In the past, antennas in RFID tags were usually made of copper corrosion. Because the corrosion of copper is not only harmful to environmental protection, but also the production cost is very high, so for those high-end products, it may be acceptable for manufacturers and consumers to increase the cost by a few dollars. People imagine making conductive antennas by printing rather than etching. This technology is considered as a great innovation to reduce the production cost of RFID tags, and RFID tags have brought great business opportunities to the printing industry. Screen printing is the most commonly used process for printing electronic labels at home and abroad, but it is not the most ideal process.

The thickness of the printed antenna of the electronic tag is generally 0.0 1 ~ 0.04 mm, which requires that the screen printer must be able to print enough thin lines, and the smaller the gap between two adjacent thin lines, the better, so as to ensure that the electronic tag can be made very small. However, it is difficult to make the gap very small on ordinary screen printing machines. In addition, in order to ensure the conductive performance of the antenna, the screen printing machine also requires uniform printing thickness when printing electronic labels, otherwise, if there are some tiny cracks or depressions when printing the antenna, the conductive performance will be affected. There is a high requirement for the environment in the antenna printing process, because if there is dust in the environment during the printing process, it will also affect the conductivity between wires.