| 摘要 |
PURPOSE:To decrease the eccentricity between the rugged pattern on a replica surface and central hole and to obtain a less eccentric optical replica by packing a resin around the central hole and curing the resin in the stage of manufacturing the replica. CONSTITUTION:The rugged pattern corresponding to signals is provided to a pattern-constituting resin 3 on a substrate 2. A metallic plate of Al or the like which is opaque but if flat is usable in addition to optical transparent glass, etc. as the replica substrate 2. The formation of the pattern is executed by a 2P (photo-polymerization) method. A round-bar shaped centering jig 5 subjected to a release treatment at the surface is set at the center of the sub strate. The setting is executed by disposing the jig in such a manner that the center thereof matches nearly exactly with the center of the rugged pattern on a stamper 6. A photosetting resin or the like is cast to the region in the central part 4 of the substrate and is cured by exposure or heat treatment and thereafter the jig 5 is pulled to strip the replica 7. |
