Electronics Forum | Thu Jan 15 15:13:50 EST 1998 | justin medernach
| I have a problem! The solder on my pc boards look great comeing out | of my reflow oven. They go thrue the rest of the prossese | and at the end at the qc station it's cold or whitish or gray not shiny. | does any one have a idea on how to correct
Electronics Forum | Wed Feb 28 19:44:50 EST 2001 | pzohbon
I am having problems with voids in our soldering process. I believe it to be the fact that we use a no clean flux without control on how the boards are handled (gloves, procedures, etc.) Does anyone have suggestions on the appropriate place to start?
Electronics Forum | Tue Nov 17 03:04:38 EST 1998 | Charles Stringer
For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the wave solder and
Electronics Forum | Tue Dec 17 11:01:24 EST 2002 | Tim Marc
Hello all, One of our PCB manufacturers coated a through hole connecters vias with solder mask. The only IPC references that comes close to describing this problem is 2.9.2 Registration to holes, and subsequent specification 6.3.1 PTH � Vertical fil
Electronics Forum | Sat Dec 18 15:23:05 EST 2004 | grayman
We used to add flux on a "expired" solder paste but we discontinued as there are many problems and customers complaints coming from our American customer. Like unwetted solder pads,dull and cold solder and many others. The profit is really ok but qua
Electronics Forum | Mon Jun 12 06:45:10 EDT 2000 | kim ji tae
Hi! Thanks all who upgrade these pages. I have some questions. Is there any answer? I do double-sided reflow solderig, with 0.4% AG solder cream. with AU finished pcb. First I do reflow solder bottom side where 0.5pitch TQFP locates. Second I do re
Electronics Forum | Wed Dec 23 03:33:14 EST 1998 | Charles Stringer
Can anyone recommend a solder stop that can be applied by our PCB supplier. Our current material form Tamura Kaken is causing problems. The material should be capable of withstanding 1 Surface mount IR reflow cycle and 1 wave solder cycle. We need t
Electronics Forum | Mon Jan 19 20:25:52 EST 1998 | Steve Gregory
| I have a problem! The solder on my pc boards look great comeing out | of my reflow oven. They go thrue the rest of the prossese | and at the end at the qc station it's cold or whitish or gray not shiny. | does any one have a idea on how to correct
Electronics Forum | Wed Apr 05 23:56:02 EDT 2000 | angela
Recently we have serious problem of our 0.5mm pitch QFP solder bridge. I check the viscosity of the Litton Kester paster. It's roumd about 700 is it too low. And do you have god solution about it? thanks alot
Electronics Forum | Mon Aug 04 16:20:35 EDT 2008 | patrickbruneel
After analyzing the pictures I don't think the solder balls are caused by the solder mask. If the problem would be solder mask related the solder balls would only show up on the solder mask but there are also solder balls on the plastic tabs. To me i
