The moisture sensitivity level (MSL) label serves as a reference during product handling on the production floor.
The MSL label is attached to the following locations:
- Moisture barrier bag (MBB) or Aluminum bag (Al bag)
- Reel or cover tray of a bundled tray
The following table describes the label fields for the MSL label.
| Item | Description |
|---|---|
| MSL classification | The MSL classification shows the product's moisture sensitivity level based on IPC/JEDEC J-STD-020. The level is typically shown as a number in the top right corner of the label. |
| Peak package body temperature (PBT) | The product's maximum reflow temperature. See item 2 on Sample MSL label for MSL2 products. |
| Floor life | The maximum exposure time after unsealing the moisture barrier bag before the product needs baking. See item 3a on Sample MSL label for MSL2 products. |
| Storage conditions or requirements | Environmental storage conditions according to J-STD-033. See item 3b on Sample MSL label for MSL2 products. |
| Bake application | The conditions for when the device needs baking depends on product exposure. See item 4 on Sample MSL label for MSL2 products. |
| Bake requirements | The procedures or specifications to be followed when baking is required. See item 5 on Sample MSL label for MSL2 products. |
| Bag seal date | The date when the product is dry-packed. |
| Moisture-sensitive symbol | A visual symbol that identifies the product as moisture sensitive. |
| Moisture-sensitivity declaration | A statement indicating if the product is moisture sensitive or not. It is usually found at the top of the label. |
Figure 1. Sample MSL label for MSL1 products
Figure 2. Sample MSL label for MSL2 products
