Humidity sensitive resistance device

Details Humidity sensitive resistance device Humidity sensitive resistance device

1982-10-26

1984-05-22

Shaw, C. C.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

338308, 733365, 252520, H01L 700

Patent

active

044504292

ABSTRACT:
A humidity sensitive resistance device, including opposing electrodes (102, 103) formed on an insulating substrate (101), and a humidity sensitive resistance film (104) formed on the surface of the insulating substrate (101) and at least between the opposing electrodes (102, 103). The resistivity of the humidity sensitive resistance film (104) increases with an increase of an ambient relative humidity. The humidity sensitive resistance film (104) comprises a hydrophilic polymer and a conductive powder, and has a zirconium compound unevenly distributed on the side of surface thereof. The surface of the humidity sensitive resistance film (104) is dehydrated by contact with an alkaline solution or by heating.

REFERENCES:
patent: 3671913 (1983-06-01), Mariya et al.
patent: 4263576 (1981-04-01), Murata et al.
patent: 4374760 (1983-02-01), Charles

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