Forum | Mon Aug 19 04:48:27 EDT 2002 | surachai
I'm not found this problem with adhesive but found in NC flux , Then you should get some residue and analyse it by SEM and EDX for specify the actual source ( flux or adhesive ? ) , if it 's from adhesive , sometime your supplier must join this pro
Electronics Forum | Wed Aug 14 02:50:49 EDT 2002 | fastek
I hated no-clean for that reason. Yea, the boards are pretty clean and in many cases don't need cleaning but it's not worth it when you consider what it does to your ovens in my opinion. Do water soluable fluxes cause the same havoc in a re-flow?
Electronics Forum | Wed Aug 14 03:14:39 EDT 2002 | lloyd
Thanks for the replys'. So are you saying that SMD adhesive contains a flux agent?, because at this point in the process the boards have no solder on them at all, it's all done at a solder bath after the chips have been bonded.
Electronics Forum | Wed Aug 14 11:34:24 EDT 2002 | carln
Is your exhaust duct connected to a reflow oven that is used for flux? The condensate may be carring over from another oven that shares the same duct.
Electronics Forum | Tue Aug 13 20:57:01 EDT 2002 | davef
We don�t use this glue. What does Heraeus say about your condensate? [I'm With the previous poster. Your condensate sounds like goop from NC flux not glue.] How to clean out a 3 meter length of chimney? Depends on your tolerance for pain * Take
Electronics Forum | Wed Aug 14 10:01:42 EDT 2002 | davef
No. Since most glues don't don't give-up many solids, we're [at least I am] speculating that you are using the same oven for both reflow and glue cure and that the 'slime oozin' out from your TV set' [FZ 'Overnight Sensation']. Ooops, no the slime
Electronics Forum | Mon Aug 19 09:42:56 EDT 2002 | blnorman
I agree with analysis. You'll never accurately find the source until you determine exactly what the "goo" is. We have this problem, but like previous posters, the goo is flux residue. We do use the ovens for both reflow and adhesive cure. The adh
Electronics Forum | Wed Apr 03 04:08:20 EDT 2013 | ericrr
Yes well, now we used to add a bit of flux to our leaded paste to make it slightly runny, But when we went to unleaded paste the joker who came in from another company to set the temperature on the oven said "you dont add anything to unleaded paste!.
Electronics Forum | Thu Apr 05 12:25:01 EDT 2001 | davef
Talk about bucking the trend!!! OK, OK, I know some US military work still requires RMA. You�re both correct. Cleaning decisions for RMA fluxed boards are based on customers requirements. [Some do (clean) and some don�t.] Older US military speci
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