USING FLOATING GATE FIELD EFFECT TRANSISTORS FOR CHEMICAL AND/OR BIOLOGICAL SENSING
First Claim
1. A method for determining the presence or concentration of a target material in a medium, the method comprising:
- a) determining a current-voltage characteristic of a floating gate field effect transistor having a floating gate electrically coupled with a sensing material having a charge that changes in the presence of the target substance; and
b) determining a presence or concentration of the target substance based on the determined current-voltage characteristic.
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Accused Products
Abstract
Specific ionic interactions with a sensing material that is electrically coupled with the floating gate of a floating gate-based ion sensitive field effect transistor (FGISFET) may be used to sense a target material. For example, an FGISFET can use (e.g., previously demonstrated) ionic interaction-based sensing techniques with the floating gate of floating gate field effect transistors. The floating gate can serves as a probe and an interface to convert chemical and/or biological signals to electrical signals, which can be measured by monitoring the change in the device'"'"'s threshold voltage, VT.
162 Citations
16 Claims
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1. A method for determining the presence or concentration of a target material in a medium, the method comprising:
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a) determining a current-voltage characteristic of a floating gate field effect transistor having a floating gate electrically coupled with a sensing material having a charge that changes in the presence of the target substance; and b) determining a presence or concentration of the target substance based on the determined current-voltage characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for determining the presence or concentration of a target material in a medium, the apparatus comprising:
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a) means for determining a current-voltage characteristic of a floating gate field effect transistor having a floating gate electrically coupled with a sensing material having a charge that changes in the presence of the target substance; and b) means for determining a presence or concentration of the target substance based on the determined current-voltage characteristic. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification