Semiconductor sensing device for fluids

Details Semiconductor sensing device for fluids Semiconductor sensing device for fluids

1975-02-14

1976-12-21

Segal, Robert

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Erosion

73 27R, 200 6104, 23232E, 338 13, 23230B, 23254E, G01N 2752

Patent

active

039991229

ABSTRACT:
A semiconductor sensor for fluids comprised of a body composed of an inorganic semiconductor material which is provided with a drain and source zone interconnected by a channel zone and including a layer of a reactive organic material capable of forming a reversible bond with at least a portion of the fluid being detected in the vicinity of the channel zone between the source and drain zones. The reactive organic material, such as carotenoids, polypropylenes, phthalocyanines, etc. reversably interacts with molecules of a given fluid substance and produce a reversible change in the surface potential of the layer composed of the organic material via a field effect and thus produce a reversible change of resistance in the channel zone and indicates the presence of such fluid by a change in the drain current of the sensor.

REFERENCES:
patent: 3045198 (1962-07-01), Dolan et al.
patent: 3255324 (1966-06-01), Ovshinsky
patent: 3428892 (1969-02-01), Meinhard
patent: 3831432 (1974-08-01), Cox
patent: 3865550 (1975-02-01), Bott et al.

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