| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite substrate combining a low dielectric constant and a low dielectric loss.SOLUTION: Provided is a composite substrate including: a conductive layer 110; and a hole-containing insulation layer 120 located at the conductive layer 110, and in which the hole-containing insulation layer 120 has a plurality of holes 120a drawing to the thickness direction Dt of the hole-containing insulation layer 120 from the surface of the hole-containing insulation layer 120. |
