| abstract |
An insulating layer and a metal foil present in contact with at least one surface of the insulating layer, wherein the insulating layer has an intrinsic viscosity of 0.03 to 0.12 dl / g as measured in methylene chloride at 25 ° C. A polyphenylene ether copolymer having an average of 1.5 to 3 of a predetermined group at one molecule end per molecule, and a thermosetting curing agent having two or more carbon-carbon unsaturated double bonds at the molecule end, A cured product of a resin composition containing a thermoplastic elastomer, wherein a metal foil and a metal base, and a cobalt-containing barrier layer provided on the metal base at least on the side of the metal base in contact with the insulating layer It is a metal-clad laminated board whose surface roughness of the said contact surface is 2 micrometers or less by ten-point average roughness Rz. |