Sensor element and gas sensor
US11921078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2021 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Jun 6, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4078
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor element includes an element body and a porous protective layer arranged to cover a part of a surface of the element body. The protective layer includes an inlet protective layer arranged to cover a gas inlet formed in the surface of the element body, and at least a part of a face included in the surface of the element body, the face on which the gas inlet is opens, and an arithmetic average roughness Rap of an inner peripheral surface of an internal space of the inlet protective layer satisfies at least one of conditions below: the arithmetic average roughness Rap is 8 μm or more, and the arithmetic average roughness Rap is higher than an arithmetic average roughness Rac of a bonding surface of the protective layer, the bonding surface at which the protective layer is bonded to the element body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.