Chemical sensors and their divided parts

Details Chemical sensors and their divided parts Chemical sensors and their divided parts

1988-10-13

1992-01-07

Simmons, David A.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204412, 204416, 357 25, 422 681, 422 8201, G01N 2730

Patent

active

050788558

ABSTRACT:
A chemical sensor includes a field effect-type transistor. An extended gate electrode is connected to a gate electrode of the transistor. A sensitive membrane is provided on at least a part of the extended gate electrode. The sensor also includes a reference electrode. Both the extended gate and reference electrodes are formed on a substrate different from the substrate on which the transistor is formed. Divided parts for the chemical sensor wherein the parts of the sensor except for the reference electrode are made independent are also disclosed and claimed. Sensors for simultaneously sensing a number of different chemical substances in a single sample are also disclosed and claimed.

REFERENCES:
patent: 4508613 (1985-04-01), Busta et al.
patent: 4739380 (1988-04-01), Lauks et al.
patent: 4764797 (1988-08-01), Shaw et al.
patent: 4816118 (1989-03-01), Oyama et al.
patent: 4921591 (1990-05-01), Mochizuki et al.

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