RF POWDER PARTICLE, RF POWDER, AND RF POWDER-CONTAINING BASE

WIPO Patent Application WO/2008/065992

A1

An RF powder particle, an RF powder, and an RF powder-containing base all making it difficult to make a counterfeit document, a counterfeit bank note, or the like of a sheet object having a high property value such as a bank note, having a tank circuit having a predetermined resonance frequency, and capable of storing necessary information in each of multiple particles. RF powders constitute a coil (24) (inductance element) serving as a magnetic coupling element and provided on an insulating surface of a base (22) and a capacitor (25) (capacitance element) connected to both ends of the coil. The inductance element and the capacitance element form a tank circuit (31). The tank circuit (31) acts as a resonating circuit or a nonresonating circuit depending on a condition in response to a high-frequency magnetic field given from outside.

FURUMURA YUJI (JP)
MURA NAOMI (JP)
NISHIHARA SHINJI (JP)
FUJINO KATSUHIRO (JP)
MISHIMA KATSUHIKO (JP)
KAMIHASHI SUSUMU (JP)

PCT/JP2007/072750

June 05, 2008

November 26, 2007

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PHILTECH INC (JP)
FURUMURA YUJI (JP)
MURA NAOMI (JP)
NISHIHARA SHINJI (JP)
FUJINO KATSUHIRO (JP)
MISHIMA KATSUHIKO (JP)
KAMIHASHI SUSUMU (JP)

G06K19/07; G06K19/077; H01Q7/02; H04B5/02

WO2000036555A1

2000-06-22

JPH08305970A	1996-11-22
JP2005208775A	2005-08-04

TAMIYA, Hiroshi (8th Fl.1-12, Akasaka 1-chom, Minato-ku Tokyo 52, JP)

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