Creating antennas connected to printed chips by post processing with a laser or other cutting device

Patent metadata

Field	Value
Publication number	US-9773203-B2
Application number	US-201414583257-A
Country	US
Kind code	B2
Filing date	Dec 26, 2014
Priority date	Dec 26, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

An RFID antenna structure for use with an RFID device is disclosed. A printed electronic circuit (PEC) is assembled onto an area of a conductor that is initially substantially flat, with minimal apertures cut into it. The substantially flat conductor makes the printing of the functional chip/circuit easier. Then, the conductor is cut post process with a laser or other cutting tool to create the interconnection. In another embodiment, the conductors of the PEC bridge the position where an aperture should be to create part of an RFID antenna. Further, the conductive layer and the PEC are then cut post process to create an antenna for the RFID device.

First claim

What is claimed is:

1. A radio-frequency identification (RFID) antenna structure for use with a RFID device, comprising:
a conductive layer;
an aperture formed in the conductive layer, approximately bisecting the conductive layer into halves;
a printed electronic circuit (PEC) comprising first and second connection points assembled onto the conductive layer, such that the first and second connection points are each positioned on opposite sides of the aperture; and
wherein the conductive layer is cut by a laser to create an antenna for the RFID device and focusing the laser is dependent on depth, such that energy at a height above a surface where a PEC conductor is placed is relatively diffuse compared to concentrated energy at surface of the conductive layer.

2. The RFID antenna structure of claim 1 , wherein the conductive layer is aluminum foil.

3. The RFID antenna structure of claim 2 , wherein the conductive layer is substantially flat.

4. The RFID antenna structure of claim 3 , wherein the aperture is a narrow aperture formed using a laser.

5. The RFID antenna structure of claim 4 , wherein the PEC is designed to function as an ultra-high frequency (UHF) RFID chip.

6. The RFID antenna structure of claim 5 , wherein the conductive layer is cut post process to create an antenna for the RFID device.

7. A radio-frequency identification (RFID) antenna structure for use with a RFID device, comprising:
a conductive layer;
a printed electronic circuit (PEC) comprising first and second connection points and a plurality of conductors assembled onto the conductive layer, such that the plurality of conductors bridge a position to create part of a RFID antenna; and
wherein the conductive layer is cut to create an antenna for the RFID device and the plurality of conductors are transparent at a frequency of operation of a laser, such that the conductive layer is cut without damaging the plurality of conductors.

8. The RFID antenna structure of claim 7 , wherein the conductive layer is aluminum foil.

9. The RFID antenna structure of claim 8 , wherein the conductive layer is substantially flat.

10. The RFID antenna structure of claim 9 , wherein the conductive layer is cut using a laser.

11. The RFID antenna structure of claim 10 , wherein the conductive layer is cut post process to create an antenna for the RFID device.

12. The RFID antenna of claim 11 , wherein cutting of antennas is done through the PEC.

13. The RFID antenna of claim 7 , wherein focusing the laser is dependent on depth, such that energy at a height above a surface where PEC conductor is placed is relatively diffuse compared to concentrated energy at surface of the aluminum foil.

14. The RFID antenna structure of claim 13 , wherein the PEC is designed to function as an ultra-high frequency (UHF) RFID chip.

15. A radio-frequency identification (RFID) antenna structure for use with a RFID device, comprising:
a substantially flat conductive layer comprising aluminum foil;
a printed electronic circuit (PEC) comprising first and second connection points and a plurality of conductors assembled onto the conductive layer, such that the plurality of conductors bridge a position to create part of an RFID antenna; and
wherein the conductive layer is cut post process to create an antenna for the RFID device; and wherein cutting of antennas is done through the PEC, and
wherein the plurality of conductors in the PEC are transparent at a frequency of a laser, such that the aluminum foil is cut without damaging the plurality of conductors.

16. The RFID antenna structure of claim 15 , wherein the conductive layer is cut using a laser.

17. The RFID antenna of claim 16 , wherein focusing the laser is dependent on depth, such that energy at a height above a surface where PEC conductor is placed is relatively diffuse compared to concentrated energy at surface of the aluminum foil.

18. The RFID antenna structure of claim 17 , wherein the PEC is designed to function as one of a high frequency (HF), low frequency (LF), or ultra-high frequency (UHF) RFID chip.

Assignees

• Avery Dennison Retail Information Services Llc

Inventors

• Forster Ian James

Classifications

• H01Q9/285

  Planar dipole (H01Q9/065 takes precedence; patch antenna H01Q9/0407) · CPC title

• H01Q1/2225 Primary

  used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal · CPC title

• G06K19/07718

  the record carrier being manufactured in a continuous process, e.g. using endless rolls · CPC title

• G06K19/07786 Primary

  the antenna being of the HF type, such as a dipole · CPC title