| 摘要 |
PROBLEM TO BE SOLVED: To suppress loss of a signal when adjustment of a characteristic impedance is performed.SOLUTION: A wiring board includes: a core layer 12 which has electrical conductivity and in which an opening 18 is selectively arranged; signal wiring 16 arranged in the opening 18; and an insulating layer 10 arranged on a main surface of the core layer 12. A distance T1 of the signal wiring 16 along the thickness direction of the core layer 12 is larger than a distance L1 of the signal wiring 16 in the surface direction of the core layer 12. |
