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Road to the Development of an Instant-on PC

Development of novel transistor with combined logic and memory functions with power consumption reduced to one-millionth that of conventional devices.

A group headed by Dr. Tsuyoshi Hasegawa, a Principal Investigator at the International Center for Materials Nanoarchitectonics (MANA; Director-General: Masakazu Aono), National Institute for Materials Science (President: Sukekatsu Ushioda), in joint research with a research group under Prof. Takuji Ogawa of the Graduate School of Science, Osaka University, and a research group under Prof. Shu Yamaguchi of the Graduate School of Engineering, The University of Tokyo, succeeded in the development of a novel transistor, the gatom transistor,h which performs both logic and memory functions while reducing power consumption to 1 x 10-6 that of the conventional devices.

Logic elements which are capable of retaining their state (i.e., memory) will be indispensible for the development of instant-on personal computers (PC) and other electronic equipment. The development in this work is expected to accelerate the realization of these devices.

In contrast to conventional transistors, which control the movement of electrons in a semiconductor, the newly-developed gatom transistorh operates by transferring a very small amount of metal atoms in an insulator. By using an insulator, which has higher resistance than a semiconductor, as the base material, and realizing on/off states by transfer of a tiny amount metal atoms in this material, the new device achieves a high on/off ratio on the same level as conventional semiconductor transistors with extremely low power consumption. Furthermore, it was found that the gatom transistorh also operates as a memory element which retains states by control of the operating voltage range.

As non-volatile logic circuits, which reconfigure circuits corresponding to computational results, are able to retain their state even when the power supply is turned off, high expectations are placed on the developed device as a new type of computer circuit for realizing PCs with zero starting time. Conventionally, one glogic element with memoryh was formed by combining a logic element (transistor) and a memory element (memory). However, with the conventional devices, the power consumption required for memory is extremely high, and low power consumption, in which memory power requirements are greatly reduced, had been considered necessary for practical application. The gatom transistorh developed in this research reduces the power consumption required for memory to 1/1,000,000 that of the conventional technology. In addition, because it possesses both logic and memory functions, it is expected to contribute to the realization of neural computing systems.

This research was carried out as part of the research topic gDevelopment of Atom Transistorh (Research Representative: Tsuyoshi Hasegawa) in the research area gResearch of Innovative Material and Process for Creation of Next-generation Electronics Devicesh (Research Supervisor, Dr. Hisatsune Watanabe, President & CEO, Semiconductor Leading Edge Technologies, Inc.), Core Research of Evolutional Science & Technology, Team-based Basic Research (CREST) of the Japan Science and Technology Agency (JST). These results were published online by the scientific journal gApplied Physics Express (APEX)h on December 24, 2010.

For more detail, contact:

Tsuyoshi Hasegawa
International Center for Materials Nanoarchitectonics (MANA)
National Institute for Materials Science
TEL: +81-29-860-4734
E-Mail: hasegawa.tsuyoshi(at)
For inquiries regarding JST Project, contact:
Naoki Nagata
Department of Inclusive Research Administration,
Innovation Headquarters
Japan Science and Technology Agency
TEL: +81-3-3512-3524
FAX: +81-3-3222-2064
For general inquiry, contact:
Public Relations Office, NIMS
Public Relations Division
Japan Science and Technology Agency
5-3 Yonbancho, Chiyoda-ku, Tokyo
102-8666, Japan
TEL: +81-3-5214-8404
FAX: +81-3-5214-8432
Journal information
Title of paper: Volatile/Nonvolatile Dual-Functional Atom Transistor
Authors: Tsuyoshi Hasegawa, Yaomi Itoh, Hirofumi Tanaka, Takami Hino, Tohru Tsuruoka, Kazuya Terabe, Hisao Miyazaki, Kazuhito Tsukagoshi, Takuji Ogawa, Shu Yamaguchi, and Masakazu Aono.

Mikiko Tanifuji | Research asia research news
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