| 摘要 |
PURPOSE: A printed circuit board and electronic products are provided to shield noises of specific frequency bands by forming a structure in which low impedance regions and high impedance regions are alternately formed. CONSTITUTION: An electronic component(110) is arranged on a first substrate(100). An EBG structure covers at least part of the upper side of the first substrate in order to shield noises which are emitted from the first substrate. A second substrate(200) includes magnetic pillars. The EBG structure is inserted into the second substrate. The EBG structure is composed of metal layers, vias, and patterns. The second substrate shields noises emitted from the first substrate. A shield can is further prepared to cover at least part of the upper side of the first substrate, and the second substrate is combined with the shield can.
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