Patent ID: 7388159

Claim:
A multilayer printed circuit board comprising: a substrate; at least one conductor circuit formed on the substrate; a plurality of insulating layers formed over the substrate, the insulating layers including a first insulating layer and a second insulating layer; and a plurality of conductor circuits formed between the insulating layers, wherein the first insulating layer is laminated on a surface of the substrate and the at least one conductor circuit formed on the substrate, at least one of the conductor circuits and the second insulating layer are formed on the first insulating layer, the insulating layers comprise a thermosetting resin and a thermoplastic resin, the at least one of the conductor circuits formed on the first insulating layer comprises an electroless plated film formed on the first insulating layer and an electrolytic plated film formed on the electroless plated film, and the at least one of the conductor circuits formed on the first insulating layer has an upper surface and side surfaces, the upper and side surfaces of the at least one of the conductor circuits being roughened.