Storage and Preservation
Richtek products are majorly MSL1 or MSL3 based on the package types.
Richtek follows SPEC.: J-STD-033 for the standard packing method below:
Package Type
|
MSL Level
|
Shelf Life*1
|
Floor Life*2
|
MBB*3 with HIC
|
Desiccant
|
MSID Label
|
Caution Label
|
| WLCSP |
1
|
No limit
|
No limit
|
No
|
No |
Optional
|
No |
| Others |
3 |
24 months
|
168 hours
|
Yes |
Yes
|
Yes |
Yes
|
- *1. Shelf Life - The allowable time period for the products kept under appropriate storing condition
- *2. Floor Life - After opening the MBB, the allowable time period for the products stored under appropriate environment condition (< 30℃/ 60%RH)
-
*3. MBB - Moisture Barrier Bag, HIC - Humidity indcator Card
Richtek recommends the storage conditions MSL3 as below:
1. Calculated shelf life in sealed bag is 24 months at <40℃ and <90%RH.
2. After the bag is opened, devices that will be subjected to reflow solder or other high temperature process must be
- 2-1. Mounted within 168 hours of factory conditions < 30℃ and 60%RH, or
- 2-2. Stored at <10%RH
3. Devices require bake, before mounting, if:
- Humidity Indicator Card is >10%, or
- 2-1 or 2-2 not met
4. If baking is required, devices may be baked for 48 hours at 125℃±50℃.
Remarks:
- Above contents are printed or labeled on the vacuum aluminum bag.
- Before baking, devices need to be removed from the carrier tape and placed on the tray.