Electronics Forum | Sun Apr 05 18:59:15 EDT 1998 | Graham Naisbitt
Jaqueline There are so many variables in the electronic assembly manufacturing process involving more than 12 different chemistries, that it is impossible to easily identify and determine the nature and reason of such residues. GEC Hirst Research in
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 | Fri Nov 19 15:52:55 EST 2004 | brent.robinson@donnellye.com
Hello all, Just curious as to what type of chemistries most people prefer to use and what produces the best results. We currently have an EMC Global Technologies Cyber Clean 1000 Model 32P system. We use Isopropyl Alcohol currently to clean st
Electronics Forum | Mon Dec 06 08:55:11 EST 1999 | Dave F
Vinesh: The white residue is perfectly expected, when washing a no-clean with water (and some alcohol). In some cases, the white resin that you are seeing can be removed. Your paste supplier should be able to provide details. Recognize that clean
Electronics Forum | Tue May 26 14:10:24 EDT 1998 | Ryan Jennens
We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not localized to just t
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 | Wed Jul 21 17:49:52 EDT 2004 | jsk
problem: Too many solvents and boards are not clean Flux remains on the board after vapor degreaser and "Powdery" white residue after vapor degreasing Flux type is kester 186 Process: hand solder High Temp alloy, spot clean after hand solder e
Electronics Forum | Mon Mar 27 09:58:19 EST 2006 | samir
When you say "unacceptable" do you mean cosmetically unacceptable? I've always put as much flux (no clean, of course) on the board until the ICT guys start yelling at me. That's how I roll... Lots of factors with no-clean flux residues...board mas
Electronics Forum | Tue May 26 19:20:39 EDT 1998 | Graham Naisbitt
Ryan, Please consider the following: There is no such thing as no residue flux. Low or no solids flux contain "wetting" agents to help the stuff stick upside down! Try painting your ceiling with less than 2% solids paint!! With all this excess liquid
Electronics Forum | Wed May 27 16:02:32 EDT 1998 | Chrys
| We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not localized to
.gif)
