公开(公告)号：US20220260519A1

公开(公告)日：2022-08-18

申请号：US17627248

申请日：2020-05-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro MIZUNO ,  Hiroo YAMAMOTO ,  Sho MORITA ,  Toshiki WAKAMORI

IPC: G01N27/414 ,  G01N33/00

Abstract: A smell detection device includes an ion sensor having a sensitive film and outputting an output signal in accordance with a potential change of the sensitive film, a substance adsorption film disposed on the sensitive film and changing its state by adsorbing a smell substance to be detected to cause the potential change of the sensitive film, and an adjuster acquiring the output signal of the ion sensor and adjusting a drive signal for driving the ion sensor to reduce an offset from a predetermined reference value in the output signal.

公开(公告)号：US20240219340A1

公开(公告)日：2024-07-04

申请号：US18608288

申请日：2024-03-18

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro MIZUNO ,  Hiroo YAMAMOTO ,  Sho MORITA ,  Toshiki WAKAMORI

IPC: G01N27/333 ,  G01N27/414

CPC classification number: G01N27/333 ,  G01N27/4141

Abstract: A smell sensor includes an ion sensor having a sensitive film, a substance adsorption film disposed on the sensitive film and configured to adsorb a smell substance to be detected, and an electrode configured to apply a reference voltage to the substance adsorption film. The substance adsorption film is in a state of releasing a proton in response to absorbing the smell substance.

公开(公告)号：US20220244214A1

公开(公告)日：2022-08-04

申请号：US17627259

申请日：2020-05-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro MIZUNO ,  Hiroo YAMAMOTO ,  Sho MORITA ,  Toshiki WAKAMORI

IPC: G01N27/30 ,  G01N27/413 ,  G01N27/00

Abstract: An ion detection device includes an ion sensor having a sensitive film immersed in an aqueous solution and outputting an output signal in accordance with a potential change of the sensitive film, and an adjuster acquiring the output signal of the ion sensor and adjusting a drive signal for driving the ion sensor to reduce an offset from a predetermined reference value in the output signal.

公开(公告)号：US20220196593A1

公开(公告)日：2022-06-23

申请号：US17605263

申请日：2020-02-13

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro MIZUNO ,  Hiroo YAMAMOTO ,  Sho MORITA ,  Toshiki WAKAMORI

IPC: G01N27/333 ,  G01N27/414

Abstract: A smell sensor includes an ion sensor having a sensitive film, a substance adsorption film disposed on the sensitive film and configured to adsorb a smell substance to be detected, and an electrode configured to apply a reference voltage to the substance adsorption film. The substance adsorption film is in a state of releasing a proton in response to absorbing the smell substance.

公开(公告)号：US20210262975A1

公开(公告)日：2021-08-26

申请号：US17255014

申请日：2019-05-27

Applicant: HAMAMATSU PHOTONICS K.K. ,  National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY

Inventor： Toshiki WAKAMORI ,  Shinichi NAKAHIGASHI ,  Kazuaki SAWADA

IPC: G01N27/414 ,  G01N33/00

Abstract: A smell sensor includes an ion sensor in which a sensing section provided with a sensitive film configured to change a potential in accordance with a state of a measurement target is formed on a semiconductor substrate; a substance adsorption film disposed on the sensitive film and configured to change the state with adsorption of a smell substance; and a reference electrode configured to apply a reference voltage to the substance adsorption film. The reference electrode is disposed to be separated from the sensitive film and not to overlap the sensing section when viewed in a thickness direction of the semiconductor substrate.

公开(公告)号：US20240060930A1

公开(公告)日：2024-02-22

申请号：US18267940

申请日：2021-09-22

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Toshiki WAKAMORI ,  Shinichi NAKAHIGASHI

IPC: G01N27/414

CPC classification number: G01N27/414

Abstract: The ion sensor includes a substrate and a plurality of detection units. Each detection unit includes an ID portion, an ICG electrode, a TG electrode, an SG electrode, an electrode pad, and an ion sensitive film. The SG electrode is disposed between the ICG electrode and the TG electrode on the main surface of the substrate. The electrode pad is electrically connected to the SG electrode and disposed on the opposite side of the SG electrode from the substrate. The ion sensitive film is provided on the surface of the electrode pad, and changes a potential according to change in ion concentration of the aqueous solution in contact with the ion sensitive film. A width of the ion sensitive film in a facing direction in which the ICG electrode and the TG electrode face each other is greater than a separation width between the ICG electrode and the TG electrode.

公开(公告)号：US20190391110A1

公开(公告)日：2019-12-26

申请号：US16481979

申请日：2018-02-08

Applicant: National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY ,  HAMAMATSU PHOTONICS K.K.

Inventor： Kazuaki SAWADA ,  Hiroo YAMAMOTO ,  Seiichiro MIZUNO ,  Toshiki WAKAMORI

IPC: G01N27/414 ,  G01N27/22

Abstract: An ion concentration distribution measurement device includes a unit detection element for outputting charges of an amount according to an ion concentration, and an integration circuit for outputting a signal value according to the amount of charges which are output from the unit detection element. The unit detection element includes a MOS transistor, an ion sensitive portion, a first capacitive portion, and a transfer switch. The integration circuit includes an amplifier, a second capacitive portion, and a reset switch.