To provide a manufacturing method for an optical recording medium which controls the eccentricity of a center hole at a small level and forms an optical transmission layer of uniform thickness even around the circumference of the center hole.
A pore 12B for manufacturing which is smaller in inner diameter than the center hole is formed in a substrate 12, and a core material 20 is fit so that it may closely contact with the inner circumference of the pore 12B for manufacturing. Then, the optical transmission layer is developed and extended on an information recording surface 12A by supplying a radiation-setting resin around the circumference of the core material 20 and rotatively driving the substrate 12, and the resin is hardened by irradiation, and then the center hole is formed after removing the core material 20 from the pore 12A for manufacturing.
Satoshi Takaya
Tsuyoshi Makino
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