RFID tag and RFID tagged article
An RFID tag includes a substrate, an RFIC, and a conductive screw. The substrate includes a first surface and a second surface that are opposite to each other. The RFIC is connected to the first-surface-side conductor pattern provided on the first surface of the substrate. The first surface of the substrate includes a sealing resin layer. The conductive screw is electrically connected to the first-surface-side conductor pattern and the second-surface-side conductor pattern provided on the second surface, and is screwed to a conductive element.
1. An RFID tag comprising:
a substrate comprising:
a first surface and a second surface that are opposite to each other;
a first-surface-side conductor pattern disposed on the first surface;
a second-surface-side conductor pattern disposed on the second surface; and
a plurality of interlayer connection holes extending from the first surface to the second surface and that connect the first-surface-side conductor pattern to the second-surface-side conductor pattern;
an RFIC mounted on the first surface of the substrate, and connected to the first-surface-side conductor pattern or electromagnetically coupled to the first-surface-side conductor pattern; and
a plurality of interlayer connection conductors provided in each of the plurality of interlayer connection holes,
wherein the plurality of interlayer connection conductors include at least one conductive screw inserted in one of the plurality of interlayer connection holes and electrically connecting the first-surface-side conductor pattern to the second-surface-side conductor pattern.
2. The RFID tag according to claim 1 , wherein the first-surface-side conductor pattern, the second-surface-side conductor pattern, and the plurality of interlayer connection conductors collectively define a coil or a loop.
3. The RFID tag according to claim 2 , wherein the coil or the loop includes an open surface.
4. The RFID tag according to claim 3 , wherein the at least one conductive screw comprises an axial direction that is perpendicular to the first surface and the second surface.
5. The RFID tag according to claim 4 , wherein the open surface of the coil or the loop is perpendicular to the first surface and the second surface.
6. The RFID tag according to claim 1 , further comprising a resin layer disposed on the first surface of the substrate and covering the first-surface-side conductor pattern.
7. The RFID tag according to claim 6 , wherein the at least one conductive screw extends through the resin layer to electrically connect the first-surface-side conductor pattern to the second-surface-side conductor pattern.
8. The RFID tag according to claim 6 , wherein a periphery of a lower surface of a head of the at least one conductive screw is in contact with the first-surface-side conductor pattern.
9. The RFID tag according to claim 8 , wherein the head of the at least one conductive screw is entirely disposed below an outer surface of the resin layer.
10. The RFID tag according to claim 1 , wherein the first-surface-side conductor pattern comprises a pair of first-surface-side conductor patterns disposed on the first surface of the substrate.
11. The RFID tag according to claim 10 , wherein the RFIC comprises two terminals connected to each of the pair of first-surface-side conductor patterns.
12. The RFID tag according to claim 10 , wherein an inner surface of the plurality of interlayer connection holes comprises copper plating films and the pair of first-surface-side conductor patterns comprises a copper foil.
13. The RFID tag according to claim 10 , wherein the pair of first-surface-side conductor patterns and the at least one conductive screw comprise a meander-like conductor pattern configured to define a resonant frequency.
14. The RFID tag according to claim 1 , wherein the plurality of interlayer connection conductors include a conductive filling that extends in one of the plurality of interlayer connection holes.
15. An RFID tagged article comprising:
an article including a conductive element; and
an RFID tag comprising:
a substrate comprising a first surface and a second surface that are opposite to each other;
a first-surface-side conductor pattern disposed on the first surface;
a second-surface-side conductor pattern disposed on the second surface; and
a plurality of interlayer connection holes extending from the first surface to the second surface and that connect the first-surface-side conductor pattern to the second-surface-side conductor pattern;
an RFIC mounted on the first surface of the substrate, and connected to the first-surface-side conductor pattern or electromagnetically coupled to the first-surface-side conductor pattern; and
a plurality of interlayer connection conductors provided in each of the plurality of interlayer connection holes,
wherein the plurality of interlayer connection conductors include at least one conductive screw inserted in one of the plurality of interlayer connection holes and electrically connecting the first-surface-side conductor pattern to the second-surface-side conductor pattern,
wherein the RFID tag is screwed to the conductive element by the at least one conductive screw.
16. The RFID tagged article according to claim 15 , wherein the second-surface-side conductor pattern is capacitively coupled to the conductive element, such that the conductive element is configured as an emitter.
17. The RFID tagged article according to claim 15 , wherein the at least one conductive screw comprises a same material as the article.
18. The RFID tagged article according to claim 15 , wherein the first-surface-side conductor pattern, the second-surface-side conductor pattern, and the plurality of interlayer connection conductors collectively define a coil or a loop.
19. The RFID tagged article according to claim 18 , wherein the coil or the loop includes an open surface that is perpendicular to the first surface and the second surface.
20. The RFID tagged article according to claim 19 , wherein the at least one conductive screw comprises an axial direction that is perpendicular to the first surface and the second surface of the substrate.