Polyimide optical materials, polyimide precursor solutions and optical waveguide elements

摘要

Several novel polyimide materials are disclosed. One example is apolyimide material comprising heterocyclic polyimide having an unit represented by the following general formula (1): (wherein Phi₁s may be the same or different and are individually a quadrivalent organic group, the Phi₁s including at least 0.2 molar equivalent of a quadrivalent hetrocyclic group selected from the following Group (a), Psi₁s may be the same or different and are individually a bivalent organic group, and n is a positive integer).