| 摘要 |
A plurality of wiring patterns are formed on a first surface of a base insulating layer, and a ground layer is formed on a second surface opposite to the first surface. A cover insulating layer is then formed on the first surface of the base insulating layer so as to cover the plurality of wiring patterns. Further, a cover insulating layer is formed on the second surface of the base insulating layer so as to cover the ground layer. A high dielectric insulating layer having a dielectric constant of 10 to 30, for example, is then formed on the cover insulating layer.
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