CHEMICAL-SELECTIVE DEVICE
First Claim
1. An electrical device for detecting an item of interest in a detector card, the electrical device comprising:
- a detection material sensitive to exposure to the item of interest, wherein;
at least one surface of the detection material is configured to be exposed to items external to the electrical device,an electrical characteristic of the detection material is altered after exposure to the item of interest, andthe item of interest comprises a chemical and/or biologic compound;
a semiconductor material, wherein;
the semiconductor material is adjacent to the detection material, andthe semiconductor material is configured to comprise part of a diode or a transistor; and
a plurality of electrical terminals configured to provide electrical current through at least a portion of the detection material and the semiconductor material.
1 Assignment
0 Petitions
Accused Products
Abstract
A smartcard or other media that detects the presence of chemical and/or biological compounds or other items of interest on individuals handling by using chemical-selective devices. These chemical-selective devices can include non-linear (e.g., diode and/or transistor) and/or time non-linear (e.g., controlled resistor) electrical components and can indicate exposure to an item of interest through a change in one or more electrical characteristics. The exposure of the chemical-selective devices to items of interest is stored such that, when the smartcard or other media is presented to a card reader, the detection data can be transmitted to the card reader for appropriate processing by the system.
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Citations
22 Claims
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1. An electrical device for detecting an item of interest in a detector card, the electrical device comprising:
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a detection material sensitive to exposure to the item of interest, wherein; at least one surface of the detection material is configured to be exposed to items external to the electrical device, an electrical characteristic of the detection material is altered after exposure to the item of interest, and the item of interest comprises a chemical and/or biologic compound; a semiconductor material, wherein; the semiconductor material is adjacent to the detection material, and the semiconductor material is configured to comprise part of a diode or a transistor; and a plurality of electrical terminals configured to provide electrical current through at least a portion of the detection material and the semiconductor material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A detection circuit for detecting exposure to an item of interest, the detection circuit comprising:
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a first detection device having a first element sensitive to the item of interest, wherein; the first element is configured to be exposed to items external to the first detection device, an electrical characteristic of the first element is altered after exposure to the item of interest, the first detection circuit can detect if the first element has been exposed to the item of interest, and the item of interest comprises a chemical and/or biologic compound; and a second detection device that includes a second element sensitive to the item of interest, wherein the second element sensitive to the item of interest is protected from exposure to items external to the second detection device; and a power source electrically coupled with the first detection device. - View Dependent Claims (10, 11, 12, 13)
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14. A method of manufacturing a device for detecting an item of interest, the method comprising:
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forming, on a substrate, a region of detection material sensitive to exposure to the item of interest, wherein; at least one surface of the detection material is configured to be exposed to items external to the electrical device, an electrical characteristic of the detection material is altered after exposure to the item of interest, and the item of interest comprises a chemical and/or biologic compound; forming, on a substrate, at least one region of semiconductor material, wherein; the semiconductor material is adjacent to the detection material, and the semiconductor material is configured to comprise part of a diode or a transistor; and forming, on the substrate, at least one region of conductive material electrically coupled with the detection material and the semiconductor material. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification