| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wiring board on which a high frequency signal can be efficiently propagated to wiring conductors for signals and an electronic part to be mounted can be normally operated. <P>SOLUTION: In the wiring board provided with insulating layers 1b, a plurality of grounding or power supply conductor layers 4bp, 4cp formed on one main surface of the insulating layers 1b and a plurality of signal wiring conductors 4ap formed on the other main surface of the insulating layer 1b so as to be opposed to the grounding or power supply conductor layers 4bp, 4cp, each of the signal wiring conductors 4ap is formed so as not to be spread over two or more grounding or power supply conductor layers 4bp, 4cp. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
