Electronics Forum | Mon Nov 22 10:57:25 EST 2004 | davef
On the dendritic growth over the top of the capacitor: We agree that your capacitor supplier probably did not do a very good job of cleaning process residues from their device. On the metallic fragments under the capacitor: This sounds like solder
Electronics Forum | Mon Jun 13 01:31:36 EDT 2005 | buchi79
Devef, The stand off height is 75micron. We only clean the product after underfill process. Dispense epoxy under the FC & cure it before aqueous wash. Samples are sent for LPC (liquid particle count) Test to ensure cleaniness. By the way, our plant
Electronics Forum | Fri Mar 17 09:24:22 EST 2006 | russ
nothing appears to be out of line. Is this KOKI a no-clean or water soluble? You may want to try to hit 225 at the problem lead with a TAL of 70 sec. You may also want to remove the soak or at least shorten if you can. We were talking about a s
Electronics Forum | Mon Oct 02 20:10:27 EDT 2006 | davef
Choices are: * Buying a helmet. * Using a paste with low residue flux. Where are you located that you can use Triklone N [1,1,2-trichloroethene, CAS No: 79-01-6, C2HCl3]? As a solvent replacement for Triklone, several companies offer proprietary bl
Electronics Forum | Thu Mar 29 08:52:59 EDT 2007 | realchunks
Hi George, Depending on your product, wave soldering twice is not all that bad. Residues will be higher, but should only be cosmetic unless your product is sensitive to ionic contamination. You can set-up an alternate profile on your wave for 're-
Electronics Forum | Wed May 16 12:32:34 EDT 2007 | realchunks
Most Durastone product have a very low moisture absorbtion rate. This makes it ideal to water wash them. I wouldn't tlet them soak in the water, but you shoul dbe safe to wash them usinf water. Once the water is used up, you should treat it as a h
Electronics Forum | Fri May 18 04:40:51 EDT 2007 | gregoryyork
Wash them in Saponifier frequently at around 40C rinse and dry thoroughly. I would imagine it could be going white if you have a resin system in the flux that is not water soluble. Ensure you are using suitable pallet material up to 300C for Lead Fre
Electronics Forum | Tue Dec 11 15:31:53 EST 2007 | chrisatae
We accidentally mixed water wash with RMA flux. When the heat was applied during through hole soldering we noticed a problem and we cleaned it as soon as we discovered it. But now there's a discoloration where it was applied. Anyone experience this a
Electronics Forum | Wed Apr 30 07:33:12 EDT 2008 | davef
It's not acceptable to us. More importantly, you need to determine if it's acceptable to your customer. Recognize that your little IPA scrub does NOT remove the OA flux residues from the board. It mearly spreads them out across the board and under c
Electronics Forum | Mon Jun 16 13:51:13 EDT 2008 | dyoungquist
We are adding water soluble flux in our manufacturing. I need to add an ultrasonic cleaner to clean the pcb assemblies. I am looking for a table top unit that can handle boards up to 10.5" x 17". We run high mix/low-medium volume. Any suggestions