| 摘要 |
PURPOSE: To enable radiant noises to be less radiated from signal patterns. CONSTITUTION: A multilayer printed board 10 is equipped with a power supply layer 1, a ground layer 2, an inner signal layer 3, through-holes 5-1a to 5-4b, and a continuous clearance 6 provided when the through-holes 5-1a to 5-4b are not connected to the power supply layer 1 and the ground layer 2. A signal pattern 7 is wired with the inner signal layer 3 so as not to make the continuous clearance 6 of the through-holes 5-1a to 5-4b other than through-holes 4a and 4b overlap with the signal pattern 7 in a plan view, whereby radiant noises are less radiated from the signal pattern 7. |
