Patent ID: 9034566
Filing Date: 2015-05-19
Classification: C08F,C09D,G02B

Abstract:
1. An optical waveguide, comprising: a substrate; and a clad layer formed on the substrate, the clad layer including at least one of an underclad layer and an overclad layer, wherein the optical waveguide is obtained by forming a core layer for propagating an optical signal, the core layer being disposed on the underclad layer, below the overclad layer, or between the underclad layer and the overclad layer, in a predetermined pattern, and wherein the clad layer is formed of a resin composition comprising a polyvinyl acetal compound having a structural unit represented by the following general formula (1) at a ratio of 25 wt % or more of the entirety of the resin composition: wherein in the formula (1), R represents an alkyl group having 1 to 3 carbon atoms, and k, m, and n represent ratios of respective repeating units in a main chain and each represent an integer of 1 or more, wherein the resin composition further comprises at least one acrylate-based resin, and wherein the resin composition is obtained by dissolving polymerizable resin components in an organic solvent, and a mixing ratio of the polyvinyl acetal compound having the structural unit represented by the general formula (1) is 20 to 80 wt % with respect to the polymerizable resin components in the resin composition.