Electronics Forum | Wed Sep 05 08:00:37 EDT 2007 | davef
We agree with Doug. Your board needs to be designed with the QFP at a 45* to the wave with scavanger pads in order to wave solder it. Otherwise if you wave solder it, you will need to hire an additional rework person.
Electronics Forum | Thu Sep 13 11:01:39 EDT 2007 | cyber_wolf
Fuji specs out Omega 66 grease for the solenoid sliders on older CP machines. These solenoids run hot. Its interesting to me that this grease is designed for extremely low temperature applications. Whats up with that ? http://www.omegaoil.co.jp/ind
Electronics Forum | Mon Oct 22 08:54:27 EDT 2007 | rgduval
Michael, You're right, of course. A major mis-type on my end. What I meant to say is that no-clean fluxes are designed to not _require_ cleaning to meet industry cleanliness standards. Cheers ..rob
Electronics Forum | Mon Oct 29 14:49:45 EDT 2007 | mulder0990
That is what I was hoping to hear. I found one of that sort of design and I am looking into it now. No beels or whistles, just a couple of heavy duty brackets, some calipers, and a microscope. 7K seems like a good price for me.
Electronics Forum | Sat Nov 03 09:29:17 EDT 2007 | davef
IPC-9701, SMT Solder Joint Reliability Qualification and Performance Standard is an update of D-279, Design Guidelines For Reliable SMT PCA that includes BGA and PbFree
Electronics Forum | Tue Nov 13 08:11:16 EST 2007 | grantp
Hi, What is this unacceptable? Designed the PCB is much easer if this is possible, so it would be really good to know why via in pad is a problem in production. Grant
Electronics Forum | Fri Nov 16 18:08:32 EST 2007 | mika
So you are saying that 0.13 mm stencil thichknes and 20% reduction of the middle cooling pad is working for you? Just as I said.. Best Regards, Mika Ps. Keep in mind that the QFN is designed to do some heavy work, while enough "heat transfer" occur.
Electronics Forum | Mon Nov 26 09:45:46 EST 2007 | jseagle
My advice is the technology is not there unless your boards have been designed for laser soldering. Even then there are too many limitations to go into it. We tried a unit for almost a year and were never able to get consistent, not even going to m
Electronics Forum | Tue Dec 04 13:54:16 EST 2007 | realchunks
If you want to do this process, you should ask how to design the board for this process. Regular hole dimensions in the board will not work for this process.
Electronics Forum | Thu Jan 03 11:00:03 EST 2008 | patrickbruneel
As Dave said stainless steel can not be soldered using fluxes designed for electronics. The only way this could be done is to spot plate copper or tin where you want to make the solder connection.
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