Electronics Forum | Wed Oct 11 09:55:10 EDT 2000 | Ian Harrison
Some boards that are populated by one of our subcontractors are getting a white powdery residue forming on them. I think it is the non clean flux and process which they are using that is causing the problem. Their process is as follows. Flux is put i
Electronics Forum | Thu Oct 12 17:56:58 EDT 2000 | DennisF
The white residue can be caused by putting Alcohol on the no clean product. Some people will attempt to clean an area they have reworked.
Electronics Forum | Wed Oct 11 10:29:28 EDT 2000 | G. English
Try the following steps : FIRST CHECK THE ARCHIVE for further information, it WILL help you. Step One : What�s the chemical analysis of this white res? Obtain a sample. It could be tin, rosin, or something else??? Step Two : The fastest way I know
Electronics Forum | Fri Oct 13 05:21:08 EDT 2000 | Robert Steltman
Looking at the original post, it seems that the white residue is formed on the board after wave soldering and becomes evident when it has been left standing for a while. From what I understand, it seems that the solids content of the "no clean" flux
Electronics Forum | Fri Oct 13 15:16:43 EDT 2000 | Dave F
George and the others make good points. Check Les Hymes response to a similar question in 7/00 "Circuits Assembly"
Electronics Forum | Sun Aug 29 19:17:34 EDT 2004 | aqueous
Chen, It is always best to place one�s effort on determining the cause and content of the residue rather than trying to work around it. The first thing you must determine is the nature of the residue. Is it flux? In many instances, the residue is
Electronics Forum | Fri Aug 28 05:07:59 EDT 2009 | sachu_70
Do you clean the stencil manually or using the automated under-stencil cleaner on your Printer (recommended)? 1. Ensure that stencil wipes are lint-free and soaked sufficiently with solvent before use. 2. If your printer supports automated cleaning
Electronics Forum | Fri Dec 01 14:12:50 EST 2000 | Jim M.
My company currently uses water soluble paste for our SMT process. We were having trouble retaining hot water in our in line, closed loop DI cleaner. The cleaner kept shutting down when the water temp. dropped below 125C. As a result, the conveyor
Electronics Forum | Fri May 11 15:43:41 EDT 2001 | davef
More information would be helpful. For instance: * Talk about the distribution of the problem, including a single lot or from various lots and over components and component types on the board * Tell us about the board (ie, thickness, type, solder ma
Electronics Forum | Wed Oct 17 19:37:34 EDT 2001 | mparker
Duh?? white residue??? could be the source of anthrax
COT specializes in high quality SMT nozzles and consumables for pick and place machines. We provide special engineering design service of custom nozzles for those unique and odd components.
2481 Hilton Drive
Gainesville, GA USA
Phone: (770) 538-0411
