Electronics Forum | Thu Sep 05 22:36:38 EDT 2013 | davef
Yes, providing your: * Inbound material does not compromise your process. * Soldering processes apply the proper amount of flux and activate it properly * Material handling does not contaminate your boards Recognize that the IPC requirements of less
Electronics Forum | Wed Nov 29 21:00:02 EST 2017 | truthseeker
Thx for following up. We have a small PCB in a defense application that has copper sulfide issues. We are using Ion chromotagraphy to track down varions ionic species including sulfates. Your post was a aha moment for me. We have a sample being analy
Electronics Forum | Fri Jun 07 11:17:14 EDT 2019 | teejsd
Unfortunately for me, I can't say whether those balls were flat on 1 side or not -- sent this board for x-section to see if we had CAF, since my ionics testing wasn't breaking IPC standard. Unhappily my x-sect results were inconclusive. However I d
Electronics Forum | Mon Oct 11 15:06:39 EDT 1999 | Dave F
| | Thank you all for your replies. I guess my age in this industry is showing. This military spec. does not appear to be in existance. So, let me make my request a little more to the point: | | | | Is anyone aware of a specification specifically
Electronics Forum | Sat Sep 25 07:07:02 EDT 1999 | Brian
| I need a memory jog. What is the term for the growth of conductive contamination after a board is in storage or field? | There are several different mechanisms which can cause this. In reality, ionic contamination is the root cause for many of the
Electronics Forum | Wed Jan 27 21:02:53 EST 1999 | Dave F
| i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated temperatu
Electronics Forum | Thu Jan 28 08:58:10 EST 1999 | Peet
| | i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated tempe
Electronics Forum | Fri May 15 10:51:12 EDT 1998 | Justin Medernach
| We understand that testing for ionic contamination and surface insulation resistance measure different properties. We assemble printed circuit boards for other companies. We will not get combs on 90% of the boards that we assemble. | We have no c
Electronics Forum | Mon Nov 22 17:32:34 EST 2004 | davef
Assemblers often assume that the board and component suppliers provide them with clean product. This was not a problem when everyone used water washable fluxes, because the water washing used to clean the flux residues also cleaned the board and com
Electronics Forum | Thu Nov 20 19:47:04 EST 2008 | davef
Steve In response to your comments: SP: I'm not sure I completely agree with you regarding the smoke screen factor. I have found many times confusion around bulk ionic testing comes down to people not understanding your point about it not being a "
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