Oxide-Channel Ferroelectric-Gate Thin-Film Transistors with Nonvolatile Memory Function

  • Eisuke TokumitsuEmail author
Part of the Topics in Applied Physics book series (TAP, volume 131)


In this chapter, principle and progress of oxide-channel ferroelectric-gate transistors were reviewed. At first, it is pointed out that ferroelectric-gate insulator can induce large charge density because of the remanent polarization, in addition to nonvolatile memory function. Next, using this feature of ferroelectric-gate insulator, it is shown that even conductive oxide, such as indium-tin-oxide (ITO), can be used as a channel if its thickness is thin enough. Good transistor performance is demonstrated for ITO-channel ferroelectric-gate TFTs. In particular, a large on-current can be obtained in such devices, because large charge density is utilized even though the channel mobility is not so high. Furthermore, transparent devices were demonstrated using ITO for both channel and electrodes. In addition, ITO-channel TFTs without nonvolatile memory function are demonstrated using high-dielectric constant (high-k) material as a gate insulator.



The author would like to acknowledge students in his group for their works related on the presented subject.


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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.School of Materials ScienceJapan Advanced Institute of Science and TechnologyNomiJapan

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