Patent ID: 7203388

Claim:
A printed circuit board in which a waveguide is embedded, comprising: a substrate on which a circuit pattern and a target image each having a predetermined shape are formed; a lower clad layer formed on the substrate, said circuit pattern, and said target image through a predetermined process to allow an optical signal irradiated thereto to be total-reflected thereby; a core layer formed on the lower clad layer through a predetermined process and exposed using an exposing film on which a waveguide pattern is formed to form to define the waveguide with a predetermined shape for a large area therefrom; and an upper clad layer formed on the core layer through a predetermined process to allow the optical signal irradiated thereto through said waveguide to be total-reflected thereby; wherein the substrate comprises a copper clad laminate (CCL) including a dielectric layer and copper clads formed on an upper and a lower side of the dielectric layer using a press, the copper clads being patterned to form the circuit pattern and target image each having the predetermined shape therefrom.