Electronics Forum | Thu Oct 11 07:06:43 EDT 2012 | davef
Remember when the whole 'lead-free' thing first hit us in the stomach? Companies were selling swabs that could detect the presence of lead, which we purchased in hopes of determining if the solderability protection on components was not leaded. I d
Electronics Forum | Thu Oct 11 13:10:04 EDT 2012 | anvil1021
We are experimenting with void control in reflow and have had pretty good luck for the most part in attaining Class lll IPC spec. but we have seen a sudden increase in voiding on a specific product and I was wondering if anyone has seen this extreme
Electronics Forum | Mon Oct 15 08:24:24 EDT 2012 | scottp
You could pay the extra to have the microvias plated shut and planarized. If your voids are larger than 25% of the BGA joint area then I would suspect a solderability problem. Either the board plating or a solder paste problem. If they're less tha
Electronics Forum | Tue Oct 16 11:02:05 EDT 2012 | terry_zhang
Has anyone tried to immerge the PCBA(with ICs, resistors, capacitors,connectors populated) into IPA for 1hr? The temperature of IPA is about 60~70C, is there any damage or degrating found for PCB and the components? Is there any related information s
Electronics Forum | Sat Oct 20 14:24:16 EDT 2012 | davef
Not sure why you'd want to immerse an assembled board in 60-70*C IPA for an hour, but I doubt there is much published material on the topic * IPA is toxic * IPA is flammable at room temperature and heating IPA to 60-70*C only makes it more so * There
Electronics Forum | Tue Oct 16 13:30:49 EDT 2012 | sarason
Go to my page, it has a links list. You could easily spend months reading the material. This site has a fair bit of specific information. SMT magazine is a good light read on SMT topics. http://members.iinet.net.au/~sarason/Links.html regards saras
Electronics Forum | Tue Oct 16 13:40:07 EDT 2012 | surajdn
and are there good chances of open contacts and solder errors? and are they cheap? (im talking about the manual pick and place machine) and yes... i also wanted to know what are skills i must master to be able to work with smt. and where can i lear
Electronics Forum | Tue Oct 16 16:27:30 EDT 2012 | dyoungquist
If you want to learn about SMT try the book, "Surface Mount Technology - Principles and Practice" (Second Edition) by Ray P. Prasad. It is 15 years old but contains much of the information you are looking for. You should be able to find at least a
Electronics Forum | Sat Oct 20 10:06:36 EDT 2012 | surajdn
ok!... thanks a lot... Got some idea.... the resources are really great... thanks a lot! I couldn't find that book though. But there are some books that are on the net but not available in India(where I live). Thanks a lot to all of you. If you fin
Electronics Forum | Wed Oct 17 02:07:23 EDT 2012 | andras
Hi, Just for info. Hard to buy vibratory feeders on ebay: http://www.ebay.com/itm/380403397600 I bought two of them and perfectly fits to CSM66/84 (and should Topaz also ??). The guy is very slow, but finally sent me the goods. And is worth the mone
.png)
