Electronics Forum | Mon Jun 21 16:11:41 EDT 1999 | John Thorup
| | I am finding that some of our IC's are coming from the supplier with the humidity gauge in the bag reading 10-20%. Has anybody done any tests to determine what humidty level in a package will cause problems during reflow? | Usually a proper m
Electronics Forum | Tue May 14 04:18:40 EDT 2013 | leardkattiya
Hi, Anyone here experienced in aqueous wash of chamber type? Here's the issues. We have top and bottom portion inside the chamber but unfortunately evaluation had indicate only top portion of the rack is able to clean the PCB clearly.
Electronics Forum | Sun Nov 22 09:36:17 EST 2009 | patrickbruneel
Dave, A low residue/No residue flux does exist that when an excessive amount of flux is applied it would only create a cosmetic problem not a reliability issue. The active ingredients are neutralized by the heat applied in the soldering machine and
Electronics Forum | Tue Nov 24 19:07:12 EST 2009 | gregoryyork
I agree Patrick many people blame the assembly fluxes when it is some other hygroscopic chemistry left on the bare PCB such as surfactents from the HASL process these will do exactly what the guy reported in his post fail then cool down and pass ever
Electronics Forum | Tue Sep 04 14:02:35 EDT 2018 | elsabudz
Hi Peter, I read your concerns regarding IC parts not packaged with desiccants and thought you may find our new Type 2 Humidity Indicator card of interest. Please visit https://www.clariant.com/type-2-humidity-indicator-card Thanks, Elsa
Electronics Forum | Mon Jul 16 15:47:52 EDT 2012 | davef
Here's what Desco says ... Humidity Indicator Card (HIC) A card on which a moisture-sensitive chemical is printed such that it will change color from blue to pink when the indicated relative humidity is exceeded. This is packed inside the moisture-se
Electronics Forum | Fri Dec 03 12:12:33 EST 2004 | mruzicka
Dreamsniper, We would need much more details about your process to help you to determine the source of voids. Type of paste, how long you leave your paste on stencil, your relative humidity, reflow profile, type of oven, oven environment (N2?) and so
Electronics Forum | Tue Jan 16 18:00:50 EST 2001 | mikestringer
Hi everyone I am in the process of reviewing our storage of SMT components. At the moment they are pretty much on open shelves in the factory environment. We endevour to reseal components labled 'moisture sensitive' in their original packaging, bu
Electronics Forum | Thu Aug 11 20:03:41 EDT 2022 | SMTA-69946521
I have a question about Humidity Indicator Cards (HIC) in sealed PCB packages. If a PCB package is temporarily opened where the HIC card indicates 20% humidity exposure and then the PCB package is resealed with a new HIC card. How is the 20% moisture
Electronics Forum | Tue Aug 16 15:43:32 EDT 2022 | emeto
Humidity card should show actual humidity in the package accurately. If it shows below 10%, actual humidity should be less than 10%. There is nothing to account for from previous cards.
