Research Of All Printed RFID TAGS Fabrication

In recent years, with the high-speed development of large scale integrated circuits, communication engineering and fabrication technology, Radio Frequency Identification draws a lot of attention because of its unique merits. As a newly born wireless communication system, radio frequency identification technology has been listed as one of the most important technologies in 21 st century. The core question of RFID technology in engineering application is how to greatly reduce the cost of tags on the basis of good communication performance. Based on the addition method, this paper proposes All Printed Electronics which combined with inkjet printing. This new technology researches the fabrication of tag antennas on polyimide substrate, it is possible to solve the cost and performance requirements.This paper firstly introduces the working principle of RFID technology and the construction of RFID system, it introduces the classification of the tag antenna. Considering the cost and performance,the basic structure of tag antenna is designed. It is on the basis of the principle of antenna design and fabrication. In order to improved the performance, it designs tag antenna by means of HFSS software, meanwhile, it discusses possible effect from the size of antenna, and then the structure is optimized. This paper introduces different kinds of antenna fabrications. Then, it proposes a brand new All Printed Electronics technology. The first part is choosing the appropriate substrate and prepares precursor ink, choosing polyimide as the substrate material from a number of substrates and then doing the surface modification to polyimide films. During this process, it compares the infulence of different processing temperatures. Finally, it proves 40°C is the best processing temperature. The second part is the full printed metallization process of PI films after surface modification. In order to obtain the dipole antenna with high adhesive quality and high radiation efficiency, this paper studies the copper plating effect under different time, 5 min is finally determined as the best time to copper plating. To the next,the specific steps of antenna fabrication are presented. Finally, it tests the reading and writing performance of the tag antenna, the performance meets the requirements.