PURPOSE: To maintain characteristics and to perform execution of work economically by providing a constitution wherein a first magnetic shielding material having a structure, in which flake shaped soft magnetic amorphous alloy pieces having a specified thickness and an aspect ratio are laminated, is assembled with a second magnetic shielding material compris ing a silicon steel plate or an iron plate having a specified magnetic flux density.
CONSTITUTION: A composite magnetic shielding material comprising the combination of the following materials is formed: a first magnetic shielding material having a structure wherein flake shaped soft magnetic amorphous alloy pieces having a thickness of 5-100 μm and an aspect ratio of 10-15,000 are laminated; and a second magnetic shielding material comprising a silicon steel plate or an iron plate having magnetic flux density of 15,000G or more. In the composite magnetic shielding material having at least two layers, the joint of each layer is shifted. The joint and the continuous body layer are arranged in a neighboring pattern. The first magnetic shielding material is arranged on the side of a low magnetic field, and the second magnetic shielding material is arranged on the side of a high magnetic field. Thus, the magnetic shielding can be performed efficiently and economically. In present inven tion, the joint of each layer of the composite magnetic shielding material having at least two layers is shifted so that the joints are not overlapped. Therefore, the magnetic leaking is very small.
KANEKO MISAO
MASUKO YOSHIYUKI
TODA YUKIO
NISHIMURA KAZUHIRO
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