| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed wiring board that has a high shielding property to electromagnetic noise of >1 GHz and is suppressed in the occurrence of electromagnetic noise. SOLUTION: The surface of the printed wiring board 1 is coated with magnetic material layers 2. The magnetic material layers 2 contain fine magnetic particles formed by coating a core material composed of soft magnetic particle with ferrite layers. The core material is composed of at least one kind of alloy selected from among carbonyl iron, Fe-Ni alloy, Fe-Si-Al alloy, Fe-Si alloy, Fe-Co alloy, and Fe-Cr-Al alloy. COPYRIGHT: (C)2005,JPO&NCIPI
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