| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a printed circuit board which has low impedance of power supply wiring in order to manufacture a high-speed and high-integration electronic circuit device by reducing the power supply noise. SOLUTION: In a printed wiring board, a through hole 4 connecting a bypass capacitor connecting land 2 and an inner layer power supply wiring 6 is adjacently placed. In this way, magnetic coupling between inductances of the through hole 4 is reinforced and wiring inductance of a bypass capacitor 1 is reduced. Since the power supply noise of the electronic circuit device is reduced, high speed and high integration of the electronic circuit device can be realized.</p> |
