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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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
16.03.1999
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: JP19970249918 |