| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the electromagnetic wave noise radiated from a printed wiring board. SOLUTION: A power supply pattern 32 and a ground pattern 33 which are isolated from each other by an insulator 34 in a printed wiring board supply electric power to electronic parts 31 mounted on the wiring board. At the edge section of the ground pattern 33, bent conductive ground sections 38 and 39 extended in the direction of a power supply layer on which the power supply pattern 32 is formed are provided. Even when high-frequency noise is produced between the power supply pattern 32 and the ground pattern 33 when the mounted electronic parts 31 operate, the electromagnetic wave noise MN radiated to the outside from the wiring board is reduced, because the clearance between the patterns 32 and 33 is made narrower by the bent ground sections 38 and 39.</p> |
