The storage conditions for PCBs (Printed Circuit Boards) directly impact their performance and subsequent operational effectiveness; improper storage can lead to issues such as oxidation, moisture absorption, and deformation. The following are key recommendations regarding storage conditions:
1. Environmental Temperature and Humidity
Temperature: Recommended range is 10–25°C (avoid extreme high or low temperatures).
High temperatures (>30°C) can accelerate oxidation or material aging.
Low temperatures (<0°C) can cause material embrittlement.
Humidity: Relative humidity should be 30–60% RH (moisture protection is essential).
Excessive humidity (>60%) easily leads to moisture absorption, oxidation of solder pads, or deformation of the laminate material.
Storage should be facilitated using moisture-proof cabinets or desiccants (such as silica gel).
2. Anti-Static Measures
Static-Sensitive PCBs:
Store in anti-static bags (e.g., silver metalized shielding bags compliant with the MIL-STD-883 standard) or anti-static storage boxes.
Avoid direct contact with conductive objects or handling without proper grounding.
3.Packaging Methods
Vacuum Sealing: Unused PCBs are recommended to be vacuum-sealed with a desiccant pack enclosed.
Separated Placement: Multi-layer PCBs should be separated by foam or anti-static paper to prevent mechanical scratching.
Avoid Excessive Stacking: Stacking height should be kept within a reasonable limit (e.g., <1 meter) to prevent deformation.
4. Protection from Light and Dust
Light Protection: For long-term storage, keep PCBs away from ultraviolet light (such as direct sunlight) to prevent aging of the solder mask layer.
Dust-Free Environment: Dust contamination on solder pads can compromise soldering quality.
