| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board using a glass cloth and having excellent signal propagation characteristics while suppressing the cost.SOLUTION: A circuit board 1 includes a resin layer 20, a glass cloth 10 provided in the resin layer 20, and wiring 30 provided in the resin layer 20 along the glass cloth 10. The glass cloth 10 has such a structure that opened glass fiber threads 11a and glass fiber threads 11b having a dielectric constant lower than that of the glass fiber threads 11a are woven while intersecting. Consequently, the circuit board 1 in which the effects of the glass cloth 10 on a signal propagating through the wiring 30 can be minimized is obtained while suppressing the cost. |
