Electronics Forum | Fri Mar 04 17:19:31 EST 2005 | davef
Mrduckmann2000: Why do you want to do this? * Removing a non-washable / peelable temporary solder resist [TSR] is going become very tedious, because they do not release well from small / tight / isolated features. * Clay from washable resists will
Electronics Forum | Fri Aug 05 11:32:29 EDT 2005 | saragorcos
Hi Sandy, Here are some suggestions for an optimum cleaning process for cleaning under BGAs if they are assembled to the board to add to the great tips Shean already listed: - Use a good saponifier w/ DI water - an effective saponifier will be able
Electronics Forum | Wed Jan 04 16:56:25 EST 2006 | dajesk2003
We have an Ionograph 500 M SMD II tester. A couple of months ago, it began failing bare boards at a very high rate. We use 10ug/in2 as our standard. Typically we would fail, maybe one board every 6 months. In the past two months, at least 15 boar
Electronics Forum | Fri Jan 06 09:15:34 EST 2006 | sarar
I would suggest that it would be helpful to perform ion chromatography analysis on some of the boards that have failed your ionograph tests as well as some boards that have passed. This will tell you exactly what ionic species are present on the boa
Electronics Forum | Tue Jan 17 10:53:05 EST 2006 | sarar
Hi Steve, I work for an analytical laboratory that specializes in ionic cleanliness, and we have found through the variety of cleanliness issues we encounter that the Envirosense cleaning chemistries are very effective also, so you might want to add
Electronics Forum | Sun Feb 26 21:48:28 EST 2006 | Mike Konrad
Hi GS, Just a clarification� No-clean does NOT equal no ions. It equals less ions (at best). Automatic R.O.S.E (Resistivity Of Solvent Extract) testers are commonly used to detect ionic contamination from no-clean applications. Your comment rega
Electronics Forum | Tue Jun 06 12:42:24 EDT 2006 | samir
Wave flux, although I've seen it used successfully in my past life, is not such a good idea to use as a rework/touchup flux. Wave flux needs to be heated to certain activation temps which won't be repeatedly achieved with a manual soldering process.
Electronics Forum | Thu Jul 06 16:00:11 EDT 2006 | samir
Ionic Cleanliness Testing: IPC-TM-650, Test Method 2.3.25, Section 5, "Dynamic Extraction Method", is the most commonplace method in the industry to test YOUR PCBA's for cleanliness. Run it through your process as normal, and send it out for testin
Electronics Forum | Thu May 31 11:26:33 EDT 2007 | gsala
Tnks Patrick, additional infos..... we are just playng with different NC solder wires L-F, the best results in terms of solderability (faster solder flowing, holes filling up) it seams are coming from an ROM1, as we know, according to J-STD-004, or
Electronics Forum | Tue Jun 05 11:52:01 EDT 2007 | rgduval
We just tested AMTECH's LF4300 with good results. Excellent reflow/profiling capabilities, good processing. And decent cleaning. I say decent cleaning, because we did run into a small issue. While using Qualitek's LF paste, we experienced a lot o
