Electronics Forum | Sat Jan 17 17:42:07 EST 2009 | viresh
what is the impact if a solder paste is used after 24 hours after tawing time
Electronics Forum | Tue Oct 29 04:40:42 EDT 2019 | jags
how long i can keep pcba after bottom reflow soldering to top side reflow soldering. like 12 hours or 24 hour or 48 hours........Enig board. leadfree soldering with 10% flux
Electronics Forum | Mon Jul 12 20:26:10 EDT 2021 | stephendo
A test that I would like to see is, expose parts for 24 hours 40%-60% RH, 25C for 24 hours. Then seal with a HIC and minimum desiccant that Jstd 33 requires. Five to seven days later open and see if HIC says good but parts have excess moisture. I t
Electronics Forum | Tue Mar 30 15:29:39 EDT 2010 | davef
5000 hours, yeow!!! Salt spray testing "periods range from a few hours (e.g. 8 or 24 hours of phosphated steel) to more than a month (e.g. 720 hours of zinc-nickel coatings, 1000 hours of certain zinc flake coatings)." Look here: http://www.ancatt.c
Electronics Forum | Tue May 28 22:06:09 EDT 2002 | arcandspark
Two hours at 125 C will do nothing. IPC's new spec is 48 hours at 125C, the old spec I use to use for years was 24 hours at 125C. I do not have all the spec in front of me but if you reduce the temp to around 60C it can take up to 48 days. We use to
Electronics Forum | Tue May 28 22:06:18 EDT 2002 | arcandspark
Two hours at 125 C will do nothing. IPC's new spec is 48 hours at 125C, the old spec I use to use for years was 24 hours at 125C. I do not have all the spec in front of me but if you reduce the temp to around 60C it can take up to 48 days. We use to
Electronics Forum | Wed Feb 15 04:25:56 EST 2006 | der
one of the guys was baking a 672BGA . he mistakenly left the oven on over night so instead of baking for 12 hours at 125 degrees C, they got baked for 24 hours. Is there any detrimental impact on the BGAs or are they just well baked???
Electronics Forum | Fri Aug 03 05:11:36 EDT 2007 | coffee_12
I would like to know, if the solder paste for SMT is unpacked (the syringe is opened) and is stocked at room temperature, then when I should trash it. After 12 hours/24 hours exposure? Or any other suggested time? Thanks.
Electronics Forum | Fri Jun 01 04:05:25 EDT 2012 | grahamcooper22
If you think the root cause is excess moisture in the pcb then try to bake it for longer. Even longer then the manufacturers recommendation. It takes a long time for excess moisture to come out of a pcb. Try 24 hours , then 36 hours and see if there
Electronics Forum | Thu Oct 07 15:12:19 EDT 1999 | Scott S. Snider
| I am interested in seeing how some of you calculate machine utilisation. Currently this was calculated off against the uptime. I really believe there is a better way of doing it i.e if I were to calculate this against machine's capacities. Any feed
