Electronics Forum | Tue Feb 17 18:17:28 EST 1998 | John Wilson
I am looking for any information or testing data done on the amount of weight that can be held by a bga package based on size of the solder sphere and number of spheres. I am reflowing components with a bga package on the opposite side and looking f
Electronics Forum | Mon Dec 17 14:16:44 EST 2007 | realchunks
This is funny. Poeple giving answers to a question that isn't specific. What if the shorts he is having are on the top of his board, caused by flooding or Omega wave too high?
Electronics Forum | Wed Jun 21 09:12:42 EDT 2017 | emeto
I would start with checking the flux amount and trace and the thermal profile(preheating is important) for this assembly. Then I would consider changing to another flux and run it again.
Electronics Forum | Sat Jun 24 07:48:05 EDT 2017 | ranap121212
Thanks from your answer. A few days ago the supplier told me about these rolls. Now I am waiting for them and I will make tests. Maybe I will also try to reduce the ejection speed but this will lengthen the process
Electronics Forum | Mon Dec 17 12:06:58 EST 2007 | pjc
5 Steps to Eliminate Bridges: 1. Establish (wave) Parallelism First and foremost, you must establish board-to-wave parallelism. This is the prerequisite to any wave solder process control. For an understanding of the power of this approach go to ht
Electronics Forum | Tue Feb 29 21:53:46 EST 2000 | Kelvin Chow
Dear Robert, On PBGA assembly, BGA sphere shrinkage number depends to the following factors, a. BGA Sphere size (before reflow) b. Solder mask opening diameter As far as I know, no formular has been established yet. Most of my friends just collect
Electronics Forum | Tue Feb 29 21:53:46 EST 2000 | Kelvin Chow
Dear Robert, On PBGA assembly, BGA sphere shrinkage number depends to the following factors, a. BGA Sphere size (before reflow) b. Solder mask opening diameter As far as I know, no formular has been established yet. Most of my friends just collect
Electronics Forum | Thu Jun 27 11:22:03 EDT 2002 | robbied
Hi there. We have had an out of control reflow oven that has allowed its temperature to fluctuate by up to +/- 20 deg C from set point in very short periods of time. We found the root cause of the problem and fixed it, but by then we had already run
Electronics Forum | Fri Jun 28 04:10:24 EDT 2002 | robbied
Great, now at least I have an explanation of sorts. Thanks, Dave.
Electronics Forum | Mon Dec 17 13:58:54 EST 2007 | ck_the_flip
I made my own wave measuring device using KIC2000 system. KIC2000 has automatic wave detection, so now I have a profiler for both reflow ovens and wave solder. The delmat carrier only cost $500. A guy, Samir, from this forum gave me the idea, actu
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