Patent ID: 11867656
Assignee: ROHM CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A limiting-current type gas sensor, comprising:
a solid electrolyte;
a first electrode disposed on the solid electrolyte;
a second electrode disposed on the solid electrolyte;
a gas feed passage extending between a gas inlet and a first portion of the first electrode, the first portion facing the solid electrolyte;
a first insulating layer disposed on each of the first electrode, a side surface of the gas feed passage, an upper surface of the solid electrolyte, and a side surface of the solid electrolyte; and
a second insulating layer disposed on the first insulating layer, wherein
the first insulating layer and the second insulating layer include an opening,
the opening corresponds to the gas inlet,
the first electrode is a first porous metal electrode,
the gas feed passage is a layer formed of a first porous transition metal oxide having a second melting point higher than a first melting point of the first electrode, and
the first porous transition metal oxide is Ta2O5, TiO2, or Cr2O3.