Radio-frequency identification (RFID) antenna directly printed by electrospraying

Abstract

This letter reports an electrospraying-based printing system developed with high-precision on-off control, which has the merits of anti-clog printing, maskless patterning, and precise control. Silver-colloid-based ink was used to directly print on glass or aluminum foil substrates just like a dip-pen. The minimum silver line width could reach 30μm, meanwhile the thickness and width of the silver line can be adjusted according to the customer demand. A specially-designed radio frequency identification (RFID) tag antenna was printed using this system. The printed RFID tag antenna was characterized and analyzed, which meets the basic requirements of practical applications.