Three-terminal nanometer metal switches utilizing solid electrolytes

Hisao Kawaura*, Toshitsugu Sakamoto, Naoki Banno, Shunichi Kaeriyama, Masayuki Mizuno, Kazuya Terabe, Tsuyoshi Hasegawa, Masakazu Aono

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We propose a three-terminal nanometer metal switch that utilizes a solid electrolyte where a nanoscale metal filament is stretched and retracted. Its operating principle is based on electrochemical reaction and ion migration in the electrolyte. The fabricated device is composed of a solid electrolyte layer (Cu2S), a gate (Cu), a source (Cu), and a drain (Pt). After the Cu filament is formed between the source and the drain by applying the drain voltage, repeatable on/off switching in the drain current is obtained by controlling the gate voltage. The on/off current ratio can be as high as 10 5, and the programmable cycle is around 50. Each state can be kept for up to 40 days. Since the gate is separated from the current path, the switching current can be reduced to 10 μA, which is two orders of magnitude smaller than that of a two-terminal switch. In this paper, we present the operating principle and electrical characteristics of the three-terminal switches, and discuss how suitable they are for reconfigurable circuits.

Original languageEnglish
Pages (from-to)55-61
Number of pages7
JournalElectronics and Communications in Japan
Issue number4
Publication statusPublished - 2011 Apr
Externally publishedYes


  • electrochemical reaction
  • reconfigurable circuit
  • solid electrolyte

ASJC Scopus subject areas

  • Signal Processing
  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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