Electronics Forum: sulfur (Page 3 of 4)

About the PCB gold finger contamination.

Electronics Forum | Thu Sep 19 17:14:02 EDT 2002 | davef

Comments are: * Use an eraser if the surface of Au is not clean, but make sure the eraser has no/low ionics (such as sulfur that is a common additive for rubber). * If the plating surface required eraser to remove the top surface, the plasma normally

Raw PCB packaging

Electronics Forum | Mon Feb 20 16:31:09 EST 2006 | GS

Hello Gents, ..............several questions about the subject: Q1)Are there any standard regulating the subject ? Very few infos found on IPC. Q2)Which materials are suggested to seal (Bag) the PCB ? Q3)Is it necessary the vacuum sealed bag ? if

Safety equipment for servicing solder wave

Electronics Forum | Thu Aug 21 09:05:07 EDT 2003 | davef

Use a cartridge that's approved [conform to OSHA 42 CFR 84] to provide respiratory protection against organic vapors, chlorine, hydrogen chloride, sulfur dioxide, chlorine dioxide, and hydrogen fluoride with a P100 particulate filter which is effecti

Lead Free Immersion SIlver PCB-->Creeping Corrosion

Electronics Forum | Thu Sep 03 12:03:52 EDT 2009 | Sean

Hi All, I have few questions about creeping corrosion that potentially happen on lead free immersion silver PCB as below: 1) What test that we can conducted to verify whether the failure we seen is due to creeping corrosion? 2) I heard that lead fr

HELP! Plating issue on chassis

Electronics Forum | Fri May 21 12:24:21 EDT 1999 | KA Stillings

I normally handle the soldering issues for this facility but a question was asked of me -- What the H@## is this stuff and what is causing it? Was wondering of I could get some input from any Guru on plating issues. Need info ASAP!!!!!!!!!!!!!!!!!!!

External Factors to be controlled during assembly

Electronics Forum | Thu Sep 27 19:52:28 EDT 2001 | davef

All of the discussion of "environmental controls" are a matter of degree, dependent on the requirements of the product that you manufacture. For example: shops assembling under-the-hood products have different requirements than shops making garage d

About the PCB gold finger contamination.

Electronics Forum | Thu Sep 19 21:23:42 EDT 2002 | davef

I'm not saying that an eraser will necessarily work. What I'm saying is that some erasers may cause more trouble than the eliminate. Look here http://aic.stanford.edu/jaic/articles/jaic28-02-003_2.html We prefer a brand called Ruby Red. The "ole

Re: Sodium Chloride (NaCl)

Electronics Forum | Mon Mar 01 22:24:53 EST 1999 | Dave F

| 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: When so

Re: Tin-Lead thickness on PWB's/Let's Hear More

Electronics Forum | Wed May 27 21:05:30 EDT 1998 | Steve Gregory

Hey yooze guys! Enough of the jokes between you and Earl (GRIN), let's get back to the topic...well, okay... you can tell a few more...(but good ones, 'kay?) Anyhoo...I'm not sure if ya'll are on the IPC Technet list or not, I've not seen any posts f

Moisture absorbtion in circuit boards

Electronics Forum | Tue May 21 20:27:05 EDT 2002 | davef

No N2. We could not fix a benefit for N2 in our minds. Just fold the excess bag material over to expell most air and then seal the bag. [Have you assessed the benefit of N2?] F Monette can tell you stories about little versus more pressure. If he

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