G - Physics
01
N
324/23
G01N 27/16 (2006.01) G01N 27/12 (2006.01)
Patent
CA 1164943
ABSTRACT OF THE DISCLOSURE: A gas detector of the type using an electric heater in which a substrate consists of an upper film of electrically insulating substance having a resistance to heat and a lower film of substance different from the substance of the upper film, a recess is formed below or under the upper film by removing part of the lower film, and a film of electrically conductive substance is deposited over the bridge of the upper film across the recess in the lower film, thereby providing a heating element characterized in that said heat- ing element consists of a film of a substance having catalytic effects in the presence of a gas to be detected deposited on said electrically conductive substance or a material responsive to a gas to be detected, or consists of said electrically conductive substance having catalytic effects in the presence o a gas to be detected or a substance containing said substance having catalytic effects in the presence of a gas to be detected or a substance responsive to a gas to be detected, and said heating element is exposed to a gas to be detected.
356948
Gowling Lafleur Henderson Llp
Kimura Mitsuteru
Ricoh Co. Ltd.
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