PURPOSE: To enable the effective shielding of electromagnetic waves over a wide range of wavelength regions, by laminating soft magnetic amorphous alloy pieces of specific scale or flake shapes so as to compose first and second amorphous alloy layers and next laminating both the alloy layers at a specific interval in between.
CONSTITUTION: Soft magnetic amorphous alloy pieces of scale or flake shapes, each of which is 5∼100μm in its thickness end 10∼15000 in its aspect ratio (a ratio of maximum length to maximum thickness), are laminated 100∼500g/m2 in weight per unit area so as to compose a plurality of amorphous alloy layers 2a, that is, first and second amorphous alloy layers 2a. Next the first and second amorphous alloy layers 2a are laminated at an interval of 5∼500μm in between. Accordingly, electromagnetic shield performance can be obtained for electromagnetic waves ranging from magnetic field components on a low-frequency region to electric field components on a high-frequency region.
KANEKO MISAO