Electronics Forum | Mon Aug 12 22:11:23 EDT 2002 | davef
I agree with what those other guys said. You problem description is vague. Please describe: * 'Broken' trace appearance * Where it is located * Process steps up to discovery * Board design * etc.
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 10:58:37 EDT 2002 | davef
Wow. We've never seen that. You make a reasonable assumption. Since your PD944 is fairly widely used, what does Heraeus say?
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 | Tue Aug 13 20:58:45 EDT 2002 | davef
Kevin: What was the thinking behind your using a flux that required cleaning �on a post wash assemble for a power switch�? How do you keep the remaining corrosive flux residues from causing trouble [ie, corrosion, CAF, etc]?
Electronics Forum | Tue Aug 13 20:54:48 EDT 2002 | davef
The major profiler companies [ie, KIC, ECD, etc] give away FREE Excel spread sheets that list everyone's oven and paste and allow you to input board characteristics and then it suggests a profile. Go get one.
Electronics Forum | Tue Aug 13 16:59:17 EDT 2002 | stefwitt
have you tried this one? www.smtnet.com/career_center/dsp_view_job.cfm?listing_id=1591 good luck!
Electronics Forum | Thu Jan 09 07:39:27 EST 2003 | Susan
I need a manufacturing/process engineer with surface mount assembly exp in advanced fiber optic networking systems for video, audio and data transmission. If this is you please contact me right away. The position is on the east coast. Susan
Electronics Forum | Tue Aug 13 17:34:44 EDT 2002 | pjc
The Electra is Electrovert's top-of-the-line wave solder machine. Just about the best you could get. Conveyor concerns should focus on the condition of the extruded rails. A machine that new should not have a problem, buy worth a look see. Find out i
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