Patent ID: 9594050
Date: 2017-03-14
CPC Classifications: G01N

Claim:
1. A method of manufacturing an air-fuel (A/F) sensor, the air-fuel (A/F) sensor comprising: a substrate made of an insulating ceramic having a bottomed cylindrical shape with a closed distal end and an opened rear end; an electrolyte part made of a solid electrolyte; and a pair of electrodes; wherein, the insulating ceramics is made of a material having a higher thermal conductivity than the solid electrolyte; the electrolyte part is embedded in at least a portion of the side wall of the substrate to constitute a part of the sidewall; the pair of the electrode portion is formed on an inner surface and an outer surface of the side wall, respectively, and is formed at positions sandwiching the electrolyte part; the air-fuel (A/F) sensor element is used by inserting a rod-like heater in the substrate having the bottomed cylindrical shape; and the substrate is formed of the insulating ceramic at a contact position to the heater within the substrate, the method comprising: