Patent ID: 7323238

Claim:
A printed board comprising: a thermoplastic resin member made of a thermoplastic resin; a land as an electrode, provided on a land forming surface of the thermoplastic resin member, the land forming surface being positioned on an outer surface of the thermoplastic resin member; a conductor pattern arranged in the thermoplastic resin member and electrically connected to the land; a thermoplastic resin film made of the same thermoplastic resin as the thermoplastic resin member and a carbon black, the carbon black coloring the thermoplastic resin film so as to set a difference in light reflectivity between the land and the thermoplastic resin film to be greater than a difference in light reflectivity between the land and the thermoplastic resin member, wherein: the thermoplastic resin film is arranged on the land forming surface of the thermoplastic resin member; the thermoplastic resin film has an opening portion from which at least a part of the land is exposed; and an amount of the carbon black included in the thermoplastic resin film is 0.01 weight % or more and 1.0 weight % or less.