| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive gas sensor element having excellent water resistance and responsiveness, and a gas sensor using it. <P>SOLUTION: The gas sensor element 2 includes a bottomed cylindrical solid electrolyte body 21 having oxygen ion conductivity, a reference electrode 22 arranged on the inside surface 212 of the solid electrolyte body 21 and a measuring electrode 23 arranged on the outside surface 213 of the solid electrolyte body 21, and a protection layer 24 for covering the measuring electrode 23 and allowing transmission of gas to be measured. A leg part 202 having a linear contour line on the axial cross section S which is a parallel cross section to the axial direction of the gas sensor element 2, and a bottom part 201 having a curved contour line are formed on the tip side of the gas sensor element 2. In the protection layer 24, a film thickness at the bottom part 201 is thicker than a film thickness at the leg part 202. <P>COPYRIGHT: (C)2010,JPO&INPIT |
