| http://www.w3.org/ns/prov#value | - However, there is a problem in that a polymer or precursor that forms the organic luminescent layer lacks a sufficient resistance to a patterning process such as photolithography, so that it is very difficult to carry out patterning with highly precision. [0008] Further, when several organic layers are to be formed by a vacuum deposition method, it takes a long time.
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