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US 9,070,060 B2Granted
RFID wetness sensing device
AssigneeAvery Dennison Corporation
InventorIan J. Forster
Life of this patent
Estimating the term…
Abstract
The present invention relates to a RFID tag having sensing capabilities. The RFID device includes an antenna section and a sensor patch section. The antenna is coupled to a chip. The sensor patch section upon exposure to an environmental condition causes the RFID device to change from a first operating condition to a second operating condition.
Claims16
A RFID sensor device, comprising:
- a substrate, having a first and second face;
- and
- a RFID antenna section and sensor patch section, disposed on the first face of the substrate, the two sections interact to create a match between the antenna section and a RFID chip impedance at a desired operating frequency;
- and
- wherein the sensor patch section is an inter-digital capacitor structure covered by a layer of PET material;
- and
- wherein the sensor patch section tapers from a first wide end away from the RFID antenna section to more narrow closer to the RFID antenna section.
4 more elements
A RFID sensor device, comprising:
- a substrate having a first face and a second face;
- an antenna pattern section disposed on the first face, the antenna pattern section having a plurality of cuts to define an operating frequency;
- a chip connected to the antenna pattern section;
- and
- a sensor patch section disposed on the first face of the substrate and in operative association with the antenna pattern;
- and
- wherein the sensor patch, upon exposure to an environmental condition, causes the RFID device to change from a first operating condition to a second operating condition distinct from the first operating condition;
- and wherein the sensor patch section is an inter-digital capacitor structure;
- and
- wherein the sensor patch section tapers from a first wide end away from the antenna pattern to more narrow closer to the antenna pattern section and the sensor patch section is perpendicular to the antenna pattern section.
7 more elements
A RFID sensor device, comprising:
- a RFID antenna section and sensor patch section, wherein the sensor patch section is customized by a plurality of cuts to alter a sensing response;
- and wherein the sensor patch section tapers from a first wide end away from the RFID antenna section to more narrow closer to the RFID antenna section with the sensor patch section is perpendicular to the antenna pattern section, and the sensor patch section is covered by a layer of PET material.
A method of manufacturing a RFID sensor device, comprising:
- providing a substrate;
- placing a conductive material on the substrate;
- patterning the conductive material by an on demand laser to form one of a sensor or antenna pattern, wherein the conductive material tapers from a first wide end away from the antenna pattern to more narrow closer to the antenna pattern and the sensor patch section is perpendicular to the antenna pattern section;
- and
- printing over at least one of the sensor or antenna pattern with a material to provide enhanced sensitivity or performance.
2 more elements
Dependencies are inferred from the claim text.