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Manufacturing method of patterned single-layer phase difference material

The present invention provides a method for producing a patterned single-layer phase difference material, which comprises: (I) a step for forming a coating film by applying a polymer composition containing a liquid crystal polymer having an orientation that increases as the amount of exposure is lower than the optimum amount of exposure and that increases as the amount of exposure is higher than the optimum amount of exposure; a property in which the orientation is reduced as the exposure amount is greater under an exposure amount higher than the optimal exposure amount; (II) a step in which the coating film obtained in step (I) is irradiated twice with ultraviolet light to produce a high-anisotropy region having high optical anisotropy by irradiation with polarized ultraviolet light at least once across a mask and a low-anisotropy region having high optical anisotropy by irradiation with polarized ultraviolet light at least once. The low-anisotropy region has relatively low optical anisotropy by making the amount of ultraviolet light insufficient in a region lower than the optimal exposure amount and excessive in a region higher than the optimal exposure amount; and (III) a step for obtaining a phase difference material by heating the coating film obtained in step (II).
Owner:NISSAN CHEM IND LTD
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