MATERIAL COMPOSITION FOR PREPARING OPTICAL WAVEGUIDE AND METHOD FOR PRODUCING OPTICAL WAVEGUIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an optical waveguide having good productivity and the highest refractive index in the core central part and to provide a material composition suitable therefor. SOLUTION: A composition 2 comprising a radical-polymerizable material having a low refractive index, a cationic-polymerizable material having a high refractive index, a radical polymerization initiator effective at a high wavelength and a cationic polymerization initiator effective at a shorter wavelength is used. A transparent container 1 is filled with the composition 2 and irradiated with a first irradiating light 3 effective for the radical-polymerization initiator (a) to thereby polymerize the radical-polymerizable material having the low refractive index in an incorporated state of the cationic-polymerizable material having the high refractive index and the cationic polymerization initiator into a pattern according to the shape of light irradiation. An optically transparent optical path part 4 is once formed (b). When the first irradiating light 3 is continued, a layer 5 having a lower refractive index than that of the surface of the optical path part 4 is formed by a light component to the lateral side from the optical path part 4 (c). An uncured product remaining in the interior of the transparent container 1 is subsequently cured with a second irradiating light 6 (d). COPYRIGHT: (C)2004,JPO