1, SMD materials more moisture, after welding materials to moisture, little effect on the performance, if the SMD welding materials in the back before the moisture will cause serious adverse, in the reflow process, the moisture becomes steam, this High-temperature steam will have a material SMD stress, resulting in damage to the internal structure of SMD, it is necessary to protect the SMD in welding is not exposed to moisture.
 2, in order to protect SMD in the transport process is not exposed to moisture, SMD with the band Hole and reel to be sealed in moisture-proof aluminum bags, see icon 2.  Each bag placed desiccant (must ensure that the sealed bag, the bag can not be sharp object punctured).

 Once after Kaifeng, SMD materials must be used within 24 hr.  Short-term preservation should be placed less than 30% RH environment, and to be loaded to the dry containers.  Humidity Cabinets should be placed on long-term preservation or placed on dry desiccant sealed container, open the sealed after the non-use, to be replaced after the desiccant re-sealed, if the SMD materials placed in Kaifeng humidity after more than 30% RH The environment, to welding, component should be put in the baking ovens 60 ℃ to 96 hours of desiccant.