| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize a shielding method capable of shielding electric noise without remarkably increasing the cost, and a multilayered printed wiring board suitable for being used in the shielding method, concerning a shielding method of electric noise in an electronic apparatus wherein a part of a cabinet is constituted of a panel made of non-shielding material like plastic, and a multilayered printed wiring board to be used in the shielding method. SOLUTION: A multilayered printed wiring board 5 is arranged facing the back of a front panel 1 made of non-shielding material like plastic. As to the structure of the multilayered printed wiring board 5, a frame ground layer is formed on a layer positioning on the front panel 1 side, and a signal ground layer and a signal line layer are formed inside the frame ground layer. Thereby the frame ground layer and the part of a cabinet which is made of metal are short-circuited.</p> |
