Patent ID: 6660142
Filing Date: 2003-12-09
Classification: G01N

Abstract:
A gas sensor element comprising:a solid electrolyte member having opposed surfaces; a measurement gas electrode disposed on one of the opposed surfaces of said solid electrolyte member, said measurement gas electrode being exposed to a gas to be measured; a reference gas electrode disposed on the other of the opposed surfaces of said solid electrolyte member, said reference gas electrode being exposed to a reference gas; and a heater laminated on said solid electrolyte member, said heater including a heater substrate, a heating element, and leads for supplying power to the heating element, the heating element and leads being disposed on the heater substrate, a minimum distance X between an edge of the heater substrate and an edge of the heating element meeting a relation of 0.1 mm&lE;X&lE;0.6 mm, wherein the heater substrate and the heating element each have a length, and wherein a minimum distance Y between a tip of the heater substrate and a tip of the heating element meets a relation of 1.0 mm&lE;Y&lE;2.5 mm.