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Effect of processing conditions on the properties of polyimide films in optical waveguides

New insights into the relationship between film processing conditions and properties for polyimide-based systems of interest in the fabrication of optical waveguides are presented. The critical role of the rate of solvent evaporation to ensuring high-quality films is explored, as are the effects of varying the casting solution concentration, spin casting, and baking conditions. In addition to film quality, the effect of the previously mentioned processing conditions on optical properties is also described.