Patent ID: 8176618

Claim:
A method for producing a gas sensor comprising a sensor element for detecting a concentration of a specific gas component in a measurement gas, said sensor element having a rectangular solid structure of a solid electrolyte body containing a ceramic material, said method comprising: using a positioning jig that includes a first plate, a second plate nonparallel to said first plate, and a space formed between said first plate and said second plate, an end surface of said first plate being located in the vicinity of an end surface of said second plate; using first and second press jig mechanisms to clamp said solid electrolyte body against said first and second plates, respectively, such that a major surface of said solid electrolyte body is in contact with said first plate, a side surface thereof is in contact with said second plate, and an edge between said major surface and said side surface protrudes from said space; and holding said solid electrolyte body stationary while sliding a heated cutter in the longitudinal direction of said edge protruding from said space to chamfer said edge, wherein said solid electrolyte body is heated at least to the glass transition point temperature of the ceramic material prior to chamfering said edge.