For Use in Optical WaveguidesNitto Inc.OSAKA, Japan, May 26 -- Nitto Denko Corp. has developed a photosensitive epoxy material that can be used for optical waveguides. The new material is highly transparent in the near-infrared range, and is flexible, so that optical circuits can be created by patterning using ultraviolet exposure -- replacing conventional dry-etching processes. The company said the material can be used to create embedded optical waveguides. The light-transmitting part (core) pattern surface is flat with a rectangular cross-section. 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