Patent ID: 11933752
Assignee: NUVOTON TECHNOLOGY CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 0:
1. A gas sensor, comprising:
a gas-sensitive body layer disposed above a substrate and including a metal oxide layer;
a first electrode, of which bottom surface is disposed at a same level as a bottom surface of the gas-sensitive body layer, and is disposed above the substrate, and not disposed on an upper surface of the gas-sensitive body layer; and
a second electrode disposed at the same layer level as a layer level of the gas-sensitive body layer above the substrate or disposed on the gas-sensitive body layer, the second electrode being apart from the first electrode by a gap, wherein:
the gas-sensitive body layer has a resistance change characteristic that reversibly transitions to a high-resistance state and a low-resistance state on basis of a voltage applied across the first electrode and the second electrode,
at least a part of the gas-sensitive body layer is exposed to an area corresponding to the gap, and
the gas-sensitive body layer has a resistance that decreases when gas containing a hydrogen atom is in contact with the second electrode.