| abstract |
An object of the present invention is to provide a plastic optical waveguide material which is excellent in electrical characteristics, heat resistance, and transparency, can be manufactured at a low cost, and can realize a large area. A polybenzoxazole precursor represented by the general formula (A). A polybenzoxazole resin obtained by dehydrating and ring-closing the polybenzoxazole precursor. An optical waveguide material comprising the polybenzoxazole precursor or polybenzoxazole resin. An optical waveguide, wherein a core layer and / or a clad layer is formed using the optical waveguide material. [In the formula (A), X represents a divalent group or a divalent organic group represented by the formula (1), and Y represents a tetravalent group or a tetravalent organic group represented by the formula (2). Is shown. ] [Selection diagram] None |