Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids
Ionic liquids (ILs), non-volatile liquids composed of cations and anions, have various attractive properties for electronic devices, such as wide potential windows. Combining ILs with electronic devices is presumed to be able to provide new options for realizing a sustainable internet of things soci...
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doaj-a0d15620edc34fe19431477a4edb4d682021-05-27T23:02:12ZengIEEEIEEE Access2169-35362021-01-019710137102110.1109/ACCESS.2021.30767019419034Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic LiquidsHiroshi Sato0https://orcid.org/0000-0002-7121-0043Hisashi Shima1https://orcid.org/0000-0002-9521-7362Yusei Honma2Yasuhisa Naitoh3Hiroyuki Akinaga4https://orcid.org/0000-0002-5521-3148Toshiki Nokami5Toshiyuki Itoh6https://orcid.org/0000-0002-8056-6287Kentaro Kinoshita7Department of Applied Physics, Tokyo University of Science, Katsushika, Tokyo, JapanDevice Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, JapanDevice Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, JapanDevice Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, JapanDevice Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, JapanCenter for Research on Green Sustainable Chemistry, Tottori University at Koyama, Tottori, JapanCenter for Research on Green Sustainable Chemistry, Tottori University at Koyama, Tottori, JapanDepartment of Applied Physics, Tokyo University of Science, Katsushika, Tokyo, JapanIonic liquids (ILs), non-volatile liquids composed of cations and anions, have various attractive properties for electronic devices, such as wide potential windows. Combining ILs with electronic devices is presumed to be able to provide new options for realizing a sustainable internet of things society because such liquid-solid hybrid devices have the capability to act as a key in realizing further possibilities that cannot be achieved with all-solid-state devices. In this paper, we describe the development of IL-supplied conducting-bridge random access memory (IL-CBRAM) whose operating mechanism is the Cu filament formation/rupture caused by redox reactions in ILs as an electrochemical reaction field. Although the introduction of liquids into solid-state processes is challenging, we successfully demonstrated the reproducible memory operation of IL-CBRAM with a Cu/SiO<sub>2</sub>/Pt structure and a microfabricated pore filled with IL in the SiO<sub>2</sub> layer. We also improved the wettability of the IL to SiO<sub>2</sub> by exposing it to Ar plasma, which was essential not only to obtain an IL thin film from the droplet but also to ensure pore filling by the IL before Cu deposition. The present device fabrication process for IL-CBRAM is highly reliable and compatible with conventional vacuum processes.https://ieeexplore.ieee.org/document/9419034/Artificial intelligenceInternet of Thingsrandom access memoryvacuum technology |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hiroshi Sato Hisashi Shima Yusei Honma Yasuhisa Naitoh Hiroyuki Akinaga Toshiki Nokami Toshiyuki Itoh Kentaro Kinoshita |
spellingShingle |
Hiroshi Sato Hisashi Shima Yusei Honma Yasuhisa Naitoh Hiroyuki Akinaga Toshiki Nokami Toshiyuki Itoh Kentaro Kinoshita Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids IEEE Access Artificial intelligence Internet of Things random access memory vacuum technology |
author_facet |
Hiroshi Sato Hisashi Shima Yusei Honma Yasuhisa Naitoh Hiroyuki Akinaga Toshiki Nokami Toshiyuki Itoh Kentaro Kinoshita |
author_sort |
Hiroshi Sato |
title |
Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids |
title_short |
Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids |
title_full |
Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids |
title_fullStr |
Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids |
title_full_unstemmed |
Liquid-Solid Hybrid Memory Device Achieved by Unique Features of Ionic Liquids |
title_sort |
liquid-solid hybrid memory device achieved by unique features of ionic liquids |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2021-01-01 |
description |
Ionic liquids (ILs), non-volatile liquids composed of cations and anions, have various attractive properties for electronic devices, such as wide potential windows. Combining ILs with electronic devices is presumed to be able to provide new options for realizing a sustainable internet of things society because such liquid-solid hybrid devices have the capability to act as a key in realizing further possibilities that cannot be achieved with all-solid-state devices. In this paper, we describe the development of IL-supplied conducting-bridge random access memory (IL-CBRAM) whose operating mechanism is the Cu filament formation/rupture caused by redox reactions in ILs as an electrochemical reaction field. Although the introduction of liquids into solid-state processes is challenging, we successfully demonstrated the reproducible memory operation of IL-CBRAM with a Cu/SiO<sub>2</sub>/Pt structure and a microfabricated pore filled with IL in the SiO<sub>2</sub> layer. We also improved the wettability of the IL to SiO<sub>2</sub> by exposing it to Ar plasma, which was essential not only to obtain an IL thin film from the droplet but also to ensure pore filling by the IL before Cu deposition. The present device fabrication process for IL-CBRAM is highly reliable and compatible with conventional vacuum processes. |
topic |
Artificial intelligence Internet of Things random access memory vacuum technology |
url |
https://ieeexplore.ieee.org/document/9419034/ |
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