Patent ID: 9689785
Date: 2017-06-27
CPC Classifications: G01N

Claim:
1. A metal oxide semiconductor gas sensor having a nanostructure, the metal oxide semiconductor gas sensor comprising: a substrate; a first electrode formed on the substrate; a gas sensing layer provided on the first electrode, made of a metal oxide semiconductor which has a nanostructure and of which electrical conductivity changes when the metal oxide semiconductor reacts with gas to be sensed, and formed by oblique angle deposition; a second electrode formed on the metal oxide semiconductor; and a control unit for measuring the electrical conductivity of the gas sensing layer to sense the gas by applying a predetermined amount of current through the first and the second electrodes, wherein the second electrode has a porous structure and the substrate is configured with a certain oblique angle with a flux direction of a deposition material when the second electrode is formed, and wherein the gas is sensed by easily flowing in and out of the second electrode.