Radio frequency identification RFID tags

Sangoi, R., Smith, C. G., et al. (2004), Printing radio frequency identification (RFID) tag antennas using inks containing silver dispersions, J. Dispersion Sci. Technol. 25(4), 513-521. 

Another major technology area that can utflize conductive IJ ink is the display market. Inkjet can be applied for both flexible and rigid displays such as electroluminescent and electrophoretic displays (including e-paper), hquid crystal displays (LCD), plasma display panels (PDP) and touch screens some functionalities have already been printed by IJ technology in certain display apphcations, for example RGB color filters. Conductive IJ is also appropriate for use in thin film transistors (TFT), disposable batteries, radio-frequency identification (RFID) tags, and a range of chemical and electronic sensors. 

For all-printed thin film transistors (TFT), various organic and inorganic metal electrode materials, such as conductive polymer, carbon nanotube (CNT), organic metal compound, or metal nano-particles, have been used as gate and source/drain electrodes [6-11] in a combination with inkjet- and laser-based printing methods. One of the immediate applications for all-printed TFT would be flexible or rugged display backplane and disposable radio frequency identification (RFID) tags. In addition, printed metal electrodes and TFT have also been used to fabricate passive circuit components, power transmission sheets and sensors for ambient electronics and electronic skin [12-13]. 

In 2009, in an attempt to curb theft, Saguaro National Park in Arizona began injecting radio frequency identification (RFID) tags into its saguaro cacti, which can sell for 1,000 on the black market. 

Manufacture of formed embedded active devices has been demonstrated, but not produced commercially. An example is polymer semiconductor radio frequency identification (RFID) tags. Conventional RFID devices, now in mass production, use a tiny silicon integrated circuit, made conventionally and bonded to the antenna. Semiconducting polymers make up the source, drain, and gate of the integrated circuit and are applied by inkjet or screen printing. 

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