Patent ID: 8554041

Claim:
An optical waveguide for an optical connector, comprising: cores for transmitting light; an under cladding layer provided under the cores; and an over cladding layer provided over the cores, wherein the optical waveguide has a longitudinal end portion configured to be inserted and fixed in a predetermined through hole provided in a ferrule for connection to another optical connector, wherein said under cladding layer has a width less than the width of said through hole, wherein each of said cores is in the form of a ridge continuing in the longitudinal direction and including a photolithographic member made of a photosensitive resin, and wherein said over cladding layer includes a photolithographic member made of a photosensitive resin and provided with respect to the positions of said cores or positioning alignment marks, said over cladding layer covering said cores and said under cladding layer including widthwise end surfaces thereof, no clearance is created between the widthwise end surfaces of said over cladding layer and side surfaces of said through hole when said optical waveguide is fitted into said through hole of said ferrule.