Patent ID: 9008480
Filing Date: 2015-04-14
Classification: G02B

Abstract:
1. A method of manufacturing an optical waveguide core having an inclined endface, the method comprising: forming a core material layer of a photosensitive material on a surface of a cladding layer that has been formed on a substrate; immersing the core material layer in a high refractive index liquid substance having a refractive index higher than 1 to thereby cover a surface of the core material layer with the high refractive index liquid substance, the core material layer being immersed such that a surface of the core material layer is parallel to a surface of the high refractive index liquid substance; pattern exposing the core material layer, in a predetermined core-forming shape to form a core by irradiating the core material layer on a side covered with the high refractive index liquid substance, and with at least two kinds of exposure light having different angles of inclination with respect to the cladding layer surface, and without moving the core material layer; removing the high refractive index liquid substance from the surface of the core material layer exposed in the pattern exposing; and developing the core material layer from which the high refractive index liquid substance has been removed so as to form the core having an inclined endface.