vacuum sealing

**Vacuum sealing** is the **packaging process that removes air from sealed bags to reduce moisture and oxidation exposure during storage and shipment** - it supports long-term protection of sensitive semiconductor components. **What Is Vacuum sealing?** - **Definition**: Air is evacuated before final heat-seal closure to reduce internal moisture-carrying atmosphere. - **Protection Benefit**: Lower oxygen and humidity presence helps preserve package and terminal condition. - **Integration**: Often used with desiccant and barrier materials in dry-pack systems. - **Limitations**: Seal integrity remains critical because leaks quickly negate vacuum benefits. **Why Vacuum sealing Matters** - **Moisture Control**: Improves moisture-protection margin for MSL-sensitive devices. - **Surface Preservation**: Reduces oxidation risk on terminals and solderable finishes. - **Shelf Stability**: Supports extended storage windows when combined with proper materials. - **Logistics Robustness**: Adds protection against variable transit environments. - **Process Risk**: Poor vacuum or seal process can create false confidence and hidden exposure. **How It Is Used in Practice** - **Equipment Calibration**: Verify vacuum level and seal temperature on defined maintenance intervals. - **Leak Testing**: Use periodic integrity checks to confirm retained package tightness. - **Combined Controls**: Pair vacuum sealing with humidity indicators for verification at point of use. Vacuum sealing is **a supplemental protective method in advanced dry-pack handling** - vacuum sealing should be validated as part of full moisture-control system performance, not used in isolation.