Electronics Forum | Thu Oct 15 13:55:43 EDT 1998 | Steve A
Dave, The first step would be to learn to accept the residue. IPC class 2 has no problem with it. If that is not possible, I am not sure why a no clean is necessary- but I will take your work for it. Alcohols will dry out the residue, and turn it
Electronics Forum | Fri Jul 30 17:32:15 EDT 1999 | Dave F
| Very shortly I will be evaluating OA flux and aqueous cleaning to replace our RMA and solvent cleaning process. I am primarily interested in batch aqueous cleaners for reasons of budget, floor space, etc. I am concerned about the ability of H2O t
Electronics Forum | Tue Dec 29 04:27:08 EST 1998 | John W
| I have an inbteresting problem on my N2 wave soldering lines. | We have two N2 wave soldering line. Line A is old one and Line B is new. | We found solder balling Phenomenon on PCB After soldering in the new N2 Atmosphere Wave Soldering Machine. In
Electronics Forum | Tue Sep 21 10:53:53 EDT 2004 | davef
We know nothing about Envivar UV 1244 and you weren't real clear about the details of the problem or the materials [eg, ws flux, solder mask, etc], but we'd speculate your adhesion problem goes back to the cleanliness of your board. First by 'alcoho
Electronics Forum | Wed Jan 05 08:58:13 EST 2005 | davef
Q1. Is it enough to use only water while cleaning or is it necessary to use any additional chemistries and/or saponifiers as well? A1. It depends on: * Flux residues that you're cleaning * Standoff of the components * Cleaning technology [we've neve
Electronics Forum | Thu Feb 01 17:34:45 EST 2018 | Mike Konrad
Thanks for the kind words Dave. At no point in my reply was I trying to sell anything. I apologize to anyone who believes otherwise. I agree with the poster, if assemblies are going to be cleaned, consider a flux designed to be cleaned. While this is
Electronics Forum | Sat Jan 06 22:09:53 EST 2001 | Greenman
Cory, I've got a lot of experience of testing of this type. The physical (not chemical) nature of the flux residues is the crucial issue in compatibility. If you have a softer residue (either caused by a thick initial solder paste deposit, or a low p
Electronics Forum | Wed Jul 05 17:06:36 EDT 2000 | Michael Parker
Patrick- You have not given enought detail of the type of discoloration. Is it "white residue"? Can it be "rust" colored? Whatever it is, you fab supplier needs to be called in immediately and give you an exact reason for this failure. Just rubbing
Electronics Forum | Wed Mar 20 20:02:06 EST 2002 | davef
Surfactant. A synthetic detergent made from petrochemicals that lowers the surface tension of water and allows better cleaning in small spaces. Do you have a cleaning issue that requires you to use a surfactant? If so, be aware that you must clean
Electronics Forum | Wed Oct 08 08:30:21 EDT 2003 | christ
Hi Dave: I'd second you.Thanks for your effort and can you give me the hints about correct reflow profile for soldering PCBA.I doubt there was something problem during reflow,I found there were some flux residue left on the PCBA after reflow by th
