Organic RFID Tags

status: publishe

Robust digital design in organic electronics by dual-gate technology

Research towards organic RFID tags is one of the drivers of organic electronics. In recent years, 64b organic RFID tags have been shown with capacitive coupling [1] and inductive coupling at 13.56 MHz [2,3]. Recent improvements were a 128b organic transponder chip with basic anti-collision and Manchester encoding [4] and a first 4b tag in complementary organic technology [5]. ©2010 IEEE.status: publishe

Unipolar Organic Transistor Circuits Made Robust by Dual-Gate Technology

Dual-gate organic transistor technology is used to increase the robustness of digital circuits as illustrated by higher inverter gains and noise margins. The additional gate in the technology functions as a V-T-control gate. Both zero-V-GS-load and diode-load logic are investigated. The noise margin of zero-V-GS-load inverter increases from 1.15 V (single gate) to 2.8 V (dual gate) at 20 V supply voltage. Diode-load logic inverters show an improvement in noise margin from similar to 0 V to 0.7 V for single gate and dual gate inverters, respectively. These values can be increased significantly by optimizing the inverter topologies. As a result of this optimization, noise margins larger than 6 V for zero-V-GS-load logic and 1.4 V for diode-load logic are obtained. Functional 99-stage ring oscillators with 2.27 mu s stage delays and 64 bit organic RFID transponder chips, operating at a data rate of 4.3 kb/s, have been manufactured.status: publishe

Unipolar organic transistor circuits made robust by dual-gate technology

\u3cp\u3eDual-gate organic transistor technology is used to increase the robustness of digital circuits as illustrated by higher inverter gains and noise margins. The additional gate in the technology functions as a V\u3csub\u3eT\u3c/sub\u3e-control gate. Both zero-V\u3csub\u3eGS\u3c/sub\u3e-load and diode-load logic are investigated. The noise margin of zero- V\u3csub\u3eGS\u3c/sub\u3e-load inverter increases from 1.15 V (single gate) to 2.8 V (dual gate) at 20 V supply voltage. Diode-load logic inverters show an improvement in noise margin from ∼0 V to 0.7 V for single gate and dual gate inverters, respectively. These values can be increased significantly by optimizing the inverter topologies. As a result of this optimization, noise margins larger than 6 V for zero- V \u3csub\u3eGS\u3c/sub\u3e-load logic and 1.4 V for diode-load logic are obtained. Functional 99-stage ring oscillators with 2.27 μs stage delays and 64 bit organic RFID transponder chips, operating at a data rate of 4.3 kb/s, have been manufactured.\u3c/p\u3

Robust digital design in organic electronics by dual-gate technology

\u3cp\u3eResearch towards organic RFID tags is one of the drivers of organic electronics. In recent years, 64b organic RFID tags have been shown with capacitive coupling [1] and inductive coupling at 13.56 MHz [2,3]. Recent improvements were a 128b organic transponder chip with basic anti-collision and Manchester encoding [4] and a first 4b tag in complementary organic technology [5].\u3c/p\u3

An inductively-coupled 64b organic RFID tag operating at 13.56MHz with a data rate of 787b/s

\u3cp\u3eA 64b inductively coupled organic RFID tag on foil is demonstrated at 13.56MHz. The digital logic foil comprises 414 pentacene transistors and is powered by a pentacene double half-wave rectifier, connected to an inductive antenna. The data rate is 787b/s with load modulation behind the rectifier (DC). Also shown is a functional AC-modulated organic RFID tag.\u3c/p\u3

Towards EPC compatible plastic RFID tags

\u3cp\u3eA target application for plastic RFID tags is Electronic Product Coding (EPC). The EPC-specifications set some demanding requirements for RFID tags. In this work, we review the work that has been done to fulfill some of these specifications. We describe a complete 64-bit RFID tag that is inductively-coupled at a base carrier frequency of 13.56 MHz, and transmits data at rates below 1 kb/s. Next, we demonstrate 8-bit RFID transponder chips having data rates of 50 kb/s, an important milestone for organic RFID tags in view of EPC specifications.\u3c/p\u3

Towards EPC-compatible organic RFID tags

\u3cp\u3eIn this chapter, fully integrated organic RFID tags are demonstrated. These tags are inductively-coupled at a base frequency of 13.56 MHz and can be read out at distances up to 10 cm, which is the expected readout distance for proximity readers. We also demonstrate next generation transponder chips, fabricated in a dual-gate technology. The additional gate, backgate, is used to control the threshold voltage and allows integration into more robust unipolar, dual-V\u3csub\u3eT\u3c/sub\u3e transponder chips. Finally, we realized an 8-bit transponder chip having data rates that are EPC-compatible. This has been achieved in our thin-film transistor technology by introducing a high-k Al\u3csub\u3e2\u3c/sub\u3eO \u3csub\u3e3\u3c/sub\u3e gate dielectric, by scaling the channel lengths down to 2 mm and by reducing the overlap capacitance of the parasitic source-gate and drain-gate capacitors.\u3c/p\u3