Patent ID: 8148647

Claim:
A printed circuit board comprising: a carbon-fiber-reinforced plastic core layer provided with a first throughhole therein; a metal protection film covering both surfaces of the core layer and an inner wall of the first throughhole; an insulation layer composed of cured prepregs, the insulation layer covering the both surfaces of the core layer covered with the protection film and the inner wall of the first throughhole; circuit layers each formed on the outer surfaces of the insulation layer, the circuit layers provided with wiring layers; and a second throughhole penetrating the core layer and the insulation layer and the circuit layers, the second throughhole formed coaxially with the first throughhole, wherein the inner wall of the second throughhole is plated to be electrically conductive with the wiring layers and the protection film covering the both surfaces of the core layer has a land encircling the first throughhole, wherein the land contacts the core layer and is covered by the insulation layer.