Patent ID: 6569303
Filing Date: 2003-05-27
Classification: G01N

Abstract:
A gas sensor output adjusting method comprising:preparing a gas sensor element including lamination of a solid electrolyte body, a target gas-exposed electrode, a reference gas-exposed electrode, and a diffusion resistance layer in which a target gas to be measured diffuses, the target gas-exposed electrode being disposed on a first surface of the solid electrolyte body to be exposed to the target gas, the reference gas-exposed electrode being disposed on a second surface of the solid electrolyte body to be exposed to a reference gas, the diffusion resistance layer having an outer surface to be exposed to the target gas, an inner surface opposite the outer surface, disposed on the first surface of the solid electrolyte body, and side surfaces formed between the outer and inner surfaces, defining portions of side surfaces of the lamination, the target gas-exposed electrode and the reference gas-exposed electrode producing a current output as a function of target gas concentration; exposing the target gas-exposed electrode to a predetermined concentration of target gas and exposing the reference gas-exposed electrode to reference gas; measuring the current output produced from the target gas-exposed electrode and the reference gas-exposed electrode; and decreasing diffusion length of the target gas in the diffusion resistance layer as a function of the measured current output by removing a portion of the diffusion resistance layer obliquely to at least one of the side surfaces of the lamination for adjusting the current output to a predetermined value corresponding to the predetermined target gas concentration.