Electronics Forum | Thu Mar 29 08:52:59 EDT 2007 | realchunks
Hi George, Depending on your product, wave soldering twice is not all that bad. Residues will be higher, but should only be cosmetic unless your product is sensitive to ionic contamination. You can set-up an alternate profile on your wave for 're-
Electronics Forum | Thu May 24 22:33:07 EDT 2007 | slthomas
By purchasing or leasing a DI system and supplying it for your final rinse, at least. You'll avoid some troublesome ionics on your boards that way. Kind of off topic, but are you filtering or boiling off your washer's waste water or are you sending
Electronics Forum | Tue Jan 29 13:51:24 EST 2008 | bbarton
Dave F....BOGUS BOGUS BOGUS What compatability issue could there possibly be if the flux is removed during wash???? Why on EARTH would you leave ANY WS flux residue on the board? A recipie for disaster! Beef up the cleaning process, test for contami
Electronics Forum | Mon Feb 18 15:47:42 EST 2008 | ck_the_flip
In theory, no clean flux residues are electrically benign...period. Here's a good test. Subject the board to some moisture/humidity, and have your circuit designer ohm-out any areas that may be affected by conductive material. Option B: Have a la
Electronics Forum | Fri May 16 15:10:28 EDT 2008 | arminski
hi davef, thanks for your kind replies...i have a batch aqueous cleaner in my process...but we are going to have AS9100 Audit 3rd quarter of this year...do I need to purchase a tester? right now we are sending sample boards to a 3rd party company bu
Electronics Forum | Mon Jun 16 16:18:44 EDT 2008 | dphilbrick
We have used good industrial dish washers in the past. We washed very dense SMT boards with mulitiple BGA's. they always passed Ionic tests. You can buy these for as little as $500. The less expensive ones won't hold up to 140F water and suponifier b
Electronics Forum | Sun Sep 07 17:16:57 EDT 2008 | gregoryyork
OK Pizza it is then, here goes. Dewetting of Ni/Au pads, paste favouring the Tinned component lead hence excess paste wicking on top of the components. Reason is EITHER Nickel migration into the gold due to high levels of Ionics from poor rinse OR mo
Electronics Forum | Tue May 25 11:37:50 EDT 2010 | davef
Where on the assembly is the dewetting occurring? Factors that influence dewetting usually involve non-ionic contamination such as: * Residues from board manufacture including silicone surfactants from solder resist & HASL rinse contamination * Comp
Electronics Forum | Wed Jun 30 19:31:40 EDT 2010 | jry74
Tim, try and incorporate an inline wash system. We use one with a surfactant and it cleans the "NO CLEAN" fluxes well. If you dont have an inline system, you can manual clean the boards with an surfactant and IPA. You can also do an ionic contamin
Electronics Forum | Wed Jul 10 08:50:02 EDT 2013 | mobe1969
Hi SMTnet Members I'm looking for some help with my Westek ICOM500 Ionic tester. It has been sitting for a while. We want to get it up and running. I don't have any tools with this tester. Do you know what material I need to get this to work? Calibra
