FET electrode with carbon gate
First Claim
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1. A FET device comprising:
- a FET having a source, a drain, a channel for linking between the source and the drain and a gate for controlling current flow in the channel by field effect,an insulator over said channel of said FET, a carbon membrane coating said insulator and forming said gate, andan organic membrane formed on a surface of said carbon membrane by an electrolytic oxidative polymerization process.
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Abstract
The surface of a gate insulating membrane of an ion-selective field-effect transistor (ISFET) (10) is coated with a carbon thin membrane (4), and the surface of the latter is coated with an electrolytic polmerization membrane (3) of 2,6 xylenol. The ISFET obtained exhibits hydrogen-ion selectivity, little drift, high stability and little response to light. If the surface of the electrolytic polmerization membrane (3) of 2,6 xylenol is coated with another ion-selective membrane or enzyme-active membrane, various ions and the concentration of a biological substrate can be measured.
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Citations
11 Claims
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1. A FET device comprising:
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a FET having a source, a drain, a channel for linking between the source and the drain and a gate for controlling current flow in the channel by field effect, an insulator over said channel of said FET, a carbon membrane coating said insulator and forming said gate, and an organic membrane formed on a surface of said carbon membrane by an electrolytic oxidative polymerization process. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A FET device comprising
a FET having a source, a drain, a channel for linking between the source and the drain and a gate for controlling current flow in the channel by field effect, one of the source and the drain surrounding the other; -
an insulator over said channel of said FET; a carbon membrane coating a portion of said insulator far from both electrodes of the source and the drain and forming said gate; and an organic membrane formed on a surface of said carbon membrane by an electrolytic oxidative polymerization process. - View Dependent Claims (8, 9, 10, 11)
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Specification