Electronics Forum | Tue Aug 10 05:32:42 EDT 2004 | praveen_madaan@jabil.com
Hi, Has any body experienced the problem of poor cotacts on HDMI connectors. The connectors pins are gold plated and we see some kind of white residue on the gold pins.How to check if this is a flux residue?We are using No Clean flux in wave solderin
Electronics Forum | Tue Aug 10 07:10:11 EDT 2004 | abraham
Praveen, White powder residue can be produced if you clean the No clean flux residue with isopropyl alcohol. Check whether you are using any IP for local cleaning. In case you want to clean the noclean flux residue ( as per the requirements of conta
Electronics Forum | Thu Aug 20 14:52:40 EDT 2009 | davef
Armando: We're guessing that the white residue is on the laminate also. We believe that the residue has something to do with your low residue flux and water. It could be: * Water contamination in the flux. * Poor selection of preheat temperature that
Electronics Forum | Wed Aug 18 11:25:12 EDT 1999 | J.J. Thomas
| WE ARE CURRENTLY HAVING PROBLEMS REFLOWING BOARDS WITH WHITE TIN PLATING. WE ARE NOT GETTING GOOD WETTING ON THE PADS. | WE HAVE CHECKED THE REFLOW PROFILE AND TRIED DIFFERENT PASTE'S. | WE THINK THERE MAY BE CONTAMINATION OR OXIDATION ON THE PADS.
Electronics Forum | Wed Jan 20 21:25:32 EST 1999 | Tony A
| I get white residue on my PCBs after vapor degreasing. No comments on the vapor degreaser. Yes, I still use one of these. I use a vapor degreaser and a 1,1,1 replacement solvent due to the quick clean and quick dry times. Anyway, I only get whi
Electronics Forum | Mon Apr 22 20:55:00 EDT 2002 | ianchan
Hi, this is not really a technical solution, just a feedback. we too have a model series using the same WS paste type. it gives a dull solder joint with white residue that can be marginally removed after post-DI water rinse (ie. not 100% removed).
Electronics Forum | Thu Sep 13 11:27:28 EDT 2007 | davef
After receiving either a water soluable or low residue soldered board for rework, in a real life work environment, regardless of the quality of the documentation, we can picture it a bit confusing for troop to consistantly select the proper combinati
Electronics Forum | Wed Aug 18 15:52:21 EDT 1999 | DENNIS FOWLER
| | | Gian | | | | | | You alarm me when you talk of white residues in a "no-clean" process. This should not happen. It sounds like you have compatibility problems between different residues and/or a poorly polymerised solder mask. | | | | | | Ther
Electronics Forum | Fri Apr 18 15:38:22 EDT 2008 | ck_the_flip
Do you have a picture? SMTNet HAS the technology now to post pictures. "Disturbed" to the typical Q.E. usually means grainy or dull, or a wrinkly solder appearance. All of this has to do with the "grain structure" of the solder joint. Here's a p
Electronics Forum | Tue Mar 30 02:58:55 EST 2004 | Grant Petty
Hi, Thanks for the ideas. With the solder mask curing problems, can you normally wipe off the white residue, as we can do this on our boards with our fingers. It's almost like the surface of the board has a "wet dried up" look to it, and it's a smok
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