Electronics Forum | Mon Jul 23 08:35:33 EDT 2012 | grahamcooper22
The lower the RH in the MBB the better for all moisture sensitive devices. Maintaining less then 5% will mean no parts of between 2a-5a MSL will need drying before use. The calculation uses 10% because it is a sensible amount of desiccant to use base
Electronics Forum | Wed Jun 11 17:16:12 EDT 2003 | MA/NY DDave
Hi I had to poke around awhile to see what you meant. I think you were at an advanced level where IF he knew the MSL ratings of his devices he should constrain his profile within the component mfgs tests for exposure to various profiles, or at leas
Electronics Forum | Wed Sep 13 09:15:19 EDT 2006 | Rob
Hi Peter, Out of the 1.5 billion components we shipped last year, we had 3 components back for solderability issues. All 3 had been taken out of their vacuum packaging and left to oxidize for a number of weeks. We don't see it as an issue, but we
Electronics Forum | Thu Aug 30 09:56:16 EDT 2007 | blnorman
According to J-STD-033 Table 4-1, the bake out time to restore the clock to zero is not only determined by the MSL level, but the package thickness as well. Section 4.2.2 states "SMD packages shipped in low temperature carriers may not be baked in t
Electronics Forum | Wed Aug 20 13:49:51 EDT 2008 | mrmaint
We used a custom label that we would put on the parts packaging. The label would indicate the MSD level, the maximun hrs of exposure allowed. Also it had fields that whoever opened up that part would write down the date and time the packaging was ope
Electronics Forum | Fri Mar 19 07:18:14 EDT 2010 | grahamcooper22
Hi, do you know if your LEDs are moisture sensitive ? And if so what MSL level ? Surprisingly it seems that not all are, but some seem really sensitive. I imagine the differences are down to the plastics used and the LED manufacturing processes. I a
Electronics Forum | Thu May 12 14:15:50 EDT 2016 | kahrpr
This is just me but I would just let it air dry. If you think about it. If you were using water soluble paste you would run it through a washer and it would survive. If this was a BGA i would be very concerned. If you are truly worried look an the ma
Electronics Forum | Fri Apr 21 08:07:10 EDT 2006 | amol_kane
I struggled with the std too, when trying to justify the need for a desiccant cabinet. according to my interpretation: 1. the components are baked at 125 or 150 dec C within 24 hrs of manufacture (this is MET) and sealed in the MBBs at the component
Electronics Forum | Fri Mar 09 04:10:18 EST 2012 | grahamcooper22
Hi, I've been supplying Totech dry cabinets in the Uk for 10 years and in that time I've realised the only places to find the correct MSL level is on the dry pack the devices are shipped in or by spending hours on the internet or speaking to the devi
Electronics Forum | Thu Mar 17 10:24:43 EST 2005 | Bob R.
I can't answer your question directly, but we're an automotive supplier and we don't do dual reflow with QFPs because of their moisture sensitivity level. We don't have the processes in place to manage the time between first and second pass so we'd
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