| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a wiring board which can prevent troubles, such as electrical contact defects, leaks, due to moisture and is required to be improved further, by preventing moisture from penetrating into the wiring board through its outer circumference. SOLUTION: This wiring board 1 has a part 6, through which moisture is drained out and which is formed on at least one of an upper surface 3 and a lower surface 4 of its outer circumferential rib 5. The part 6, through which moisture is drained out, is constituted so as to be at least formed of a large number of minute protrusions 6a.</p> |
