| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board being capable of adjusting the impedance of a signal line at a specified value and being easily thinned. SOLUTION: In the wiring board 9, the signal lines 2 are arranged in an insulating board 1 while pairs of ground conductor layers 3 are arranged on both upper-lower sides of the signal lines 2. In the wiring board 9, pairs of auxiliary ground-conductor layers 4 are disposed oppositely so as to hold at least parts of the signal lines 2 between the signal lines 2 and each ground conductor layer 3. COPYRIGHT: (C)2006,JPO&NCIPI |
