Electronics Forum | Tue Mar 27 15:49:54 EDT 2012 | bradlanger
Try Re-seating the card that connects the ISA slot from the computer mother board to the I/O Dpram card. It may be worth checking the ISA card for bad solder joints. The computer mother board could be going bad. Check for vented electrolytic caps. Ho
Electronics Forum | Thu Mar 29 08:28:28 EDT 2012 | williamaxler
In the IPC-A-610E standard QFNs are classified as BTC (bottom termination components). Most QFNs do not have a solder-able surface on the outside of the part. Usually the lead that you can see on the outside is copper and classified is not solder-a
Electronics Forum | Fri Apr 06 11:10:43 EDT 2012 | cadco
We are a PCB design house/CM and we have found that if you elongate the QFN pads to the outside of the part by .025 to .030 you then have the opportunity of doing touch-up manually with a soldering iron should there be a voiding issue. This would hav
Electronics Forum | Fri Apr 20 01:42:37 EDT 2012 | thmeier
If you extend the pads you get the effect that the solder below the component is pushed to the outside land which results in a very low standoff of the component, deteriorate the overall quality of the solder joint. Hot air (pencil or some of the sem
Electronics Forum | Mon Apr 02 17:51:02 EDT 2012 | swag
Almost sounds like a part fell in the pot, exploded and burned into powder. We had a part get into our pot somehow and produced powder dross + other contaminates (no solder balls, though). The ring around the pot was very difficult to remove but wa
Electronics Forum | Thu Apr 12 17:49:35 EDT 2012 | rodrigo
I've done the Fuji flush. It does the same thing. We can not load proper again because it does not communicate with either the F4G or MCS/30. I was able to boot into mechanical mode at one point but now I can not do that either. This thing is drivi
Electronics Forum | Thu Apr 12 13:02:20 EDT 2012 | tec30
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Electronics Forum | Wed Apr 18 10:05:24 EDT 2012 | dyoungquist
We started with SN100C from the very beginning when we purchased our selective solder machine. It has been working well for us. I can't speak to what happens when changing over to it, but I've heard of many companies using SN100C for selective sold
Electronics Forum | Fri May 04 08:37:45 EDT 2012 | waveroom
SN100C is being used by 95% of our customers over the SAC305. The main reasons are Cost big savings easily $10.00 lb, nice shiny solder joints good for quality inspection. Very few people are using SN100C in SMT Due to increased temperature requireme
Electronics Forum | Thu Apr 19 13:12:48 EDT 2012 | hegemon
Funny. Can't imagine an engineer without some clutter in the workspace. While I "get" the 5S paradigm, for myself it would create a sterile, souless, and unappealing place to work. Everything in its place and a place for everything... The principle
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