| 摘要 |
The identification unit has a structural unit formed as a coating on a substrate. The identification unit is detected by an electromagnetic radiation in a tera-hertz frequency region. The coating has a thickness smaller than 50 nanometer and an electrical conductivity of 100 siemens per meter. The maximum thickness of the coating is kept at 15 nanometer. The coating is composed of aluminum, copper, gold, silver, cobalt, nickel, iron and alloy of metals. The structural unit has a substructure for producing diffraction and interference effects. |
