Patent ID: 7447400

Claim:
An optical waveguide substrate, comprising: a substrate having a main surface; an optical waveguide layer, provided on the main surface of said substrate, being composed of resin, said optical waveguide having a first core portion extending in a first direction, a second core portion extending in a second direction intersecting the first direction, and a cladding portion covering said first and second core portions; and an optical component having a reflecting surface which reflects light with a predetermined wavelength, said optical component being arranged on the main surface of said substrate such that light propagating through one of said first and second core portions is reflected toward the other by means of its reflecting surface, wherein said optical waveguide layer has first and second supporting portions which hold said optical component while sandwiching said optical component, said first and second supporting portions being respectively composed of the same materials as said first and second core portions, and being formed on the main surface of said substrate together with said first and second core portions, and wherein said optical component is, together with said first and second core portions, covered by said cladding portion.