• HOME
  • Press Releases : 2017
  • Multibit Flexible Temperature Sensor Created with the World’s Fastest Organic CMOS Circuit - Further Evolution as IoT Device that Helps Information Management Advance from Box-Based to Individual Item-Based -

Press Releases

Multibit Flexible Temperature Sensor Created with the World’s Fastest Organic CMOS Circuit
- Further Evolution as IoT Device that Helps Information Management Advance from Box-Based to Individual Item-Based -

February 14, 2017

TOPPAN FORMS CO., LTD.

Fujifilm Corporation

Technology Research Institute of Osaka Prefecture

JNC Corporation

Denso Corporation

Tanaka Kikinzoku Kogyo K.K.

Electroplating Engineers of Japan Ltd.

Pi-Crystal Incorporation

University of Tokyo

The group, including TOPPAN FORMS, Fujifilm Corporation and Pi-Crystal Incorporation, succeeded in the further acceleration and integration of the organic semiconductor CMOS circuit, which can be manufactured by printing through the NEDO project. This has made it possible to significantly increase the amount of information acquired from the unique ID code and temperature sensor stored inside the electronic tag.
The world’s fastest organic CMOS circuit developed today is formed entirely on a film substrate. It is a plastic electronic tag with a low-cost temperature sensor facilitating the IoT, which is a huge step towards mass production for a wide range of applications such as advanced logistics management and healthcare.

Exhibition of this achievement is scheduled at the NEDO booth at Nano Tech 2017 held at Tokyo Big Sight from February 15 to 17, 2017.

Figure 1: Digital circuit and prototype tag for the temperature control electronic tag composed of the world’s fastest organic CMOS circuit
Figure 2: Temperature sensor block equipped with organic A/D converter circuit

This achievement was made as part of the development of plastic electronic tags using innovative high-performance organic transistors in the Program for Strategic Innovative Energy Saving Technology of the New Energy and Industrial Technology Development Organization (NEDO).

1. Achievements in this project

  • (1) Integration with world’s fastest organic CMOS
    Pi-Crystal Incorporation, Fujifilm Corporation, and Dr. Junichi Takeya and his group at the University of Tokyo developed a high-mobility organic semiconductor CMOS circuit using application single crystallization, which applies a solution for single crystallization. In the high-speed operation of the organic CMOS flip-flop circuit in Figure 3, the logic operations speed exceeds 0.5 MHz, achieving a speed over one order of magnitude higher than in past reports by the same group. The group also developed a process to achieve integration without relying on conventional methods of miniaturization by stacking the p-type layer and n-type layer. These new technologies enable the construction of sophisticated integrated circuits that use more than a few thousand transistors and direct communication between a temperature control electronic tag and smart device.
Figure 3: Digital circuit (left) of temperature control electronic tag and high-speed logic operation waveform (right)
  • (2) Temperature sensor reading achieved with flexible multibit organic A/D converter
    The group from the Technology Research Institute of Osaka Prefecture has developed a flexible temperature sensor structure that can operate stably even in the refrigeration or freezing temperature range for logistics temperature monitoring. Jointly with Pi-Crystal Incorporation, the group also created a multibit A/D converter that converts the analog signals of a temperature sensor into digital signals using the organic CMOS flip-flop circuit with the world’s fastest response speed, using a semiconductor that can perform this in printing for the first time (Figure 4). A combination of this with the organic semiconductor CMOS circuit (Figure 1) allows for the configuration of an electronic tag for temperature control capable of contactless communication, which can be used for low-cost temperature monitoring in logistics management, environmental management, and other areas.
Figure 4: Organic A/D converter circuit for reading the temperature sensor (left), the manufactured device (upper right), and its output characteristics (lower right)

[Glossary]

  • *1 An organic CMOS (complementary metal-oxide-semiconductor) circuit is a circuit in which thin-film transistors using p-type and n-type organic semiconductors are integrated in an active layer. It allows for efficient logic operations with low power consumption.
  • *2 A flip-flop circuit is a logic circuit for recording and maintaining logical information. It allows for digital signal processing with a large amount of data. The D flip-flop is used in this project.

2. Overview and purpose of the NEDO project

The group consisting of TOPPAN FORMS CO., LTD., Fujifilm Corporation, Technology Research Institute of Osaka Prefecture, JNC Corporation, Denso Corporation, Tanaka Kikinzoku Kogyo K.K., Electroplating Engineers of Japan Ltd., Pi-Crystal Incorporation, and the University of Tokyo has been conducting plastic electronic tags development using innovative high-performance organic transistors in the NEDO Program for Strategic Innovative Energy Saving Technology.


This project aims to develop an RFID tag that forms an organic semiconductor film easily at low cost, with a target cost of less than 10%, more than 10 times an improvement in performance, and a cost efficiency of more than 100 times that of a conventional polycrystalline organic semiconductor device, with a high-speed response capability that allows communication with a commercial frequency.

Figure 5: Project organization chart

3. Contact for Inquiries

For inquiries on this research contact:
Dr. Junichi Takeya, Graduate School of Frontier Sciences, University of Tokyo
TEL: 04-7136-3790, 080-5484-2760; FAX: 04-7136-3790
E-mail: takeya@k.u-tokyo.ac.jp

Public Relations Department
General Affairs Division
TOPPAN FORMS CO., LTD.
1-7-3 Higashi Shimbashi, Minato-ku, Tokyo 105-8311, JAPAN
Inquiry Form