RFID tags and RFID-tagged items

Abstract

In RFID tags used on elastically deformable articles, the aim is to create a structure that is less susceptible to damage even when the article is deformed. [Solution] The RFID tag 10 includes a first substrate 22, an RFIC chip 24 provided on the first substrate 22, first electrodes 50, 52 provided on the first substrate 22 and electrically connected to the RFIC chip 24, having first surfaces 50a, 52a, flexible antenna conductors 14, 16, second electrodes 54, 56 electrically connected to the antenna conductors 14, 16, having second surfaces 54a, 56a that are spaced apart from the first surfaces of the first electrodes 50, 52 and form capacitance with the first surfaces 50a, 52a, and elastic members 60, 62 that support the first electrodes 50, 52 and the second electrodes 54, 56.

Claims

1. The first substrate and The RFIC chip provided on the first substrate, A first electrode is provided on the first substrate and is electrically connected to the RFIC chip, and has a first surface, A flexible antenna conductor, A second electrode is electrically connected to the antenna conductor and has a second surface that is spaced apart from the first surface of the first electrode and forms a capacitance between itself and the first surface, An RFID tag having an elastic member supporting the first electrode and the second electrode.

2. The RFID tag according to claim 1, wherein each of the first electrode and the second electrode is at least partially embedded in the elastic member such that at least a portion of the elastic member exists between the first surface and the second surface.

3. The RFID tag according to claim 2, wherein the joint between the second electrode and the antenna conductor is embedded within the elastic member.

4. The RFID tag according to claim 3, wherein the RFIC chip, the first substrate, and the first electrode are each embedded throughout the elastic member.

5. The RFID tag according to claim 3, further comprising a rigid member having higher rigidity than the elastic member, in which the portion of the first electrode located outside the RFIC chip, the first substrate, and the elastic member is embedded.

6. The RFID tag according to claim 5, wherein the rigid member is embedded throughout the elastic member.

7. The present invention further comprises a second substrate arranged at a distance from the first substrate, The first electrode is formed on the first substrate, The RFID tag according to claim 1, wherein the second electrode is formed on the second substrate such that the second surface faces the first surface of the first electrode.

8. The antenna conductor includes a first antenna conductor and a second antenna conductor. The RFID tag according to claim 1, wherein each of the first and second antenna conductors is electrically connected to the RFIC chip via the first and second electrodes.

9. The RFID tag according to claim 1, wherein the antenna conductor is spring-shaped.

10. The RFID tag according to claim 1, which is embedded in an elastically deformable article.

11. An RFID tagged article, which is equipped with an RFID tag and is elastically deformable, The RFID tag, First substrate, The RFIC chip provided on the first substrate, A first electrode having a first surface is provided on the first substrate and is electrically connected to the RFIC chip. Flexible antenna conductor, A second electrode having a second surface that is electrically connected to the antenna conductor and is positioned at a distance from the first surface of the first electrode, forming a capacitance between the two surfaces, and An article with an RFID tag, having elastic members supporting the first electrode and the second electrode.

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