MAGNETIC SHIELD SHEET, METHOD FOR IMPROVING NON-CONTACT IC CARD TRANSMISSION, AND NON-CONTACT IC CARD HOLD CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a magnetic shield sheet capable of passing energy of magnetic field produced by electromagnetic wave of communication frequency without causing loss by concentrating the magnetic field within the sheet surface, to provide a non-contact IC card using it, and to provide a non-contact IC card hold container.

SOLUTION: The magnetic shield sheet 10 consists of a magnetic substance layer 11 and conductor layer 31. The magnetic substance layer 11 has desirable unique material constant μ', μ" for the electromagnetic wave of communication frequency. By adjusting μ' and thickness of the magnetic substance layer 11, resonance frequency and Q value are adjusted.

COPYRIGHT: (C)2008,JPO&INPIT