Moisture sensitive resistive element

Details Moisture sensitive resistive element Moisture sensitive resistive element

1984-03-30

1985-07-09

Lesmes, George F.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

428913, 428210, 428201, H01L 700, B32B 1508, G01N 2564

Patent

active

045285438

ABSTRACT:
A moisture sensitive resistive element includes a substrate made of an electrically non-conductive material, first and second electrodes deposited on the substrate in a spaced relation to each other, and a moisture sensitive film deposited on the substrate covering both the first and second electrodes. The moisture sensitive film is formed by a material given by a formula: [--CH(C.sub.6 H.sub.4 SO.sub.3 X)--CH.sub.2 --].sub.n wherein X is any one of a hydrogen atom, metal atom, ammonium, urea, triethylenediamine, tetramethyleneguanidine and hexamethylenediamine, or formed by a mixture of the above material with a hydrophilic polymer which is any one selected from a group consisting of polyvinyl alcohol, methyl cellulose and polyamide resin.

REFERENCES:
patent: 2445586 (1948-07-01), Simons
patent: 2527300 (1950-10-01), Dudley
patent: 2908595 (1959-10-01), Kohl
patent: 2976188 (1961-03-01), Kohl
patent: 3265536 (1966-08-01), Miller et al.
patent: 3336271 (1967-08-01), Durocher
patent: 3453143 (1969-07-01), Meixner et al.
patent: 4386336 (1983-05-01), Kinomoto et al.

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