Electronics Forum | Wed May 08 04:46:25 EDT 2013 | mbb
Hello, I want to ask what are causes that could engender rejected components in Panasonic pick and place machine?
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 | Tue Jul 17 00:10:32 EDT 2012 | amitsindwani
Referring to IPC/JEDEC J-STD-033B.1 section 3.3.2.2 'The amount of desiccant used, per moisture barrier bag, shall be based on the bag surface area and WVTR in order to limit the interior relative humidity in the MBB to less than 10% at 25°C.' So wha
Electronics Forum | Tue Feb 07 05:40:16 EST 2006 | pavel_murtishev
Good day, J-STD-033A: 4.1.2.2 Moisture Sensitivity Levels 5-5a For moisture sensitivity Levels 5 and 5a with floor life exposure not greater than 8 hours, a minimum desiccating period of 10X the exposure time is required to dry the SMD packages en
Electronics Forum | Mon Mar 26 22:57:28 EDT 2007 | sleech
Paul: You are dead-on! Desiccant and nitrogen cabinets are a great way to maintain the current moisture content level of a MSD package. But if you look at the 40 degree C schedule (Table 4-1) in J-Std-003B, you will find that the drying capability o
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 | Mon Mar 04 12:31:16 EST 2013 | mmjm_1099
I was wondering if anyone could suggest something to place at my three SMT lines to store any open MSL material while they are running in production. Has anyone made any homemade cabinets? I was referring to Desiccator Cabinets in the google search
Electronics Forum | Fri Feb 03 09:44:26 EST 2006 | amol_kane
Hi James, As far as i can see, if you reseal the bags, then storing in a dry cabinet would be unuseful (as the McDry will no longer be able to absorb moisture from the components, and the dry bag will only be as effective as the desiccant in it) i t
Electronics Forum | Thu Jul 08 15:47:16 EDT 2021 | djenkins62
Has anyone experienced more moisture adsorbing into the moisture sensitive part than the beads in the approved desiccant bag in the MBB. The reason for this is a concern is by having the part adsorb more moisture, the HIC card can give a false readi
Electronics Forum | Fri Mar 19 13:18:03 EDT 2010 | deanm
Regarding your question about buying equipment to vacuum seal the MBBs, according to the IPC/JEDEC standard, "Full air evacuation is not needed or recommended; light air evacuation will reduce the packaging bulk and enhance carton packing. Excessive
