公开(公告)号：US20170167995A1

公开(公告)日：2017-06-15

申请号：US15327103

申请日：2015-07-21

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Jin KAWAKITA ,  Tadashi SHINOHARA ,  Toyohiro CHIKYO ,  Toshihide NABATAME ,  Akihiko OHI ,  Tomoko OHKI

IPC: G01N27/04

CPC classification number: G01N27/048 ,  G01N17/00 ,  G01N17/04 ,  G01N27/045 ,  G01N27/121 ,  G01N27/223

Abstract: The present invention improves the sensitivity and the responsiveness of a dryness/wetness responsive sensor utilizing a galvanic current, allowing for downsizing of the dryness/wetness responsive sensor. Instead of the conventional structure in which an anode electrode and a cathode electrode are stacked with an intervening insulator, the present invention employs a structure in which both electrodes run in juxtaposition with each other on an insulating substrate in the form of, for example, a comb-shaped electrode as shown in the drawing. By utilizing a semiconductor manufacturing process or any other micro/nano-fabrication technology, an inter-electrode distance can be extremely shortened as compared with the conventional sensors, allowing enhancing the sensitivity per unit footprint of the electrodes. Accordingly, a decrease in the size of the dryness/wetness responsive sensor can be easily achieved.

公开(公告)号：US20200249185A1

公开(公告)日：2020-08-06

申请号：US16640421

申请日：2018-08-23

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Jin KAWAKITA ,  Akihiko OHI ,  Tomoko OHKI ,  Naoki IKEDA ,  Toshihide NABATAME ,  Toyohiro CHIKYO

IPC: G01N27/04

Abstract: The present invention is to provide a small-sized dryness/wetness responsive sensor that detects a galvanic current with a high sensitivity as a principle of operation. According to one embodiment of the present invention, a dryness/wetness responsive sensor comprises a thin wire made of a first metal and a thin wire made of a second metal, the second metal is different from the first metal, the thin wire of the first metal and the thin wire of the second metal are disposed in juxtaposition with each other on an insulating substrate, and a surface state of a part between the thin wire of the first metal and the thin wire of the second metal is hydrophilic or hydrophobic.

公开(公告)号：US20190145920A1

公开(公告)日：2019-05-16

申请号：US16225087

申请日：2018-12-19

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Jin KAWAKITA ,  Tadashi SHINOHARA ,  Toyohiro CHIKYO ,  Toshihide NABATAME ,  Akihiko OHI ,  Tomoko OHKI

IPC: G01N27/04 ,  G01N27/12 ,  G01N27/22 ,  G01N17/04

Abstract: The present invention improves the sensitivity and the responsiveness of a dryness/wetness responsive sensor utilizing a galvanic current, allowing for downsizing of the dryness/wetness responsive sensor. Instead of the conventional structure in which an anode electrode and a cathode electrode are stacked with an intervening insulator, the present invention employs a structure in which both electrodes run in juxtaposition with each other on an insulating substrate in the form of, for example, a comb-shaped electrode as shown in the drawing. By utilizing a semiconductor manufacturing process or any other micro/nano-fabrication technology, an inter-electrode distance can be extremely shortened as compared with the conventional sensors, allowing enhancing the sensitivity per unit footprint of the electrodes. Accordingly, a decrease in the size of the dryness/wetness responsive sensor can be easily achieved.