Patent ID: 8287706
Filing Date: 2012-10-16
Classification: G01N

Abstract:
1. A laminated gas sensor element for detecting a gas component contained in a gas to be measured, comprising: a detection element comprising a solid electrolyte body having thereon a pair of electrodes; and a heater element containing a heat-generating resistor, wherein the detection element is laminated together with the heater element, a porous protection layer is formed on at least a distal end portion of the laminated gas sensor element which is to be exposed to the gas to be measured; and an outer surface of the porous protection layer has 10 or more small pores each having a diameter of 1 μm to 5 μm inclusive and an aspect ratio of 0.5 to 2.0 inclusive within an area measuring 50 μm×50 μm, and one to less than 20 large pores each having a diameter of 8 μm to 20 μm inclusive and an aspect ratio of 0.5 to 2.0 inclusive within an area measuring 100 μm×100 μm.