Electronics Forum: chloride (Page 1 of 9)

Flux Classifications.

Electronics Forum | Tue Mar 09 18:04:34 EST 2004 | davef

Obviously, if your customer instructs you to use a certain flux type, using THAT flux type is probably a good idea. Responding to your question: Chloride is one of the more detrimental materials found on printed circuit assemblies. Chlorides can com

Re: Natrium Chloride (NaCl)

Electronics Forum | Mon Mar 01 09:49:04 EST 1999 | Justin Medernach

| It seems to be that we have to much NaCl left on our assambled PCB's. | The flux we use is from cobar. They say it can not be from the flux... So what can be the reason, what kind of problem may occer when there is to much NaCl. | George, Are you

Corrosion

Electronics Forum | Tue Oct 07 14:23:37 EDT 2003 | Adam

The Omegameter (or Ionograph) detect contamination by measuring the conductivity of the solution used to extract the board. This conductivity number reflects the sum of all of the ionics in the extraction solution. Unfortunately, we can't sort out th

chemical etching

Electronics Forum | Wed Oct 16 13:16:11 EDT 2002 | davef

Hey Mar, Sounds serious!!! Poke around Buehler, Leco, or Struers Try IPC TM-650 Test Methods Manual: 2.3.6A Etching, Ammonium Persulfate Method - 7/75 2.3.7A Etching, Ferric Chloride Method - 7/75 2.3.7.1A Cupric Chloride Etching Method - 12/94

Contamination

Electronics Forum | Fri Aug 11 16:19:39 EDT 2006 | T. Oaks

Hi, We have a issue with current leakage between pins on an SSOP 28 in a low frequency RF application and there is a suspicion that it is being caused by something in the flux residue. We have had the bad boards analyzed and a 'high' Chloride level w

soldermask color change around vias

Electronics Forum | Fri Jun 07 11:19:14 EDT 2019 | gregoryyork

If you have soldered with HASL finish then the worrying chemistry will be more like NON IONIC. They sit there and attract moisture like mad and any chlorides they hold ionize in the moisture attracted and cause electromigration or SIR issues. They ca

measuring board/assy cleanliness

Electronics Forum | Wed Oct 18 09:35:54 EDT 2000 | mike weekes

Does anyone know of a less expensive technique to monitor board cleanliness (chlorides in micrograms/in2) other than omega mater - ion chromatography is costing us an arm and a leg.

Incoming Water Quality

Electronics Forum | Mon Jun 11 10:35:57 EDT 2001 | bbivins

Are there incoming rinse water quality standards - specifically maximum concentrations of magnesium and chloride - for an aqueous or semi-aqueous cleaning process? If there aren't standards, does anyone have experience with what the max can be befor

Natrium Chloride (NaCl)

Electronics Forum | Mon Mar 01 09:03:51 EST 1999 | George Verboven (Process Engineer)

It seems to be that we have to much NaCl left on our assambled PCB's. The flux we use is from cobar. They say it can not be from the flux... So what can be the reason, what kind of problem may occer when there is to much NaCl.

Un-cured conformal coating

Electronics Forum | Fri Oct 29 17:44:13 EDT 2004 | davidcb

Davef, thanks for inputs. I think your correct, we have since obtained some ionic analysis and sure enough there is relatively high chlorides on the bare pcbs. The toluene is controlled within dip tank / drying system, almost no exposure to workers.

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