RFID transponder and a method for fabricating the same

• US 9,076,092 B2
• Filed: 05/08/2009
• Issued: 07/07/2015
• Est. Priority Date: 05/08/2009
• Status: Expired due to Fees

• Current Assignee: Confidex Incorporated
• Original Assignee: Confidex Incorporated
• Inventors: Ritamaki, Matti, Ruhanen, Antti, Miettinen, Jarkko
• Primary Examiner(s): Le, Thien M
• Assistant Examiner(s): TAYLOR, APRIL ALICIA
• Application Number:
  US13/319,053
• Publication Number:
  US 20120056002A1
• Time in Patent Office: 2,251 Days
• Field of Search: 235/487, 235/492, 235/451
• US Class Current: 1/1
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/07786 the antenna being of the HF type, such as a dipole

Abstract

The present application provides a radio frequency identification (RFID) transponder and a method for fabricating the same. The RFID transponder, comprising: a microchip which is arranged to communicating with a reader; a battery which is arranged to provide an electrical power for operating the transponder, and is attached to the microchip by means of a conductive path; an antenna which is arranged to receive and backscatter radio frequency interrogation radiation; and a substrate, on which the microchip, the battery and the antenna are arranged.

Claims

1. A radio frequency identification (RFID) transponder, comprising:

a microchip having a capacitance coupled to an inductive loop for forming an appropriate inductance for a resonant circuit, the microchip which is arranged to communicate with a reader;

a battery which is arranged to provide an electrical power for operating the transponder, and is attached to the microchip by means of a conductive path;

an antenna which is arranged to receive and backscatter radio frequency interrogation radiation, wherein the battery acts as a ground plane for and is directly electrically coupled to the antenna; and

a substrate, on which the microchip, the battery and the antenna are arranged.

2. The transponder of claim 1, wherein the battery is integrated as a part of the antenna.

3. The transponder of claim 2, wherein the battery acts as a pole of the antenna when the antenna is a dipole antenna.

4. The transponder of claim 1, wherein the antenna is an inverted F antenna or a dipole antenna.

5. The transponder of claim 1, wherein the conductive path is a conductive wire, conductive glue or mechanical bond.

6. The transponder of claim 1, further comprising an encryption component, which is arranged to encode vehicle specific data with an encryption algorithm for preventing unauthorized use, cloning or counterfeiting of the RFID transponder.

7. The transponder of claim 1, wherein the microchip comprises:

both the analog part to modify the impedance matching of the antenna and the digital part which holds the logical functions and memory to enable the RFID functionalities according to the used air-interface standards.

8. The transponder of claim 1, wherein the substrate further comprising IC bonding area and contact area for battery.

9. The transponder of claim 1, wherein battery connection to the antenna or the microchip is done with mechanically crimping the layers to each other, by using conductive paste or film (ACP, ACF) or soldering.

10. The transponder of claim 1, wherein the transponder is primarily authenticated by utilizing the tag identification (TID) number which is unique for all microchips.

11. The transponder of claim 1, wherein the battery is attached to the antenna or the microchip by welding process.

12. The transponder of claim 11, wherein said welding process is an ultra-sonic welding process.

13. The transponder of claim 11, wherein said welding process is a heat welding process.

14. The transponder of claim 11, wherein said welding process uses non-conductive adhesive.

15. The transponder of claim 14, wherein said welding process uses pressure sensitive adhesive.

16. The transponder of claim 14, wherein said welding process uses hot melt adhesive.

17. The transponder of claim 11, wherein said battery is sealed by welding process.

18. The transponder of claim 11, wherein said transponder is sealed by welding process.

19. The transponder of claim 11, wherein RFID straps are attached to said antenna by welding process.

20. The transponder of claim 11, wherein galvanic connection is formed between the battery and RFID tag circuitry in continuous reel-to-reel process by pressing the battery and RFID tag circuitry together and creating a defined pattern.

21. The transponder of claim 11, wherein galvanic connection is formed between the battery and RFID tag circuitry in stop-and-go, reel-to-reel process by pressing the battery and RFID tag circuitry together and creating a defined pattern.

22. The transponder of claim 1, wherein the battery is a thin film battery.

23. The transponder of claim 1, wherein the battery is replaced by a thin photo voltaic cell.

24. The transponder of claim 23, wherein said transponder comprises a power reservoir.

25. The transponder of claim 24, wherein said power reservoir is attached to an antenna and microchip by using welding process.

26. The transponder of claim 25, wherein said welding process uses conductive adhesive.

27. The transponder of claim 25, wherein said welding process uses non-conductive adhesive.

28. The transponder of claim 24, wherein said power reservoir is attached to an antenna and microchip by using conductive adhesive materials.

29. The transponder of claim 24, wherein said power reservoir is in parallel with said photo voltaic cell.

30. The transponder of claim 24, wherein said power reservoir is in connected with said microchip directly.

31. The transponder of claim 24, wherein said power reservoir is a capacitor.

32. The transponder of claim 24, wherein said power reservoir is a battery.

33. The transponder of claim 1, wherein the battery is a beta decay source power cell.

34. The transponder of claim 33, wherein the beta decay source power cell is a tritium power cell.

35. The transponder of claim 1, wherein transponder identification number contains meaningful data and data is encrypted with cryptographic measures to prevent counterfeiting.

36. A method for fabricating a radio frequency identification (RFID) transponder, comprising:

preparing a substrate, wherein a perforation area is arranged to weaken the tensile strength of the substrate, so that when an adhesive label is attempted to be removed the substrate will tear along the perforation; and

arranging a microchip having a capacitance, a battery and an antenna on the substrate, wherein the microchip is coupled to an inductive loop for forming an appropriate inductance for a resonant circuit, the microchip is arranged to communicate with a reader, the battery is arranged to provide electrical power for operating the transponder, and is attached to the microchip by means of a conductive path, and the antenna is arranged to receive and backscatter radio frequency interrogation radiation, and wherein the battery acts as a ground plane for and is directly electrically coupled to the antenna.

37. The method of claim 36, wherein battery connection to the antenna or microchip is done with mechanically crimping the layers to each other, by using conductive paste or film (ACP, ACF) or soldering.

38. The method of claim 36, wherein the battery is attached to the antenna and the microchip by welding process.

39. The method of claim 38, wherein said welding process is an ultra-sonic welding process.

40. The method of claim 38, wherein said welding process is a heat welding process.

41. The method of claim 38, wherein said welding process uses non-conductive adhesive.

42. The method of claim 41, wherein said welding process uses pressure sensitive adhesive.

43. The method of claim 41, wherein said welding process uses hot melt adhesive.

44. The method of claim 38, wherein said battery is sealed by welding process.

45. The method of claim 38, wherein said transponder is sealed by welding process.

46. The method of claim 38, wherein RFID straps are attached to said antenna by welding process.

47. The method of claim 38, wherein galvanic connection is formed between the battery and RFID tag circuitry comprising at least antenna and microchip in continuous reel-to-reel process by pressing the battery and the RFID tag circuitry together and creating a defined pattern.

48. The method of claim 38, wherein galvanic connection is formed between the battery and RFID tag circuitry in stop-and-go, reel-to-reel process by pressing the battery and RFID tag circuitry together and creating a defined pattern.

49. A radio frequency identification (RFID) transponder, comprising:

a microchip having a capacitance coupled to an inductive loop for forming an appropriate inductance for a resonant circuit, the microchip which is arranged to communicate with a reader;

a battery which is arranged to provide an electrical power for operating the transponder, and is attached to the microchip by means of a conductive path, wherein the battery is a thin photo voltaic cell;

an antenna which is arranged to receive and backscatter radio frequency interrogation radiation, wherein the battery acts as a ground plane for and is directly electrically coupled to the antenna; and

a substrate, on which the microchip, the battery and the antenna are arranged.