Patent ID: 8734938

Claim:
A sensor element manufactured by a method comprising the steps of: (a) forming a predetermined circuit pattern on each of a plurality of ceramics green sheets; (b) forming a laminated body by laminating said plurality of ceramics green sheets on each of which said circuit pattern is formed; (c) defining a cutting order of a plurality of cutting positions previously defined for said laminated body, said cutting order being defined such that the cutting position is where a difference of resistance added to both side surfaces of a cutting edge of a cutting component is smallest at the time of cutting with said cutting component; (d) cutting out a plurality of elements from said laminated body, by cutting said laminated body with said cutting component in accordance with said cutting order; and (e) burning said plurality of elements which are cut out in said step (d), wherein said sensor element comprises a main component which is oxygen ion conductive solid electrolyte and said sensor element has an outline shape that is quadrilateral and extends perpendicular to a longitudinal direction of said sensor element, wherein when corners of said quadrilateral are A, B, C and D, respectively, the quadrilateral ABCD is a trapezoid having sides AD and BC which are substantially parallel to each other, and said corners A, B, C, and D have angles P 1 , P 2 , P 3 and P 4 , respectively, which are defined as: 0 °<P 2−90 °, P 3−90°≦1°, and 0°<90 °−P 1, 90 °−P 4≦1°, and wherein an inlet for introducing a measurement gas into the sensor element is arranged on a longitudinal end face of the sensor element, and wherein the inlet for introducing the measurement gas and an internal space are arranged in the same layer in the sensor element.