RFID tag substrate for metal component

• US 8,807,438 B2
• Filed: 02/22/2007
• Issued: 08/19/2014
• Est. Priority Date: 02/22/2006
• Status: Active Grant

• Current Assignee: TOYO Seikan Kaisha Limited
• Original Assignee: TOYO Seikan Kaisha Limited
• Inventors: Kikuchi, Takayuki, Sotobayashi, Ken, Mori, Masayuki
• Primary Examiner(s): JOHNSON, SONJI N
• Application Number:
  US12/087,780
• Publication Number:
  US 20100219252A1
• Time in Patent Office: 2,735 Days
• Field of Search: 235/488, 235/375, 235/492, 235/385, 340/572.8, 340/572.7
• US Class Current: 235/492
• CPC Class Codes: B65D 2203/10 Transponders
• 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 19/07749 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 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
• 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 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 15/00 Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices variable for purpose of altering directivity H01Q3/00; arrangements of such devices for guiding waves H01P3/20; variable for purpose of modulation H03C7/02
• CPC Class Codes: H01Q 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526

Abstract

The present invention provides an RFID tag substrate in which communication characteristics of an RFID tag do not vary by an influence of contents in a container, the communication characteristics of the RFID tag are not deteriorated even if a metal container is used, the communication characteristics of the RFID tag can be excellently maintained irrespective of a material or contents of a container, and the tag can be reduced in thickness/size, and which can use a general-purpose RFID tag as it is and is suitable for a microwave type RFID tag that uses a UHF band or a frequency band of, e.g., 2.45 GHz in particular.

There is provided an RFID tag substrate 10 on which an RFID tag 20 that performs wireless communication with a reader/writer is disposed, comprising: a substrate layer 11; and a functional layer 12 formed of a high-dielectric-constant layer 12a and a high-permeable layer 12b having different characteristics, wherein the functional layer having predetermined relative dielectric constant and relative permeability is provided, and a product of the relative dielectric constant and the relative permeability is not smaller than 250.

Claims

1. A metal lid that seals a container, comprising:

an opening tab for the container, having a ring hole;

an RFID tag including an IC chip with a memory containing data, and an antenna electrically connected to the IC chip; and

an insulating member completely covering the RFID tag including the IC chip and the antenna,

wherein the antenna comprises elongated strips arranged adjacent to each other and connected together,

the IC chip is connected to one end of one of the elongated strips, and

the RFID tag is disposed in the ring hole through the insulating member.

2. A metal container, comprising:

a container main body; and

a metal lid that seals the metal container,

wherein the metal lid is formed of the metal lid with the RFID tag according to claim 1.

3. The metal lid according to claim 1, wherein the antenna has a rectangular shape slit to have elongated sections.

4. The metal lid according to claim 1, wherein the container is a metal container, and the opening tab is a pull-tab configured to open the metal container.

5. The metal lid according to claim 4, wherein the metal container is a can.

6. The metal lid according to claim 1, wherein the insulating member is press-fitted in the ring hole.

7. A metal article with an RFID tag, comprising:

a metal container;

a metal lid sealingly fixed to the metal container, and including an opening tab having a ring hole therein;

an RFID tag with an IC chip including a memory containing data and a contact member protruding outwards; and

an insulating member completely covering the IC chip while the contact member protrudes outwards through the insulating member without being covered by the insulating member,

wherein the RFID tag covered with the insulating member is disposed in the ring hole of the opening tag and the contact member is electrically connected to the opening tab so that the metal lid functions as an RFID tag antenna through the opening tab.

8. The metal article with an RFID tag according to claim 7, wherein the metal lid is insulated from a base portion of the container.

9. The metal article with an RFID tag according to claim 8, wherein the base portion of the container is formed of a resin coated metal component whose surface is coated with a resin.

10. The metal article with an RFID tag according to claim 7, wherein the IC chip is disposed in the ring hole.

11. The metal article with an RFID tag according to claim 7, wherein the opening tab includes a catching groove in which the contact member is disposed to electrically connect the IC chip with the opening tab.

12. The metal article with an RFID tag according to claim 7, wherein the metal lid and the IC chip are electrically connected with each other when the IC chip is disposed in the ring hole of the opening tab and the contact member comes into contact with the opening tab.

13. The metal article with an RFID tag according to claim 12, wherein the metal container is a can, and the opening tab is a pull-tab configured to open the can.

14. The metal lid according to claim 7, wherein the insulating member is press-fitted in the ring hole.