MAGNETIC SHIELD SHEET FOR TAG AND TAG

摘要

PROBLEM TO BE SOLVED: To provide a magnetic shield sheet for a tag and the tag using it capable of interrupting a magnetic field without any energy loss of the magnetic field.

SOLUTION: This magnetic shield sheet 10 is constructed by layering a shield layer 11 and an adhesive layer 12. Since the shield layer 11 is constructed of a material having complex relative permeability ε with a large real part ε', lines of magnetic force pass through the shield layer intensively when the shield layer 11 is arranged in the magnetic field. Therefore, the magnetic field is interrupted by using the magnetic shield sheet 10, and the magnetic field of one area divided by the magnetic shield sheet 10 is prevented from leaking to the other area. Since the shield layer 10 is constructed of a material having complex relative permeability ε with a low imaginary part ε", an energy loss of the magnetic field due to installation of the shield layer 11 can be reduced even if the shield layer 11 is arranged in the magnetic field.

COPYRIGHT: (C)2006,JPO&NCIPI