Usage modification of RFID transponder

• US 20050068180A1
• Filed: 07/12/2004
• Published: 03/31/2005
• Est. Priority Date: 07/10/2003
• Status: Active Grant

• Current Assignee: SMARTRAC Investment B.V. (Avery Dennison Corporation)
• Original Assignee: Upm Raflatac Oy (UPM-Kymmene Oyj)
• Inventors: Miettinen, Jarkko, Hanhikorpi, Marko
• Granted Patent: US 7,469,126 B2
• Time in Patent Office: Days
• US Class Current: 340/572.100
• CPC Class Codes: G06K 19/073 Special arrangements for circuits, e.g. for protecting identification code in memory protection against unauthorised use of computer memory G06F12/14
• CPC Class Codes: G06K 19/0739 the incapacitated circuit being part of an antenna
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07798 part of the antenna or the integrated circuit being adapted for rupturing or breaking, e.g. record carriers functioning as sealing devices for detecting not-authenticated opening of containers electronic seals G09F3/03
• CPC Class Codes: G08B 13/2414 using inductive tags
• CPC Class Codes: G08B 13/2417 having a radio frequency identification chip
• CPC Class Codes: G08B 13/2434 Tag housing and attachment details
• CPC Class Codes: G08B 13/2437 Tag layered structure, processes for making layered tags

Abstract

An RFID transponder is disclosed in which predetermined conductive portions will be removed from the transponder should the transponder be removed from a first object to which it is attached. The transponder has a first response to applied RF before the predetermined portions are removed and a second response after such removal. An RF detector can be used to scan objects with transponders to detect the first or the second response and thereby determine when a transponder has been moved.

Claims

1. An identifier for attachment to an object, comprising:

a substrate having a first electrically conductive portion of an RFID transponder adhered thereto by a first strength of adhesion;

a second electrically conductive portion of an RFID transponder in proximity to and in electrical communication with the first portion;

an adhesive layer for adhering the second portion to an object such that when the identifier is removed from the object the first portion remains adhered to the substrate and the second portion remains adhered to the object to interrupt the electrical communication between the first and second portions.

2. An identifier according to claim 1 wherein the identifier exhibits a first response to radio frequency signals when the first portion is in electrical communication with the second portion and exhibits a second response, different from the first response, when the electrical communication is interrupted.

3. An identifier according to claim 2 wherein the first response is resonance at a first predetermined range of frequencies and the second response is resonance at a second range of frequencies.

4. An identifier according to claim 2 wherein the first response and the second response exhibit a different Q.

5. An identifier according to claim 1 wherein the electrical communication between the first portion and the second portion includes an ohmic connection.

6. An identifier according to claim 1 wherein the electrical communication between the first and the second portion includes a reactive connection.

7. An identifier according to claim 6 wherein the reactive connection comprises a capacitive connection.

8. An identifier according to claim 6 wherein the reactive connection comprises an inductive connection.

9. An identifier according to claim 1 comprising an intermediate adhesive between the first portion and the second portion.

10. An identifier according to claim 9 wherein the adherence of the intermediate adhesive between the first portion and the second portion is less than the adherence of the first portion and the substrate.

11. An identifier according to claim 10 wherein the adherence of the intermediate adhesive between the first portion and the second portion is less than the adherence of the second portion to the object.

12. An identifier according to claim 1 wherein the object is a compact disk.

13. An identifier according to claim 1 wherein the object is a DVD.

14. An identifier according to claim 1 comprising a dielectric layer between the first portion and the second portion.

15. Apparatus for detecting an identifier of claim 2 which has been removed from an object by exposing the identifier to radio frequency energy and detecting the second response.

16. Apparatus for detecting an identifier of claim 3 which has been removed from an object and detecting resonance in the second range of frequencies.

17. Apparatus for detecting an identifier of claim 4 which has been removed from an object and detecting the Q exhibited by the identifier.