Electronics Forum: white and residue (Page 8 of 41)

Mixing No-clean and water soluble processes

Electronics Forum | Tue Feb 23 16:45:36 EST 2010 | dyoungquist

Davef is right on as usual. We are doing exactly what you do. Some smt with no clean paste then the plate through connectors on our selective solder machine using water soluble flux. We then clean with a ultrasonic water process. We do see the re

White Residues

Electronics Forum | Tue Aug 16 11:27:14 EDT 2005 | saragorcos

Hi Peter, I posted these links to Technet as well, but figured I would add them here as well in case any of the smtnet readers would like to see them. Here are some links to some articles about white residue sources, and whether or not white residue

Re: Ionic testing and No-Clean flux

Electronics Forum | Sat Feb 05 09:08:18 EST 2000 | Dave F

Casimir: Let me expand on something that I said in my response to your thread on ionic testing. Generally, no-clean people don�t use ROSE testing as part of their process control, because the ROSE test is essentially washing your board in DI/IPA �

Re: White Residue

Electronics Forum | Mon Dec 06 15:24:46 EST 1999 | C.K.

I suggest that your customer is living in a land of washable >fluxes and has not kept currect with the vagaries of no-cleans >and your mission is to educate them of: >1 Costs of washing a no-clean and then trying to remove the >white residue >2 Ac

White Residues

Electronics Forum | Tue Aug 16 08:01:20 EDT 2005 | davef

Peter: Questions are: * From your pictures, the white residue appears to be only on the solder mask. Is that correct? If not, what is the location [eg, solder, nonsolder/nonmask areas] of the residue that doesn't show well in the pictures? Further,

Operator mistakenly used No Clean paste instead of Clean.

Electronics Forum | Fri Jul 19 21:19:25 EDT 2002 | yngwie

Hi, I know this is a total screwed-up. Operator used the wrong paste. It was supposed to be a clean paste but she was issued with no clean paste. What happen was when the brd processed thru', after the reflow, the girl passed the boards thru' DI wa

Operator mistakenly used No Clean paste instead of Clean.

Electronics Forum | Sat Jul 20 09:02:04 EDT 2002 | davef

Probably 2) what is this white residue material (chemically )? => Natural or synthetic rosin 3) Can Saponifier wash, helps? If not what is the best solution to remedy this white residue. => Probably a saponifier will work. Some NC flux residues

No Clean and Underfill

Electronics Forum | Fri Mar 19 10:27:42 EDT 2010 | karlo

No clean pastes leave more flux residues. These can result in void formation and inhibtion of underfill curing. Selection of an underfill that is compatible with the flux residue is important. One company that has written about the effect of flux

White Residues

Electronics Forum | Tue Aug 16 00:27:12 EDT 2005 | Peter

Hello, I have a question on white residues formation at wave soldering. We have recently run experiments to test the performance of various halide-free water soluble fluxes (ORH0 under JSTD-004). The flux was applied through a spray fluxer and all P

Immersion gold and BGAs

Electronics Forum | Fri Aug 26 14:15:16 EDT 2005 | David

Where could I find more information regarding the double sided reflow and flux problems with white tin?


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