Process for the production of a capacitive hygrometer

Details Process for the production of a capacitive hygrometer Process for the production of a capacitive hygrometer

1982-01-19

1984-11-13

Kittle, John E.

Coating processes

Electrical product produced

Condenser or capacitor

427 93, 4273835, 4273833, 4273831, 338 35, 361286, B05D 512, H01L 700

Patent

active

044825811

ABSTRACT:
The present invention relates to a process for producing a capacitive hygrometer, as well as to a hygrometer obtained by this process.
Onto a conductive layer forming the first electrode is deposited a layer of a material with a dielectric constant varying as a function of the quantity of water absorbed. Onto the said dielectric material layer is then deposited a layer with a thickness exceeding 200 .ANG. of a slightly oxidizable metal, which forms the second electrode. The latter is made permeable to water by heat treatment at a temperature close to the softening temperature of the dielectric.
Application to the measurement of the relative humidity of air.

REFERENCES:
patent: 4203087 (1980-05-01), Kovac

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