RFID tag having a silicon micro processing chip for radio frequency identification and a method of making the same

• US 20060055541A1
• Filed: 08/19/2005
• Published: 03/16/2006
• Est. Priority Date: 08/19/2004
• Status: Abandoned Application

• Current Assignee: Pittsfield Weaving Company Incorporated
• Original Assignee: Pittsfield Weaving Company Incorporated
• Inventors: Bleckmann, Frederick
• Application Number:
  US11/207,201
• Publication Number:
  US 20060055541A1
• Time in Patent Office: Days
• US Class Current: 340/572.700
• CPC Class Codes: G06K 19/027 the material being suitable for use as a textile, e.g. woven-based RFID-like labels designed for attachment to laundry items markings attached to laundry items in general D06F93/00
• 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 19/07756 the connection being non-galvanic, e.g. capacitive
• CPC Class Codes: G06K 19/07758 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
• CPC Class Codes: G06K 19/07767 the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00

Abstract

A RFID device includes a silicon micro processing chip having an IC antenna disposed on a substrate or other surface, such as a label, tag or coin. At least one secondary antenna is also positioned on the substrate. The IC antenna of the chip is positioned within a coupling distance of the at least one secondary antenna in an insulated manner to form a RF inlet. When the RF inlet is placed in proximity to a transmitting and receiving antenna of a RFID system, the transmitting and receiving antenna transmits an output signal to the secondary antenna, and the secondary antenna in turn transmits the output signal to the IC antenna to provide an electromagnetic connection therebetween. The signals of IC antenna and secondary antenna are tuned to emit a uniform return signal that is received by the antenna of the RFID system to transfer data from the chip hereto.

Claims

1. A RFID device comprising:

a silicon micro processing chip having a first antenna disposed on a substrate; and

at least one secondary antenna disposed on said substrate, said first antenna being disposed within coupling distance of said at least one secondary antenna in an insulated manner to form a RF inlet, wherein when said RF inlet is placed in proximity to a transmitting and receiving antenna of a RFID system said transmitting and receiving antenna transmits an output signal to said at least one secondary antenna, and said at least one secondary antenna transmits said output signal to said first antenna to provide an electromagnetic connection therebetween.

2. The RFID device of claim 1, wherein said micro processing chip includes RFID circuitry and said first antenna.

3. The RFID device of claim 1, wherein said silicon micro processing chip is disposed within said at least one secondary antenna.

4. The RFID device of claim 1, fiber comprising a plurality of secondary antenna.

5. The RFID device of claim 1, wherein said first antenna and said at least one secondary antenna have the same radio frequency.

6. The RFID device of claim 5, wherein said first and said at least one secondary antenna are coupled to transmit a uniform return signal, wherein said return signal is received by said transmitting and receiving antenna to transfer information between said micro processing chip and said RFID system.

7. The RFID device of claim 6, wherein said first antenna and said at least one second antenna are physically insulated from each other.

8. The RFID device of claim 7, wherein the coupling distance is a distance sufficient to provide the physical insulation between said first and said at least one secondary antenna, but still enable said first and said at least one secondary antenna to couple to transmit said return signal.

9. A RFID device comprising:

a silicon micro processing chip having a first antenna;

at least one secondary antenna disposed within a coupling distance of said first antenna in an insulated manner; and

a transmitting and receiving antenna that transmits an output signal to said at least one secondary antenna, and said at least one secondary antenna transmits said output signal to said first antenna to provide a connection therebetween.

10. The RFID device of claim 9, wherein said micro processing chip includes RFID circuitry and said first antenna.

11. The RFID device of claim 9, wherein said silicon micro processing chip is disposed within said at least one secondary antenna.

12. The RFID device of claim 9, further comprising a plurality of secondary antenna.

13. The RFID device of claim 9, wherein said first antenna and said at least one secondary antenna have the same radio frequency.

14. The RFID device of claim 13, wherein said first and said at least one secondary antenna are coupled to transmit a uniform return signal.

15. The RFID device of claim 14, wherein said transmitting and receiving antenna is disposed in a RFID system located at a location remote from said silicon micro processing chip, said return signal being received by said transmitting and receiving antenna to transfer information between said micro processing chip and said RFID system.

16. The RFID device of claim 15, wherein said first antenna and said at least one second antenna are physically insulated from each other.

17. The RFID device of claim 16, wherein the coupling distance is a distance sufficient to provide the physical insulation between said first and said at least one secondary antenna, but still enable said first and said at least one secondary antenna to couple to transmit said return signal.

18. The RFID device of claim 9, wherein the silicon micro processing chip is disposed on a RFID tag.

19. The RFID tag of claim 18, wherein said at least one secondary antenna is disposed on a label.

20. A method of forming a RFID device, comprising the steps of:

providing a silicon micro processing chip, said silicon chip having a first antenna;

positioning at least one secondary antenna on a substrate;

positioning said silicon micro processing strip on said substrate such that said first antenna is within a coupling distance of said at least one secondary antenna to form an RF inlet, said first and secondary antennas being insulated from each other,

providing a RFID system, said RFID system including a transmitting and receiving antenna;

positioning said RF inlet of said chip in the proximity of said RFID system; and

transmitting an output signal from said transmitting and receiving antenna such that said at least one secondary antenna receives the output signal and couples with the first antenna to provide a return signal that is received by the transmitting and receiver antenna of said RFID system to transfer data from the silicon micro processing chip to the RFID scanner.

21. The method of claim 20, wherein the step of positioning said micro processor strip comprises physically isolating said first antenna from said at least one secondary antenna.

22. The method of claim 20, wherein the step of positioning said at least one secondary antenna comprises positioning a plurality of secondary antenna on said substrate.

23. The method of claim 20, further comprising the step of tuning the radio frequencies of the first antenna and at least one secondary antenna to couple the antennas together to transmit a uniform return signal.

24. The method of claim 20, further comprising the step of positioning a RFID device within a label.