DISK MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a disk manufacturing method which maintains the efficiency of a manufacturing step without preparing an extra metal stamper and can reduce an environmental load and cost-sharing. SOLUTION: In a disk substrate subjected to injection molding in a substrate molding step, an L0 layer is formed on one face, and a stamper layer that functions as a stamper for an L1 layer is formed on the other face (F101). In the disk substrate, a stamper layer of another disk substrate subjected to injection molding in a similar manner is used as a resin stamper and pressed against a spacer layer to form an L1 layer (F104) after forming the spacer layer on the L0 layer (F102 and F03). Namely, the disk substrate itself to be molded is completed as an optical disk through steps, and in a stage during the step, the disk substrate is used as a resin stamper to the other disk substrate. COPYRIGHT: (C)2007,JPO&INPIT