Gas sensor and sensor device

Patent metadata

Field	Value
Publication number	US-12105046-B2
Application number	US-202318207051-A
Country	US
Kind code	B2
Filing date	Jun 7, 2023
Priority date	Jun 9, 2014
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A gas sensor which includes a solid electrolyte layer including positive charge carriers to which detection-target gas coordinates, an electrode arranged on part of a plane of the solid electrolyte layer, and a unit configured to accelerate movements of the positive charge carriers.

First claim

What is claimed is:

1. A gas sensor comprising:
a solid electrolyte layer including positive charge carriers to which detection-target gas is to coordinate and has a contact plane to be in contact with the detection-target gas;
a first electrode and a second electrode, both of which are arranged on a plane of the solid electrolyte layer opposite to the contact plane of the solid electrolyte layer; and
a unit configured to accelerate movements of the positive charge carriers, where the movements of the positive charge carriers are movements in a plane direction of the solid electrolyte layer and in a direction from the second electrode to the first electrode within the solid electrolyte layer,
wherein the unit configured to accelerate movements of the positive charge carriers is arranged on at least part of a plane of the solid electrolyte layer to be in contact with the detection-target gas, and the unit is a layer covering the solid electrolyte layer,
wherein thickness or density of the layer covering the solid electrolyte layer varies from the first electrode toward the second electrode.

2. The gas sensor according to claim 1 ,
wherein the layer covering the solid electrolyte layer is a layer that includes a material capable of coordinating to the positive charge carriers and allows the detection-target gas to pass therethrough.

3. The gas sensor according to claim 2 ,
wherein the material capable of coordinating to the positive charge carriers is an organic material including a carbon-carbon double bond.

4. The gas sensor according to claim 3 ,
wherein the organic material including a carbon-carbon double bond is polyisoprene rubber, natural rubber, or polybutadiene rubber.

5. The gas sensor according to claim 1 ,
wherein the positive charge carriers are copper ions, or silver ions, or both copper ions and silver ions.

6. The gas sensor according to claim 1 ,
wherein the positive charge carriers are copper ions.

7. The gas sensor according to claim 1 ,
wherein a material of the solid electrolyte layer is copper (I) bromide, copper (I) sulfide, silver sulfide, silver iodide, or silver rubidium iodide.

8. The gas sensor according to claim 1 ,
wherein a material of the solid electrolyte layer is copper (I) bromide.

9. A sensor device comprising:
the gas sensor according to claim 1 ; and
a unit configured to detect a change in a potential difference of the gas sensor, where the unit configured to detect a change in a potential difference of the gas sensor is connected to the first electrode of the gas sensor.

10. The sensor device according to claim 9 , wherein the unit configured to detect a change in a potential difference of the gas sensor is a field-effect transistor.

Assignees

• Fujitsu Ltd

Inventors

• Momose Satoru
• Tsuboi Osamu
• Soga Ikuo

Classifications

• G01N27/4065

  Circuit arrangements specially adapted therefor · CPC title

• G01N27/4073

  Composition or fabrication of the solid electrolyte · CPC title

• G01N27/4071 Primary

  using sensor elements of laminated structure · CPC title