Electronics Forum: spill and solder (Page 4 of 104)

Re: solder balls and flux

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

Palladium finish and solder balls

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

Palladium finish and solder balls

Electronics Forum | Fri Jun 28 04:10:24 EDT 2002 | robbied

Great, now at least I have an explanation of sorts. Thanks, Dave.

wave soldering and solder bridge

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

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:58:03 EST 2000 | Dave F

Robert: On your balls: Solder suppliers make several "standard balls" and can advise you. On your cleaner: Recycling water / direct to drain? Most batch cleaner suppliers can advise you on recycling and filtering systems to keep you out of troub

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:58:03 EST 2000 | Dave F

Robert: On your balls: Solder suppliers make several "standard balls" and can advise you. On your cleaner: Recycling water / direct to drain? Most batch cleaner suppliers can advise you on recycling and filtering systems to keep you out of troub

wave soldering and solder bridge

Electronics Forum | Mon Dec 17 19:01:45 EST 2007 | bbarton

As someone with a LOT of experience with the "low cost" alternative alloys, primarily SACX, I have one simple question....Are these shorts a new phenomena? WAS your process in control, and all of a sudden it's not? If the answer is YES, take a look a

Re: solder balls and flux

Electronics Forum | Wed Mar 01 10:46:26 EST 2000 | Robert Hartmann

Kelvin, Thanks for the help. The actual opening size is .440 mm, but I think what you said makes sense. After discussing with the customer, it looks like it is the height which matters, more than the diameter. We have learned that the height of t

Re: solder balls and flux

Electronics Forum | Wed Mar 01 10:46:26 EST 2000 | Robert Hartmann

Kelvin, Thanks for the help. The actual opening size is .440 mm, but I think what you said makes sense. After discussing with the customer, it looks like it is the height which matters, more than the diameter. We have learned that the height of t

No solder and solder bridge after Wave solder machine

Electronics Forum | Thu Nov 17 03:34:51 EST 2005 | cangly

Hi, We have a board with over 100 chips (mixed size) and some long Connector DIP through out Wave solder with many issues of no solder and solder bridge, (using clean flux with bubble fluxer and Kester solder bar). Currently we tried to reduce the de


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