US 12,174,051 B2
Electrode embedded ceramic structure
Takao Ohnishi, Niwa-Gun (JP); Daishi Tanabe, Kasugai (JP); and Akifumi Morishita, Komaki (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK Insulators, Ltd., Nagoya (JP)
Filed on Mar. 25, 2022, as Appl. No. 17/656,464.
Application 17/656,464 is a continuation of application No. PCT/JP2020/036887, filed on Sep. 29, 2020.
Claims priority of application No. 2019-183510 (JP), filed on Oct. 4, 2019.
Prior Publication US 2022/0214205 A1, Jul. 7, 2022
Int. Cl. G01F 23/263 (2022.01); C04B 37/02 (2006.01)
CPC G01F 23/268 (2013.01) [C04B 37/025 (2013.01); G01F 23/266 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sensor having an exposed detection surface, comprising:
a first ceramic layer;
an electrode layer formed on a surface of the first ceramic layer; and
a second ceramic layer having a surface as the exposed detection surface, covering the first ceramic layer and the electrode layer, the second ceramic layer being thinner than the first ceramic layer and having a thickness from 1 μm to 10 μm as a single layer between the detection surface and the electrode layer, the electrode layer being disposed directly between the first ceramic layer and the second ceramic layer,
wherein in a cross section of the first ceramic layer, the electrode layer, and the second ceramic layer along a laminating direction, T1 and T2 satisfy Equation (1) below, where T1 denotes a least thickness in the second ceramic layer on the electrode on the first ceramic layer, and T2 denotes an average thickness of the second ceramic layer on the electrode on the first ceramic layer:

OG Complex Work Unit Math