Radio frequency identification static discharge protection

• US 7,342,490 B2
• Filed: 11/23/2004
• Issued: 03/11/2008
• Est. Priority Date: 11/23/2004
• Status: Expired due to Fees

• Current Assignee: RUIZHANG TECHNOLOGY LIMITED COMPANY
• Original Assignee: Alien Technology Corporation
• Inventors: Hadley, Mark Alfred, Craig, Gordon Samuel Wiggins, Hattick, John Berhard, Drzaic, Paul Stephen, Kanemoto, Eric Ryan, Herrmann, Scott John
• Primary Examiner(s): GOINS, DAVETTA WOODS
• Application Number:
  US10/997,608
• Publication Number:
  US 20060117554A1
• Time in Patent Office: 1,204 Days
• Field of Search: 340/572.7, 340/572.1, 340/572.4, 340/572.6, 340/572.8, 340/573.3, 298/29, 156/243, 156/253, 156/302
• US Class Current: 340/572.7
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07735 the record carrier comprising means for protecting against electrostatic discharge
• CPC Class Codes: G08B 13/244 Tag manufacturing, e.g. continuous manufacturing processes
• CPC Class Codes: H01Q 17/004 using non-directional dissipative particles, e.g. ferrite powders H01Q17/005 takes precedence; flake-like H01Q17/002
• CPC Class Codes: Y10T 29/49018 with other electrical component
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.

Abstract

Methods and apparatuses for the protection of radio frequency identification (RFID) devices are described. In one aspect, a static dissipative material is applied to a web of antenna structures. A coating of the static dissipative material is applied continuously across a plurality of antenna structures of a roll of the web material. An RFID integrated circuit (IC) is attached to the web of antenna structures with the dissipative coating, then subsequently tested on the roll. Additional processing is performed to the RFID tag to produce an RFID label.

Claims

1. A method for manufacturing radio frequency identification (RFID) tags comprising:

applying a plurality of RFID antenna structures onto a first side of a web material;

applying a static dissipative material to the web material; and

coupling an RFID integrated circuit (IC) to one of the plurality of antenna structures on the first side of the web material.

2. The method of claim 1, wherein applying the static dissipative material comprises applying the static dissipative material to the first side of the web material, the static dissipative material in contact with a plurality of the antenna structures.

3. The method of claim 2, wherein the static dissipative material is continuous across a plurality of the antenna structures.

4. The method of claim 3, wherein the static dissipative material is applied as a coating.

6. The method of claim 1, wherein the static dissipative material is applied to a second side of the web material.

7. The method of claim 1, wherein the static dissipative material on the first side of the web material is connected to the static dissipative material on the second side of the web material.

8. The method of claim 1, wherein the static dissipative material is selected from the group consisting of tin oxide, indium oxide, and indium tin oxide (ITO).

9. The method of claim 1, further comprising testing an RFID tag while the RFID tag is attached to the web material, the RFID tag including the RFID IC and one of the plurality of antenna structures.

10. The method of claim 1, wherein the static dissipative material has a resistivity of between about 500 Ohms/sq to about 10¹¹ Ohms/sq.

5. A method for manufacturing radio frequency identification (RFID) tags comprising:

applying a plurality of RFID antenna structures onto a first side of a web material;

applying a static dissipative material to the first side of the web material, wherein the static dissipative material is in contact with and continuous across a plurality of the antenna structures and the static dissipative material is applied as continuous strip intersecting the plurality of antenna structures.

11. An apparatus comprising:

a web material;

a plurality of radio frequency identification (RFID) antenna structures deposited on a first side of the web material; and

a static dissipative material coupled to the web material, wherein the static dissipative material is not applied to a strap attach portion of each of the plurality antenna structures.

12. The apparatus of claim 11, wherein the static dissipative material is applied on the first side of the web material.

13. The apparatus of claim 11, wherein the static dissipative material contacts a plurality of the antenna structures.

16. The apparatus of claim 11, wherein the static dissipative material is applied on a second side of the web material.

17. The apparatus of claim 11, wherein the web material includes the static dissipative material.

18. The apparatus of claim 17, wherein the static dissipative material includes conducting fibers embedded in the web material.

19. The apparatus of claim 11, wherein the web material comprises plastic.

20. The apparatus of claim 11, wherein the web material comprises paper.

21. The apparatus of claim 11, wherein the static dissipative material is selected from the group consisting of tin oxide, indium oxide, and indium tin oxide (ITO).

22. The apparatus of claim 11, further comprising a strap attached to one of the plurality of antenna structures, the strap including an RFID integrated circuit (IC).

23. The apparatus of claim 11, wherein the antenna structures are attached to the web material by an adhesive, the adhesive including the static dissipative material.

14. An apparatus comprising:

a web material;

a plurality of radio frequency identification (RFID) antenna structures deposited on a first side of the web material; and

a static dissipative material coupled to the web material, wherein the static dissipative material contacts a plurality of the antenna structures and is not applied to strap attach pads of each of the plurality of the antenna structures.

15. An apparatus comprising:

a web material;

a plurality of radio frequency identification (RFID) antenna structures deposited on a first side of the web material; and

a static dissipative material coupled to the web material, wherein the static dissipative material contacts a plurality of the antenna structures and a plurality of bands of the static dissipative material are applied to the first side of the web material, each band contacting a plurality of the antenna structures.

24. An apparatus for applying a static dissipative material to a substrate, the apparatus comprising:

means for advancing the substrate through the apparatus, wherein the substrate is a web material having a plurality of radio frequency identification (RFID) antenna structures deposited thereon, wherein the means for advancing the web material includes a roller; and

means for applying a static dissipative material to the web.

25. The apparatus of claim 24, wherein the means for dying the static dissipative material applied by the means for applying.

26. The apparatus of claim 24, wherein the means for applying the static dissipative material includes a reservoir for storing the static dissipative material.

27. The apparatus of claim 26, wherein the static dissipative material includes dispersed tin oxide powder in an acrylic coating solution.

28. An apparatus for applying a static dissipative material to a substrate, the apparatus comprising:

at least one roller to advance the substrate through the apparatus, wherein the substrate is a web material having a plurality of radio frequency identification (RFID) antenna structures deposited thereon; and

an applicator to apply a static dissipative material to the web.

29. The apparatus of claim 28, further comprising a dryer to dry the static dissipative material applied by the applicator.

30. The apparatus of claim 28, wherein the applicator includes a reservoir to store the static dissipative material.

31. The apparatus of claim 30, wherein the static dissipative material is a dispersion including tin oxide.

32. The apparatus of claim 28, wherein the roller is insulated.

33. A method for manufacturing radio frequency identification (RFID) tags comprising:

applying a plurality of RFID antenna structures onto a first side of web material;

coupling together electrically the plurality of antenna structures on the web material; and

coupling an RFID integrated circuit (IC) to one of the plurality of antenna structures.

34. The method of claim 33, wherein the plurality of antenna structures are coupled together electrically by a static dissipative material applied to the first side of the web material.

35. The method of claim 34, wherein the static dissipative material is applied as a coating.

36. The method of claim 34, wherein the static dissipative material is applied to a second side of the web material.

37. The method of claim 34, wherein the static dissipative material is selected from the group consisting of tin oxide, indium oxide, and indium tin oxide (ITO).

38. A method for testing further comprising testing an RFID tag while the RFID tag is attached to the web material, the RFID tag including the RFID IC coupled to one of the plurality of antenna structures, and while there are a plurality of other RFID tags, with their corresponding RFID ICs coupled to their corresponding antennas, also on the web material.

39. A method for manufacturing radio frequency identification (RFID) tags comprising:

applying a plurality of RFID antenna structures onto a first side of web material; and

coupling together electrically the plurality of antenna structures on the web material, wherein the plurality of antenna structures are coupled together electrically by a continuous strip, the strip being made of the same material as the plurality of antenna structures.

40. A method for manufacturing radio frequency identification (RFID) tags comprising:

attaching an RFID integrated circuit (IC) to a web material having a plurality of radio frequency identification (RFID) antenna structures attached thereto; and

reducing static discharge during the attaching, wherein reducing static discharge comprises applying a static dissipative material to the web material prior to attaching the RFID IC.

41. The method of claim 40, wherein the static dissipative material is selected form the group consisting of tin oxide, indium oxide, and indium tin oxide (ITO).

42. A method for manufacturing radio frequency identification (RFID) tags comprising:

attaching an RFID integrated circuit (IC) to a web material having a plurality of radio frequency identification (RFID) antenna structures attached thereto; and

reducing static discharge during the attaching, wherein reducing static discharge comprises processing the web material in an apparatus including a static-dissipative roller.

43. A method for manufacturing radio frequency identification (RFID) tags comprising:

attaching an RFID integrated circuit (IC) to a web material having a plurality of radio frequency identification (RFID) antenna structures attached thereto; and

reducing static discharge during the attaching, wherein reducing static discharge comprises processing the web material in an apparatus including an insulated roller.