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Internet of Things RFID tag antenna production technology and process research

Author: ChenYuanMing
Tutor: HeWei
School: University of Electronic Science and Technology
Course: Applied Chemistry
Keywords: RFID Conductive silver paste Reliability Bridge connection Compaction
CLC: TP391.44
Type: Master's thesis
Year: 2011
Downloads: 335
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Abstract

Radio frequency identification (Radio Frequency Identification, RFID) is a non-contact technology, an RF signal automatic object recognition is one of the main components of the Intelligent Internet of Things. Since a large number of commodity management after the world's retail giant Wal-Mart RFID tags based on RFID technology, attracted widespread attention. The passive RFID tag reader and labeling of the recognition system through space the alternating magnetic field inductively coupled, and the feedback information to each other. RFID has the most potential alternatives read distance, information storage capacity, high safety performance characteristics as barcode. The high cost of traditional manufacturing RFID antenna RFID popularization application difficulty, the screen printing conductive silver paste method of manufacturing RFID antenna (referred to as wire mesh) to solve this problem. RFID antenna to be manufactured in mass production due to the restrictions of the production equipment and raw materials matching, to ensure a stable and controllable process parameters. Craft the mature screen printing technology, conductive silver paste printing on coated paper substrate using screen printing machine to produce RFID antennas. The article in-depth analysis of the technical and technological parameters of the process of manufacturing antenna, discusses the impact of process parameters on the performance of the production of RFID, and by optimizing the test applied to the network version of the pressure on the scraper, printing speed, conductive silver paste curing temperature and time production to optimize the process parameters to obtain the optimum parameters are: scraper applied to the network version of the pressure of 0.4 MPa, the printing speed of 0.3 m / s, the curing time of 30 min and curing temperature 150 ° C; ensure that the manufacturing of RFID antennas to meet the requirements of the resistance characteristics. Conductive silver paste RFID antennas directly affect the quality of the bridge connection line effect to the closure of the antenna can. The paper studies the reliability of conductive silver paste RFID antenna bridge connection line, specifically around the following sections: cross the bridge to connect the thermal curing of the conductive silver paste and mechanical impact analysis of RFID antenna across the bridge to connect the line thickness by metallographic micro-slice microscope uniformity, research the flexural performance test, temperature and humidity testing and the height was warmed impact testing and other environmental factors on the reliability of the bridge connecting the lines. Experimental results show that the RFID antenna sample bridge connection line uniformity, thickness of about 5.93μm; cross the bridge to connect the conductive silver paste line in the deflection of 2 × 104 times the resistance increase of about 4.23?, That in a few deflection circumstances affect small; the RFID antenna samples into the temperature 50 ° C, 85% relative humidity conditions of temperature and humidity chamber 8h, the maximum change in resistance is 0.45? into the circulation temperature high and low temperature of -40 ℃ to 85 ℃ 3h after the shock test chamber, the change in resistance maximum is 0.15?, that the bridge connecting lines have better adaptation to the environment reliability. Thermocompression conductive silver paste line can increase the area of ??contact of the conductive particles, to reduce resistance and improve the quality factor Q. Thermocompression compaction Conductive Silver line, selecting the compaction temperature range from 140 ° C to 190 ° C, the compaction time range 60s ~~ 120s range of compaction pressure of 7 MPa, to 12 MPa. Article by uniform design system analysis of temperature, time and pressure conditions conductive silver paste RFID antenna line compaction process, use of the minitab software fit the nonlinear regression equation between them. Constant temperature and humidity test with the level of warm impact test the impact of environmental factors on the resistance of the conductive silver paste antenna. The results show that after compaction resistance decreases more than 50%, related systems up to 99.8% of the regression equation to predict the change in resistance after compaction antenna effect, the conductive silver paste antenna having a good adaptability to the environment, compaction of the antenna will not inductor impact. Invention a green produced RFID foil antenna method, the process is a half-cut aluminum foil using Daomo method to complete the production of the antenna line and the bridge connecting line is completed through the foil, a thermosetting film with a conductive adhesive tape laminate. This method produced RFID aluminum foil antenna is stuck in the laboratory stage, but to achieve this approach in the application of automated production, production equipment manufacturers to develop related automation equipment.

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