| 摘要 |
PURPOSE:To easily and inexpensively produce an optical circuit board which decreases the propagation loss of light and has high accuracy by filling a resin to serve as a core into grooves formed on the surface of a planar substrate, then sticking a cover constituting a part of a clad to the apertures of the grooves. CONSTITUTION:The curable resin 2 is filled into the grooves 11 formed on the surface of the planar substrate 1 and the cover 3 is put and pressed on the substrate surface to spread the bleeding out resin, by which the cover 3 is stuck to the substrate. The inside wall surfaces of the grooves and the surface of the cover in contact with the grooves are finished to specular surfaces so that the refractive index after curing of the resin is made higher than the refractive index of the cover 3. Light guides 4 formed in such a manner decreases the propagation loss of light. The optical circuit board having high accuracy is thus easily and expensively produced.
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