Electronics Forum: ionics contamination 1

IONIC CLEANLINESS SPEC FOR BARE PWBs

Electronics Forum | Sun May 09 16:25:00 EDT 2004 | gabriele

Military and most commercial standards requires > post-soldered boards to measure less than 10 > �g/in of NaCl (14 when using an Omegameter, 20 > on a Ionagraph, and 37 on a Zero-Ion). > > As Dave > stated, 6.5 �g/in of NaCl is called out in >

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: Approach To Contamination Testing Of PCBs

Electronics Forum | Sat May 16 19:31:27 EDT 1998 | Graham Naisbitt

Gentlemen, Please consider that ionic testing is designed only for detecting ionic contaminants. Yes there are instances of non-ionic contaminants that cause premature circuit failure. However, more importantly the prevailing specs are less than adeq

Mix of Lead free & Leaded washing in same machine

Electronics Forum | Mon Aug 27 22:16:03 EDT 2012 | ilanhovan

Hi, my supplier is using the same Aqueous machine to clean the boards for 2 different customers. My product uses the chemistry of leaded clean flux meanwhile the other product uses the chemistry of lead free with no clean flux, however that product r

Corrosion

Electronics Forum | Mon Oct 06 17:16:02 EDT 2003 | pjc

Yes, the OmegaMeter and IonoGraph are test equipment to measure ionic contamination. Either of those units should enable you to sort your inventory boards. for more info about this equipment, go to: www.cooksonee.com/products/scs/CoatingSystems/Ionic

soldermask color change around vias

Electronics Forum | Fri Jun 07 11:10:08 EDT 2019 | teejsd

We also have a Foresite C3 for spot testing for ionic contamination. I didn't use it at this spot, but used it some other spots around the PCB that showed this color change and with our C3 we were passing IPC standard for ionics. But I was wonderin

Ionic Contamination Tests

Electronics Forum | Fri Sep 28 04:49:09 EDT 2007 | gregoryyork

Just a shame that the HASL fluids that are used contain Hydrobromic or hydrochloric acids or a mixture of the two and are full of strong wetting agents that are NON IONIC so the IC test results mean very little as they are checking for Ionics only. P

Electromigration Testing

Electronics Forum | Wed Aug 18 09:20:22 EDT 2004 | QE

Davef, Sorry for the late response. I was trying to gather more info. The group with low ionic contamination levels came from one of our other facilities. We want to outsource more of our product due to increasing demand. Both groups use the same

Calculating PCB surface area

Electronics Forum | Fri May 17 03:04:15 EDT 2002 | Mike Konrad

This conversation reminds me of the old �How Many Engineers Does It Take To�� joke. We manufacturer the ionic contamination (ROSE, SEC) testers and I am not aware of anyone that performs such exacting surface area calculations. Most people use th

Ionic Contaminate Testing (time or auto terminate)

Electronics Forum | Thu Sep 02 11:31:19 EDT 2004 | kmorris

Hi: I am wondering what others are doing that use a Static Ionic contaminate test (e.g. Ionograph/Alphametals) in relation to time. Our Ionograph has the option of setting a test time, or setting it to auto-terminate when there is no change in resis


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