McDry Ultra-Low Humidity Storage Cabinets
IC Package Storage Specified by IPC/JEDEC
Dry Box Storage Guideline as Recommended by IPC/JEDEC J-STD 033B.1
(Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Mount Devices.)
According to IPC/JEDEC J-STD 033B.1, IC packages should be stored in a dry box capable of maintaining either 10%RH or 5%RH in order to prevent components from absorbing moisture.
Storage in a cabinet below 5%RH: No limit in floor life.
Storage in a cabinet below 10%RH: Please see chart below for examples.
(Section of Table 7-1 from IPC/JEDEC J-STD 033B.1)
| Package Type and Body Thickness |
Moisture Sensitivity Level |
Floor life depending on humidity and temperature | Temp | |||||||||
| 5* | 10* | 20* | 30* | 40* | 50* | 60* | 70* | 80* | 90* | |||
| Body Thickness > 3.1mm including PQFPs >84 pins, PLCCs (square) All MQFPs or All BGAs > 1mm |
2a | ∞ ∞ ∞ ∞ |
∞ ∞ ∞ ∞ |
94 124 167 231 |
44 60 78 103 |
32 41 53 69 |
26 33 42 57 |
16 28 36 47 |
7 10 14 19 |
5 7 10 13 |
4 6 8 10 |
←35ºC ←30ºC ←25ºC ←20ºC |
| 3 | ∞ ∞ ∞ ∞ |
∞ ∞ ∞ ∞ |
8 10 13 17 |
7 9 11 14 |
6 8 10 13 |
6 7 9 12 |
6 7 9 12 |
4 5 7 10 |
3 4 6 8 |
3 4 5 7 |
←35ºC ←30ºC ←25ºC ←20ºC |
|
| 4 | ∞ ∞ ∞ ∞ |
3 5 6 8 |
3 4 5 7 |
3 4 5 7 |
2 4 5 7 |
2 3 5 7 |
2 3 4 6 |
2 3 3 5 |
1 2 3 4 |
1 2 3 4 |
←35ºC ←30ºC ←25ºC ←20ºC |
|
| 5 | ∞ ∞ ∞ ∞ |
2 4 5 7 |
2 3 5 7 |
2 3 4 6 |
2 2 4 5 |
1 2 3 5 |
1 2 3 4 |
1 2 2 3 |
1 1 2 3 |
1 1 2 3 |
←35ºC ←30ºC ←25ºC ←20ºC |
|
| 5a | ∞ ∞ ∞ ∞ |
1 2 3 5 |
1 1 2 4 |
1 1 2 3 |
1 1 2 3 |
1 1 2 3 |
1 1 2 2 |
1 1 1 2 |
1 1 1 2 |
1 1 1 2 |
←35ºC ←30ºC ←25ºC ←20ºC |
|
According to IPC/JEDEC J-STD-033B.1, IC packages for moisture-sensitivity levels 2-3 that have been removed from MBBs must be kept in dry storage capable of maintaining no greater than 10% RH. The floor life of these components can be reset if stored in a dry box at 10%RH for five times the exposure period(under the conditions of 30 degrees C, 60% RH.) The exposure time is limited to a maximum of 12 hours.
Resetting of Floor Life for MSLs 4~5, 5a in a Dry Box.
IC packages with moisture-sensitivity levels of 4~5,5a should be stored in a dry box capable of maintaining no greater than 5%RH. The floor life of the components can be reset by storing the packages within a dry cabinet capable of maintaining 5%RH or lower for a period of ten times the exposure period (under conditions of 30 degree C, 60% RH). The exposure time is limited to a maximum of 8 hours.
