Bridging R2R Printed Wireless 1 Bit‐Code Generator with an Electrophoretic QR Code Acting as WORM for NFC Carrier Enabled Authentication Label

Abstract

spanning almost the entire range of commercial products in industry, agriculture, and medicine. That is why the development of roll-to-roll (R2R) printed passive RFID tags is extremely attractive, due to perceived cost reduction achievableindeed, this has been the driving force for the realization of the penny RFID tag for the ID and the authentication without incorporating any encryption engine. SuchThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/admt.201900935.Printed electronics has been received a great deal of attention in the last two decades with a primary focus being on the use of organic semiconductors for the inexpensive and flexible electronic devices. [1][2][3][4][5][6][7][8] Applications such as flexible displays and passive radio frequency identification (RFID) tags have been widely touted in this regard. In particular, the roll-to-roll (R2R) printed passive 13.56 MHz RFID tag has a very competitive advantage for ID and authentication to prevent counterfeits over the traditional Si-chip based one because the low cost is always the first priority to be considered to authenticate genuine products

The First Step towards a R2R Printing Foundry via a Complementary Design Rule in Physical Dimension for Fabricating Flexible 4‐Bit Code Generator

“…Maintaining the value in OPRA is an important parameter for formulating the complementary design rule (Figure 1d) which will dictate the limits of physical dimension and electronic function in integrated p‐type and n‐type TFTs fabricated via an all‐R2R gravure printing process. [ 13 ] By matching the limit of OPRA and five different electronic inks (Figure 1a) with the complementary design rule (Figure 1d), four different standard ring oscillators (9, 7, 5, and 3 stages) were designed with one optimized physical dimension [ 17 ] for p‐type TFTs and four different physical dimensions ( Table 1 and Figure a) for the n‐type TFTs. Then, p‐type and n‐type TFTs were printed via R2R gravure at the printing speed of 6 m min −1 in order to test the complementary design rule for utilizing the printed TFTs for printing ring oscillators.…”

“…After printing all the active layers, a poly(4‐vinylphenol) (Sigma‐Aldrich Co., Korea) based insulating ink was printed at the crossing section (junction area) (see the Experimental Section), and then drain–source electrodes were printed by R2R gravure using 10 Kg f of the impression roll pressure, 7.5 Kg f of the web tension and a printing speed of 6 m min −1 . Finally, n‐doping layers were printed to selectively convert p‐type SWNT‐TFTs into n‐type SWNT‐TFTs through the R2R gravure using bPEI‐TiO 2 ink [ 17 ] under identical printing conditions to that of printing drain–source electrodes. Upon completion, 16 different ring oscillators with different channel length and gate widths in n‐type TFTs (Table 1 and Figure 3a) are fabricated.…”

Significance of Flexible Substrates for Wearable and Implantable Devices: Recent Advances and Perspectives

“…devised a roll‐to‐roll (R2R) printing technology to bridge quick response (QR) codes in R2R‐printed CMOS‐based ring oscillators. [ 88 ] A poly (ethylene imine)‐based n‐doping ink was prepared and applied by a R2R gravure printing system.…”

“…Dip coating, [ 93 ] spray coating, [ 88,107,126–129 ] spin coating, [ 8c,105,131,132 ] and mayor rod coating [ 91,102 ] are among the most common coating techniques. Kwon et al.…”

Printed Four Key‐Device Units for Unified Platform of Wireless Anti‐Counterfeiting Label to Bridge in Blockchain

“…Initially, an R2R gravure printing method (Figure 2a) was utilized to print antenna, bottom electrodes for diodes and capacitors, [16] dielectric layers, and top electrodes for the capacitors at a printing speed of 6 m min −1 by following previously reported printing conditions. [9,19,20] Silver nanoparticle-based ink (Figure S1, Supporting Information) was used to print the bottom electrodes and antenna by the R2R gravure while the dielectric layers with BaTiO 3 based ink (Figure S2a, Supporting Information). After printing dielectric layers, the R2R printed web was rewound, and the top electrodes were R2R printed using copper ink to complete the filter capacitors (Figure 3c; Figure S2b,c, Supporting Information).…”