| http://www.w3.org/ns/prov#value | - The non-solidified negative photoresist material in the core areas is eliminated using ethanol or other solvents known in the art. [0078] In the complementary technique, photoreactive material 90 on a substrate 94 is exposed to an irradiance pattern (holographic or lithographic) where the cladding area is dark and the core areas are bright.
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