RFID device with changeable characteristics
View Patent ↗An RFID device includes a first, relatively permanent portion and a second alterable or inactivatable portion. Upon the occurrence of some predetermined event, the second portion and/or its coupling to the first portion is physically altered, inactivating it. The first portion may itself be an antennaless RFID device that may be read at short range, and the second portion may be an antenna that, when coupled to the first portion, substantially increases the range at which the first portion may be read. The second portion may be configured to be altered or inactivated by any of a variety of predetermined events, such as involving physical, chemical or electrical forces, performed either on the RFID device, or upon an object to which the RFID device is coupled.
1. A radio frequency identification (RFID) device comprising:
a substrate;
a transponder chip; and
an antenna coupled to the chip;
wherein the chip is part of an antennaless device coupled to the antenna;
wherein the antennaless device and the antenna are decoupled upon occurrence of a predetermined event;
wherein the antennaless device remains readable when decoupled from the antenna;
wherein the device includes an alterable portion that is altered upon a predetermined event; and
wherein the alterable portion includes substantially all of a substrate of the device.
2. The device of claim 1 , wherein the predetermined event is a physical force event that includes applying a physical force to at least part of the device.
3. The device of claim 1 , wherein the alterable portion includes at least a portion of the antenna.
4. The device of claim 3 , wherein the alterable portion includes substantially all of the antenna.
5. The device of claim 1 , wherein the alterable portion includes a soluble material that is altered by exposure to a suitable solvent.
6. The device of claim 5 , wherein the soluble material is a water-soluble material.
7. The device of claim 6 , wherein the predetermined event includes laundering an object to which the device is coupled.
8. The device of claim 7 , wherein the soluble material includes a material that is soluble in a mixture of water and a laundry detergent.
9. The device of claim 5 , wherein the soluble material includes a material that is soluble when the solvent is in a predetermined temperature range.
10. The device of claim 5 , wherein the soluble material includes a material that is soluble in a dry cleaning fluid.
11. The device of claim 5 , wherein the soluble material includes a material that is soluble in carbon tetrachloride.
12. The device of claim 5 , wherein the soluble material includes a substrate material supporting at least part of the antenna.
13. The device of claim 5 , wherein the soluble material includes a soluble conductive material.
14. The device of claim 13 , wherein the soluble conductive material includes a soluble conductive ink.
15. The device of claim 1 , wherein the substrate includes a soluble material.
16. The device of claim 15 , wherein the soluble material includes a water-soluble material.
17. The device of claim 1 , wherein alteration changes an operating frequency of the device.
18. The device of claim 1 , in combination with an object to which the device is coupled.
19. The combination of claim 18 , wherein the predetermined event is an event associated with use of the object.
20. The device of claim 1 , wherein the chip is connected to conductive leads as part of an interposer.