| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board where a pair of belt-like wiring conductors can be shielded successfully from outside by forming through conductors for shielding at predetermined intervals along both sides of the pair of belt-like wiring conductors. SOLUTION: This invention relates to the wiring board, wherein first to third grounding or power supply conductor layers 94, 95 and 96 have projection portions 94b, 95b and 96b protruding to inner sides of center portions in long-hole shapes of first to third opening portions 94a, 95b and 96a or an island portion 95c, and the through conductors 54c and 55c connecting the first to third grounding or power-supply conductor layers 94, 95 and 96 are connected to both sides of the pair 72 of belt-like wiring conductors at the protrusion portions 94b, 95b and 96b and/or island portion 95c. COPYRIGHT: (C)2011,JPO&INPIT |
