GAS SENSOR

PROBLEM TO BE SOLVED: To enhance the stability of the sensitive film of a gas sensor. SOLUTION: Conductive polymers and high-concentration dopants are dissolved in a solvent, a reagent which makes the dopants inert is added, a substrate on which an electrode is formed is coated with a solution, and...

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Bibliographic Details
Main Authors AOYAMA YOSHIHIRO, YOSHII MITSUYOSHI, KUYAMA HIROKI, KITA JUNICHI
Format Patent
LanguageEnglish
Published 16.03.1999
Edition6
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:PROBLEM TO BE SOLVED: To enhance the stability of the sensitive film of a gas sensor. SOLUTION: Conductive polymers and high-concentration dopants are dissolved in a solvent, a reagent which makes the dopants inert is added, a substrate on which an electrode is formed is coated with a solution, and a sensitive film is formed. First, the dopants 31 are introduced, at high density, into the doping site of the conductive polymers 30, and, after that, a part of them is made inert. Consequently, only the remaining dopants 31 contribute toward electric conduction, and their electric conductivity can be kept at a prescribed value. In addition, since the doping site of the conductive polymers 30 is filled with the dopants 31 and with inert dopants 32, it is possible to prevent a substance capable of becoming a dopant from being taken in undesirably in a gas analytical operation, and the electric conductivity is maintained stably.
Bibliography:Application Number: JP19970249918