Electronics Forum | Wed Oct 20 10:41:22 EDT 1999 | Eric Lerz
Our company (assembler and user) has experienced some board problems relating to warpage and solderability. The manner in which they are packaged by our fabricators and stored in our stock prior to assembly has been questioned (as one of many factor
Electronics Forum | Thu Apr 12 00:56:20 EDT 2007 | Jani
Our SMT production and storage area is air-conditioned, constant temperature is maintained but the humidity is not controlled , the raw SMT material is stored in a "Drier" cabinet, but since we assemble hybrid SMT and thru-hole PCB assemblies, the SM
Electronics Forum | Sun Nov 08 17:04:26 EST 2015 | ttheis
Thank you very much for sharing this information. It is difficult to gain knowledge in this area independently. I'll contact Kester for information on adjusting the flux density and which "thinner" to use since I am using their flux. I really like
Electronics Forum | Thu Dec 03 15:30:00 EST 2015 | ttheis
We've started off with Kester 951 'no-clean' so far which is alcohol based I believe. It seems to do very well with foaming, activation and low residue, but if we can move to water based and get good results that would be great. The 951 flux and thin
Electronics Forum | Thu Apr 12 22:00:58 EDT 2007 | davef
Search the fine SMTnet Archives, for instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=46687
Electronics Forum | Thu Dec 03 15:38:35 EST 2015 | ttheis
Thanks for the tip! Do you find the boards require any cleanup after exiting the wave with the Superior 420-XF-LF?
Electronics Forum | Thu Dec 03 15:41:09 EST 2015 | proceng1
We do run them through an Aqueous washer, but I don't see excessive deposits or anything before washing. And our wash is just heated DI water.
Electronics Forum | Thu Dec 03 14:37:53 EST 2015 | proceng1
Are you running a water or alcohol based flux? We run a water based product and it stays in the tank with the stone all week and is emptied and cleaned at the end of the production week. Never once have I stored the stone in thinner and I've never
Electronics Forum | Thu Dec 03 15:34:57 EST 2015 | proceng1
Superior 420-XF-LF is what we use. When we switched, it took some time of just running it through the stone before we got the optimal performance. Especially when going into the clean and dry tank on monday morning, we usually let the fluxer run for
Electronics Forum | Thu Apr 12 13:04:47 EDT 2007 | slthomas
Handling requirements of all classifications of moisture sensitive devices is found in J-STD-033. It really isn't an issue for most parts unless they're going to reach reflow temperature again, which is unlikely unless you're removing a nearby compo
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