| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a printed circuit board which can reduce the area of a loop formed by a path, in which a high-frequency power supply current generated in a power supply layer flows via a decoupling capacitor. SOLUTION: In a printed circuit board, terminals 23 to which a plurality of power-supply wirings C are connected and on which a plurality of capacitors 3 are mounted are provided, power-supply wirings B ends, on one side of which are connected to the terminals 23 and which output a high-frequency power- supply current are provided, grounding layers 13 which are arranged in lower layers of the wirings B are provided, parts 25 which are formed into the grounding layers 13 and which are hollowed out along the wirings B to have a width larger than the of the wirings B are provided, power-supply wirings A to which ends, on the other side, of the wirings B are connected and whose width is larger than the width of the hollowed-out parts 25 are provided, and decoupling capacitors 4, which are mounted in connecting parts of the wirings A to the ends on the other side of the wirings B, are provided.</p> |
