Electronics Forum | Mon Aug 22 11:50:02 EDT 2011 | rway
Yes, but even high force probes are not a cure-all. You still get flux build-up over time which can cause contact issues. The best way is to use a low residue flux in the wave to minimize what's left on the pcb post-wave.
Electronics Forum | Fri Mar 23 03:41:19 EDT 2012 | grahamcooper22
try Almit Sn62 HM1 RMA V14L ....its the best no clean lead paste for wetting...I sell it and it has solved wetting problems many times when users have used other pastes
Electronics Forum | Fri Mar 23 10:00:38 EDT 2012 | isd_jwendell
I am a big fan of AIM SnPb solder paste. I currently use NC257-2 (no-clean, 89.5%), and recommend you include it in your evaluations.
Electronics Forum | Thu Jan 17 20:17:55 EST 2013 | duchoang
We have got lots of voids at ALL LGA. Anyone has ideas to get rid of this issue or just minimize the size of voids ?. With the same paste, same reflow oven, looking good profile, we don't have that problem with BGA. Thanks.
Electronics Forum | Wed Feb 20 11:32:41 EST 2013 | emeto
Hi, in my case 2N is the minimal force I can use, so I will use it for most of the QFN we place.
Electronics Forum | Wed Jun 12 13:48:44 EDT 2013 | danselness
daveF - thank you for your reply. We ave tried both the 90 and 180 degree rotation in addition to other solutions mentioned in previous post but with no or minimal success.
Electronics Forum | Wed Nov 20 10:02:54 EST 2013 | dekhead
R)... This will be primarily seen in the "Y" direction with minimal effect in "X". It is possible that one of the chase rails is not locked (spring-loaded lock on rear), and changing position during screen load. http://www.dekhead.com
Electronics Forum | Wed Jul 09 09:01:22 EDT 2014 | rrosera
Does anyone have any experience with using padded static bags to minimize damage to boards during handling and storage? Does anyone recommend a specific brand or type?
Electronics Forum | Wed Aug 03 10:11:22 EDT 2016 | swag
Rub the fid with an erasure and it might have better contrast. Minimize the search box area if your software allows.
Electronics Forum | Mon Sep 23 01:28:13 EDT 2019 | sssamw
Cannot understood your problem very clearly, please check IPC standard on QFN and its mfg process, also check the QFN supplier's recommendation, so can minimize the bridge.
