RFID Printing Method

21 Oct.,2022

 

RFID Printing Method

May 31, 2021

RFID printing is very different from traditional label printing. From the point of view of the definition of RFID, intelligence refers to a radio frequency circuit composed of chips, antennas, etc.; and a label is a commercial coat of the radio frequency circuit by the label printing process. From a printing point of view, the emergence of RFID will bring higher gold content to traditional label printing. The chip layer of RFID can be encapsulated and printed with paper, PE, PET or even textiles and other materials to make self-adhesive stickers, paper cards, tags or other types of labels. The chip is the key to RFID and is determined by its special structure. , Can not withstand the pressure of the printer, so in addition to inkjet printing, generally use the process of first printing the surface layer, then compounding with the chip layer and die cutting. The antenna has three manufacturing techniques: etching, coil winding, and printed antenna. Among them, RFID conductive ink printed antenna is a new technology developed in recent years.


1) How to print the antenna

Printed antenna is to directly use conductive ink to print conductive lines on an insulating substrate to form antennas and circuits, which is also called additive manufacturing technology. The main printing methods have expanded from only screen printing to offset printing, flexographic printing, gravure printing and other production methods. The more mature production processes are screen printing and gravure printing. The advancement of printing technology and its further application in the production of RFID antennas have reduced the production cost of RFID tags, thereby promoting the application of RFID electronic tags.


2) Screen printing RFID tags

RFID printing is mainly based on screen printing. In smart label printing, conductive ink is used, and the better screen for printing conductive ink is nickel foil perforated screen. It is a high-tech wire mesh, not a wire mesh woven from ordinary metal or nylon wires. It is a foil mesh made by drilling nickel foil. The mesh is hexagonal. It can also be made into a circle by electrolytic forming. Hole shape. The entire mesh surface is flat and thin, which can greatly improve the stability and precision of imprinting. It is used to print high-tech products such as conductive ink, wafers and integrated circuits. The effect is good. It can distinguish the circuit line interval of 0.1mm and the positioning accuracy can be Up to 0.01mm. You can also choose 61~100T/mm silk screen solvent printing plate printing, after printing conductive ink, drying at 60℃.