| http://www.w3.org/ns/prov#value | - On this lower clad layer thus obtained, a solution of a core material is coated in the same way by spin coating method or dippingmethod to form a layer, which is then subjected to a curing treatment as required to form a core layer.Further, by using fine working techniques such as photolithography and dry etching, a desired waveguide pattern is formed in the core layer.
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