Electronics Forum | Fri Nov 12 13:41:02 EST 2010 | scottp
I wouldn't count on solder bridging that kind of gap. I've never used solder preforms, but I wonder if that would be worthwhile to try?
Electronics Forum | Thu Jan 10 08:59:15 EST 2013 | rway
It appears the gold bleeding spans the gap between the plates, is this correct, or is it just the picture? If so, it should definitely be removed. Please clarify on what we are looking at.
Electronics Forum | Thu Oct 18 10:40:27 EDT 2018 | emeto
David, you can beat around the bush interpreting criteria, but without X-ray you will not see anything. This is the way to go to inspect this solder joints properly. Criteria is 75% fillet and than you have circumference, air gaps in there....
Electronics Forum | Tue Mar 26 10:30:28 EDT 2019 | pavel_murtishev
Hello, Could you please tell me if there is any industry standard specifying QFN to PCB standoff after soldering? Is any gap allowed? Browsing IPC-A-610, I have found nothing. Any input would be appreciated. Regards
Electronics Forum | Tue Dec 31 02:06:21 EST 2019 | sssamw
Yes, from the picture, it seems the gap between solder pad is very small, easy to have solder ball/solder bridge.
Electronics Forum | Tue Aug 04 04:20:36 EDT 2020 | bangir
Hi Chris, It's arround +/- 2MM. There was a gap if running pcb with thickness 1MM. The PCB position below the rail table.
Electronics Forum | Thu Feb 24 15:36:34 EST 2022 | dontfeedphils
Looks like a decent profile. Only recommendation I have would be to possibly try and high-temp solder the thermocouples rather than the aluminum tape/kapton, only because you can get air-gaps and inaccurate readings using the tape method on assemble
Electronics Forum | Mon Aug 14 05:45:16 EDT 2023 | dimamalin
First, this is the result of bad printer setup. Adjust knife pressure, PCB gap, separation speed, tooling, and stencil cleaning. Pay attention to the coating of contacts pad and height of solder mask of PCB.
Electronics Forum | Mon Oct 16 16:33:34 EDT 2023 | emeto
Based on these pictures, please check Board/Stencil co-planarity. Sometimes there might be a distance/gap between them helping this phenomenon(solder mask might be too thick). Also decreasing print speed, might help to mitigate it. You might be too f
Electronics Forum | Sun Dec 05 22:43:27 EST 1999 | dreamsniper
Charley, Though my reply is quite late, it might be a good info for you and i hope that this info could help or could provide you some views. Some companies practice at least 1 board gap, which means the length of the pcb you are currently loading,
