| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve electric characteristics of a wiring board, especially, high speed transmission characteristics of a data signal. <P>SOLUTION: A wiring board comprises: a core substrate; a first wiring layer; and a second wiring layer. The first wiring layer includes wiring patterns 21, 22 and a first floating conductor pattern 23, and formed on a first surface of the core substrate. The second wiring layer includes signal terminals 24 for data signal transmission and power source terminals 25 for power sources, and formed on a second surface of the core substrate opposite to the first surface. The first floating conductor pattern 23 is arranged on the first surface of the core substrate in a region except parts opposite to the signal terminals 24. <P>COPYRIGHT: (C)2013,JPO&INPIT |
