Precautions for transportation: the package shall be complete and the loading shall be stable when the goods are transported. During transportation, containers shall be free from leakage, collapse, falling and damage. It is strictly prohibited to mix with oxidants, acids, halogens, etc. During transportation, it shall be protected from sun exposure, rain and high temperature.

Copper has the advantages of low resistivity, low electromigration rate, and low price. It is one of the ideal substitutes for the silver palladium internal electrode. However, its chemical properties are relatively active. In the air, powdered copper with large specific surface area is very easy to be oxidized, and the surface will form Cu2O and CuO films, which will rapidly reduce its conductivity, or even become non-conductive.