Electronics Forum | Thu Oct 05 16:04:00 EDT 2006 | GS
I am not expert, just my comment, the total ionic contamination allowed after SMT, by using No Clean process, theoretically it should be close to Zero. Any way the Standard IPC-JSTD-001 allows 1,56 ugr NaCl/cm2 for the final Printed Board assembled.
Electronics Forum | Thu Oct 17 17:29:46 EDT 2013 | lordofpiggies
Hello. We are building a CCA which has a silicone-based adhesive whose purpose is to bond the bottoms of multiple LED displays to heat sinks. Our customer wants the CCA to be tested for ionic residues per J-STD-001, but we are hesitant to test the
Electronics Forum | Fri Jan 08 12:27:55 EST 2016 | aqueous
The most common method is a R.O.S.E tester. They have been around for 30 years and are an industry standard for ionic contamination (flux and other residues) testing. Manufacturers include: Zero Ion www.aqueoustech.com Omegameter / Ionagraph http:/
Electronics Forum | Tue Nov 07 00:33:40 EST 2017 | aqueous
If no-clean flux is reflowed correctly, many of the activators are encapsulated within the resin residue left behind after reflow. An ionic contamination test cannot differentiate between ionic residue that was encapsulated (not harmful) and residues
Electronics Forum | Thu Apr 22 04:55:42 EDT 2004 | Richard
Have you tried using Concoat MUST II solderability tester to test on the component terminal are of good solderability. Non-wetting may occur due to oxidation or contamination on component terminal. So for immediate response to you problems is to used
Electronics Forum | Fri Apr 04 09:28:59 EST 2003 | davef
Q1: Anyone has any ideas on how this post-SMT reflow solder joint could have changed to whitish joint? A1: Dunno. You need to tell us more. For instance: * What is the appearance of this white residue? [eg, glassy / coarse, milky colored / opaque,
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
Electronics Forum | Thu Nov 04 19:51:28 EST 1999 | John
Thanks folks. The current vendor is doing an alcohol wash, top and bottom, then performing an ionic test on 100 boards. I'm not to confident in the testing because the readings for a "clean" board are 25 ugm/sq in and a "dirty" board are 40 ugm/sq in
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
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 �
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