What is the recommended storage and handling procedure for moisture sensitive RF components?
Moisture Sensitive Device Handling
Moisture-related failures in RF assemblies are particularly costly because they often appear as intermittent or delayed failures after the product has been deployed. Proper storage and handling prevents these failures entirely.
- Performance verification: confirm specifications against the application requirements before finalizing the design
- Environmental factors: temperature range, humidity, and vibration affect long-term reliability and parameter drift
- Cost vs. performance: evaluate whether the application demands premium components or standard commercial grades
Frequently Asked Questions
How do I know the MSL of a component?
The MSL is printed on the moisture barrier bag label (per J-STD-033). It is also listed in the component datasheet under "Moisture Sensitivity Level" or "Package Information." If not specified: contact the manufacturer. For custom or specialty RF components: request MSL classification data per J-STD-020.
Can I reuse the moisture barrier bag?
No. Once opened, the bag seal is broken and cannot be resealed to the same moisture barrier standard. If components are not used immediately: place them in a new MBB with fresh desiccant and reseal, or store in a dry cabinet (< 5% RH). The humidity indicator card must show < 10% RH before resealing.
What if I exceed the floor life?
The components must be baked before reflow soldering. Standard bake profile: 125°C for 24 hours (for MSL 3-5 components in trays or tubes). Low-temperature bake: 40°C for 192 hours (8 days) for components on tape-and-reel (the reel carrier tape cannot tolerate 125°C). After baking: the floor life clock resets. Components can be baked a limited number of times (typically 3-5 cycles maximum before the cumulative heat exposure may affect the component).