Patent ID: 7713767

Claim:
A method of making a circuitized substrate including at least one optical pathway therein, said method comprising: providing a first dielectric layer; providing a first cladding layer on said first dielectric layer; providing a first electrically conductive layer on said first cladding layer; patterning said first electrically conductive layer on said first cladding layer to define at least one upstanding member on said first cladding layer; providing a dielectric optical core on said first cladding layer having at least one end portion contiguous said at least one upstanding member, said dielectric optical core adapted for providing an optical pathway for optical signals passing through said dielectric optical core; removing a portion of said at least one upstanding member on said first cladding layer to define at least one first opening between said at least one upstanding member and said dielectric optical core, said at least one first opening having at least one angular sidewall to form a 45 degree dielectric-to-air reflector; providing a second cladding layer over said dielectric optical core, said at least one first opening and said at least one upstanding member; providing at least one covering layer over said second cladding layer to form a circuitized substrate; and forming at least one second opening within said at least one covering layer and said second cladding layer relative to said at least one angular sidewall such that optical signals passing through said dielectric optical core will be internally reflected off said at least one angular sidewall and pass through said at least one second opening.