Bio-sensor using ion sensitive field effect transistor with plat

Details Bio-sensor using ion sensitive field effect transistor with plat Bio-sensor using ion sensitive field effect transistor with plat

1993-04-15

1995-02-07

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204416, 204418, 435288, 435817, G01N 2726

Patent

active

053873289

ABSTRACT:
A bio-sensor employs an ion senstive field effect transistor (ISFET) comping a source 1 and a drain 3 formed in a substrate, an ion sensitive gate 2 placed between the source 1 and drain 3, an ion sensitive film 4 formed on the ion sensing gate 2, an immobilized enzyme membrane 5 defined on the ion sensitive film 4 and, a Pt electrode 6 formed on the ion sensitive film 4. The sensor has a Pt eleletrode being capable of sensing all biological substances which generate H.sub.2 O.sub.2 in enzyme reaction, whereby having the high sensitivity and the rapid reaction time.

REFERENCES:
patent: 4839000 (1989-06-01), Eddowes
patent: 4894137 (1990-01-01), Takizawa et al.
patent: 4970145 (1990-11-01), Bennetto et al.

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