Yokogawa Electric Corporation

Waseda University

Yukihiro Shintani

Hiroshi Kawarada

Kazuma Takenaka

Kotaro Ogawa

Toshiyuki Saruya

Keisuke Igarashi

Masafumi Inaba

Yutaro Iyama

Miki Kajiya

Mohd Sukri Shaili Falina Binti

Kaito Tadenuma

Takuro Naramura

Sukri Shaili Falina Binti Mohd

The invention is to provide an underwater communication device and an underwater communication method that can be applied to mobile communication in water. An underwater communication deviceincludes: a transmitterconfigured to transmit an electric signal; and a receiverarranged away from the transmittervia water and configured to receive the electric signal, in which the receiverincludes an field effect transistorhaving a channel regionprovided at a position in contact with the water, and a drive circuitconfigured to generate a potential difference between a source regionand a drain regionof the field effect transistor

Underwater communication device and underwater communication method

An electronic component includes a field effect transistor that functions as a working electrode of an ion sensor and a driving circuit that causes a potential difference between a source electrode and a drain electrode of the field effect transistor. A reference electrode potential of the field effect transistor is fixed.

Ion sensor, ion concentration measurement method, and electronic component

A method for treating a surface of a diamond thin film according to one aspect of the present invention performs one of a first substitution process for substituting part of hydrogen-terminals of a diamond thin film with fluorine-terminals in the absence of a fluorocarbon deposition on the surface of diamond thin film and a second substitution process for substituting part of hydrogen-terminals of a diamond thin film with fluorine-terminals in the presence of the fluorocarbon deposition on the surface of diamond thin film based on required surface properties of the diamond thin film.

Method for treating surface of diamond thin film, method for forming transistor, and sensor device

A pH sensor may include a reference electrode including a p-channel field effect transistor (FET) whose gate includes a diamond surface having a hydrogen ion insensitive terminal, and a working electrode.

PH sensor, pH measurement method, ion sensor, and ion concentration measurement method

pH sensor, pH measurement method, ion sensor, and ion concentration measurement method

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Tokyo, Japan

Yukihiro Shintani