Patent ID: 7524429

Claim:
A method of fabricating a printed circuit board, comprising: providing a copper clad laminate (CCL) comprising an insulating substrate sandwiched by copper clads, the copper clads having thereon a plurality of copper teeth inlaid into respective surfaces of the insulating substrate; completely removing the copper clads and the copper teeth thereof from the surfaces of the insulating substrate, leaving recesses on the surfaces of the insulating substrate, which increases surface roughness of the insulating substrate; after completely removing the copper clads, laser drilling the insulating substrate to form at least one through hole; plating a chemical copper layer on the insulating substrate and sidewall of the through hole; forming a wire pattern on the surfaces of the insulating substrate, wherein the wire pattern includes at least one contact pad; forming a solder resistant layer on the surface of the insulating substrate, wherein the solder resistant layer has at least one opening exposing the contact pad; and coating a protective layer on the contact pad.