Electronics Forum | Thu Jun 23 16:09:51 EDT 2005 | pr
Oh Yeah, I've had an AP27 I would say it just doesn't like your fid. Just click on the window in the bottom left and it'll go full screen (then click main menu to return). Check the easy stuff first, Make sure you have a consistant load (in the cente
Electronics Forum | Thu Jun 23 14:13:52 EDT 2005 | Frank
Luckily I haven't needed to do very many bottom side BGA placements. But I have also heard of trying to use a higher temp solder for bottom side only and your normal solder for the top side. This way the bottom side solder doesn't get hot enough to
Electronics Forum | Thu Jun 23 10:36:04 EDT 2005 | stepheniii
I think the single most important thing will be to maintain positive pressure in the room. All the air filtering will not be able to keep up if dirt is blown into the room everytime a door is opened. The next would be to control as much as possible,
Electronics Forum | Thu Jun 23 10:49:46 EDT 2005 | slthomas
Your HVAC contractor is probably the guy to talk to (they can hook you up with a variety of air handling and filtration systems depending on the level of cleanliness you want). Another thing you can do is reduce the amount of dust you bring in and/
Electronics Forum | Thu Jun 23 12:59:09 EDT 2005 | jdumont
That was a great article. Luckily for us we dont build at the wafer level. Only PCB assembly through surface mount and wave. I like the positive pressure idea. Im going to contact the HVAC guy and see what he thinks. I think that just being in a clos
Electronics Forum | Mon Jun 27 09:38:30 EDT 2005 | Bob R.
What problems are the quality people seeing? I hope they aren't expecting a toe fillet. QFNs are typically cut from an array after plating. This leaves exposed copper on the sides of the part. We'll often see smearing from the sawing process that
Electronics Forum | Wed Jul 06 12:04:39 EDT 2005 | sarag
Jason, If you have any pictures of this phenomena that might be helpful for the forum to see in helping diagnose your problem, you can send them to me and I can post them on my website to view. My email is sg_foresite@residues.com Sara Gorcos Fores
Electronics Forum | Fri Jul 15 13:58:32 EDT 2005 | seaK
Our production is putting QFN40 and QFN56 package on board. With 80% opening on terminal, 40% on thermal pad, we found QFN56 100% forming toe fillet, but it does not work out the same to QFN40. We suspect it's because of the weight of component.....
Electronics Forum | Fri Jun 24 12:03:58 EDT 2005 | ehess
I am looking for some info on our Kenco Industries, Ionic Tester. I've searched the internet, but cannot find them. Tag says Atlanta, GA, but search brings up nothing. Does anyone out there have one of these, and do you know where I can get parts?
Electronics Forum | Sun Jun 26 04:08:40 EDT 2005 | fastek
If you have a virus protection software in place it is likely slowing your system down to a crawl. Disable it and see if your results are better. You can also do a ctrl+alt+del. Go to "Processes" and take a look at what is bringing down your speed. H
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