US 12,226,232 B2
Flexible device, method for producing flexible device
Toichiro Goto, Musashino (JP); Tetsuhiko Teshima, Musashino (JP); Hiroshi Nakashima, Musashino (JP); and Shingo Tsukada, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/605,789
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Apr. 8, 2020, PCT No. PCT/JP2020/015833
§ 371(c)(1), (2) Date Oct. 22, 2021,
PCT Pub. No. WO2020/217996, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-084556 (JP), filed on Apr. 25, 2019.
Prior Publication US 2022/0192601 A1, Jun. 23, 2022
Int. Cl. A61B 5/293 (2021.01); A61B 5/00 (2006.01); A61B 5/266 (2021.01); H01L 29/786 (2006.01); H10K 10/82 (2023.01); H10K 77/10 (2023.01); H10K 10/46 (2023.01)
CPC A61B 5/6868 (2013.01) [A61B 5/266 (2021.01); A61B 5/293 (2021.01); H01L 29/786 (2013.01); H10K 10/82 (2023.02); H10K 77/111 (2023.02); A61B 2562/125 (2013.01); H10K 10/471 (2023.02); H10K 10/481 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A flexible device comprising:
an insulating substrate;
a source electrode, a drain electrode, and an extended gate electrode formed on a surface of the insulating substrate at intervals, the extended gate electrode including a first portion and a tip portion extending away from the source electrode and the drain electrode, a dimension between the source electrode and the drain electrode to the tip portion being greater than 2 centimeters;
a channel arranged at an interval between the source electrode and the drain electrode; and
a gate dielectric formed so as to cover all of the channel and the first portion of the extended gate electrode,
wherein the insulating substrate is a flexible thin film having light transmissivity,
the extended gate electrode is a carbon material thin film having biocompatibility and light transmissivity,
the channel is an organic semiconductor thin film,
the gate dielectric is an ionic liquid or an ionic gel,
the tip portion of the extended gate electrode is configured to contact a tissue,
the flexible device is configured to measure the electrical signal of the tissue by measuring a change in drain current, and a drain voltage of the drain electrode is constant, a gate voltage of the extended gate electrode changes in response to a change in electrical signal of the tissue, and the drain current changes in response to the change in gate voltage.