RFID tag

摘要

Provided is an RFID tag, wherein a communication distance of several centimeter or more can be secured and the cost of which can be reduced in comparison to conventional on-chip antennas, even when being compact in size (square shaped with a side of 1.9 to 13 mm). The RFID tag (80) comprises an antenna (20), an IC chip (30) connected to the antenna (20), and a sealing material (10) that seals the IC chip (30) and the antenna (20). The antenna (20) is a coil antenna or a loop antenna, and the resonance frequency (f0) of an electric circuit constituted by the inductance (L) of the antenna (20) and the capacitance (C) of the IC chip (30) is equal to the operation frequency of the IC chip (30), or in the vicinity thereof.

主权项

1. An RFID tag comprising:
a single-layer antenna; an IC chip having a size of 0.6 mm square or smaller which is connected to the antenna with wire bonding so as not to overlap the antenna; and a sealing material sealing the IC chip and the antenna, wherein the antenna is a coil antenna arranged in a part around the IC chip and including constituent portions adjacent to each other with a gap therebetween, the sealing material being arranged in the gap of the antenna, the antenna has a cap shape of a mushroom in section, a conductor interval to conductor width of the antenna is in a range of 0.2 mm to 0.2 mm to 0.05 mm to 0.05 mm, and a resonant frequency fo of an electric circuit including an inductance L of the antenna and a capacitance C of the IC chip is equal to or close to an operation frequency of the IC chip.