Electronics Forum | Wed Aug 26 05:22:59 EDT 2009 | grahamcooper22
Hi Sergey, I agree with your probable cause. Maybe if you still have a component you can bake it before reflow to DRY it. Then if the problem doesn't happen in reflow you have surely proved the cause. Consult IPC JEDEC 33B spec for storage and Drying
Electronics Forum | Wed Aug 19 18:28:01 EDT 2009 | ratsalad
I'd like to ask a question. Have you determined where all those solder balls are coming from? I even see them on top of U40 and U15. This seems like a dumb question to me considering the size of the part (and having seen pictures of only one boa
Electronics Forum | Wed Aug 26 03:21:00 EDT 2009 | sergey2007
Hi Graham, the MSD level of the component is 3. I am not sure that my customer properly stored the component before the soldering process. And I am not sure that it was dried at all. The customer says they did everything that they had to, but I just
Electronics Forum | Thu Aug 20 18:20:21 EDT 2009 | joeherz
Sergey, With that many leads and contact surface area points, it doesn't make sense that the part would move as it has without a gust of wind.... What is your confidence that you don't have an MSD issue on this part. Being that it is a TQFP, it's
Electronics Forum | Thu Aug 20 08:23:23 EDT 2009 | ratsalad
One diagnostic tool that I have found useful in the past is the "hot plate test". Place suspect components and/or PCB's on a hot plate and turn it on High. Then observe. Granted the conditions on the hot plate are not the same as in a reflow oven,
Electronics Forum | Tue Aug 18 10:11:04 EDT 2009 | grantp
Hi, Yes, I think this sounds like a form of tomb-stoning, and we used vapor phase until it ended up driving us totally nuts trying to deal with tomb-stoning. We tried everything, and all kinds of stencil apertures. Vapor phase is an amazing process
Electronics Forum | Fri Jan 19 14:34:37 EST 2007 | Al Coholic
Add solder.
Electronics Forum | Tue Jan 16 07:22:21 EST 2007 | adamp
We are using composite pallets for our boards. Regards Adam
Electronics Forum | Mon Jan 22 02:23:47 EST 2007 | adamp
Thx guys, I'll check everything you mentioned, including solder pot, and solder feeder sensors.
Electronics Forum | Mon Jan 15 18:20:11 EST 2007 | greg york
are you using composite pallets in the wave or oil/wax around the pump impellar? cheers greg
