RFID tag substrate for metal component

摘要

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.

主权项

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.