Title
Flexible thin-film NFC tags
Author
Myny, K.
Tripathi, A.K.
van der Steen, J.L.
Cobb, B.
Publication year
2015
Abstract
Thin-film transistor technologies have great potential to become the key technology for leafnode Internet of Things by utilizing the NFC protocol as a communication medium. The main requirements are manufacturability on flexible substrates at a low cost while maintaining good device performance characteristics, necessary to be compatible with the NFC specifications. Such low-cost flexible NFC tags can be attached to any object with any form factor, connecting this object to the Internet using a smartphone or tablet as an intermediate node. Among all commercial thin-film transistor technologies, metal oxide transistors is a viable technology for this application. The metal-oxide transistors in this work are based on InGaZnO as semiconductor. Since these are unipolar by nature (i.e., they exhibit only n-type transistors), different options to make logic circuits are studied from static and dynamic points of view. The different topologies are diode-load logic, dual-gate diode-load logic, and pseudo-CMOS logic. The static parameters lead to a comparison of soft yield between those circuit topologies, while the transient analysis provides insight on the power consumption and circuit speed. This is indicative for selecting the logic style matching the data rate requirements of the NFC standards. Moreover, metal-oxide NFC circuits that combine 12-bit code generators to the analog front-end of RFID tags are integrated on a PCB board to evaluate performance of a matched and optimized system. The measured data rates of these integrated NFC tags are compatible with the ISO 15693 specifications. Finally, a fully integrated, flexible NFC tag is realized, which comprises the tuning capacitor, rectifier, load modulator, and code generator. cop. 1979-2012 IEEE.
Subject
Nano Technology
HOL - Holst
TS - Technical Sciences
Industry Electronics
Industrial Innovation
Electric network analysis
Electric network topology
Internet protocols
Metallic compounds
Near field communication
Thin film transistors
Thin films
Transistors
Flexible thin films
NFC
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http://resolver.tudelft.nl/uuid:987514a5-ac66-418d-8a00-9a732c883a65
DOI
https://doi.org/10.1109/mcom.2015.7295482
TNO identifier
528816
Publisher
Institute of Electrical and Electronics Engineers Inc.
ISSN
0163-6804
Source
IEEE Communications Magazine, 53 (10), 182-189
Article number
7295482
Document type
article